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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kind V. V., Fedorov V. P., Korshunov A. V.
Заглавие : The manifestation of intermolecular hydrogen-bond in a binary naphthalene-β-naphthol mixture
Место публикации : Phys. Status Solidi B. - 1981. - Vol. 108, Is. 2. - P.K143-144. - ISSN 0370-1972, DOI 10.1002/pssb.2221080262
Примечания : Cited References: 5
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : ALEKSANDROVA I. P., ROZANOV O. V., SUKHOVSKII A. A., MOSKVICH Y. N.
Заглавие : SE-77 HIGH-RESOLUTION NMR-STUDY OF FERROELECTRIC TRANSITION IN AMMONIUM HYDROGEN SELENATE
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1982. - Vol. 24, Is. 6. - P1677-1680. - ISSN 0367-3294
Примечания : Cited References: 12
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrova I. P., Rosanov O. V., Sukhovsky A. A., Moskvich Y. N.
Заглавие : Detection of the incommensurate modulation of the hydrogen-bond double-minimum potential in the antiferroelectric phase of NH4HSEO4
Место публикации : Phys. Lett. A. - 1983. - Vol. 95, Is. 6. - P.339-342. - ISSN 0375-9601, DOI 10.1016/0375-9601(83)90035-X
Примечания : Cited References: 15
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : KHOLOPOVA G. D., BONDARENKO V. S., KUZMIN V. I., RUBAILO A. I.
Заглавие : HYDROGEN COMPLEX OF PENTAFLUOROBENZENE WITH DIMETHYLSULFOXIDE
Место публикации : Khimicheskaya Fiz.: MEZHDUNARODNAYA KNIGA, 1984. - Vol. 3, Is. 4. - P618-619. - ISSN 0207-401X
Примечания : Cited References: 6
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : SUKHOVSKY A. A., MOSKVICH Y. N., ROZANOV O. V., ALEKSANDROVA I. P.
Заглавие : POLYMORPHISM OF THE HIGHLY DEUTERATED AMMONIUM HYDROGEN SELENATE
Место публикации : Ferroelectr. Lett. Sect.: GORDON BREACH SCI PUBL LTD, 1984. - Vol. 3, Is. 2. - P45-52. - ISSN 0731-5171, DOI 10.1080/07315178408200584
Примечания : Cited References: 19
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : MOSKVICH Y. N., POLYAKOV A. M., SUKHOVSKII A. A.
Заглавие : NMR-STUDY OF ION MOTION IN CESIUM HYDROGEN SELENATE
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1988. - Vol. 30, Is. 1. - P45-54. - ISSN 0367-3294
Примечания : Cited References: 19
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Arkhipkin V. G.
Заглавие : 2-photon-resonance and 3-photon-resonance displacement of frequencies and interference of quantum transitions
Место публикации : Zhurnal Eksperimentalnoi Teor. Fiz.: MEZHDUNARODNAYA KNIGA, 1995. - Vol. 108, Is. 1. - P.45-52. - ISSN 0044-4510
Примечания : Cited References: 16
Предметные рубрики: ELECTROMAGNETICALLY INDUCED TRANSPARENCY
ATOMIC-HYDROGEN
GENERATION
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berman G. P., Bulgakov E. N., Campbell D. K., Krive I. V.
Заглавие : Quantum nonlinear resonance and quantum chaos in Aharonov-Bohm oscillations in mesoscopic semiconductor rings
Место публикации : Phys. Rev. B: AMERICAN PHYSICAL SOC, 1997. - Vol. 56, Is. 16. - P10338-10354. - ISSN 0163-1829, DOI 10.1103/PhysRevB.56.10338
Примечания : Cited References: 51
Предметные рубрики: EXCITED HYDROGEN-ATOMS
FREQUENCY ELECTROMAGNETIC-FIELD
PERSISTENT CURRENTS
NORMAL-METAL
ENERGY SPACE
LOCALIZATION
TRANSPORT
LOOP
TIME
TRANSMISSION
Аннотация: We consider Aharonov-Bohm oscillations in a mesoscopic semiconductor ring threaded by both a constant magnetic flux and a time-dependent, resonant magnetic field with one or two frequencies. Working in the ballistic regime, we establish that the theory of ''quantum nonlinear resonance'' applies, and thus that this system represents a possible solid-state realization of ''quantum nonlinear resonance'' and ''quantum chaos.'' In particular, we investigate the behavior of the time-averaged electron energy at zero temperature in the regimes of (i) an isolated quantum nonlinear resonance and (ii) the transition to quantum chaos, when two quantum nonlinear resonances overlap. The time-averaged energy exhibits sharp resonant behavior as a function of the applied constant magnetic flux, and has a staircase dependence on the amplitude of the external time-dependent field. In the chaotic regime, the resonant behavior exhibits complex structure as a function of flux and frequency. We compare and contrast the quantum chaos expected in these mesoscopic ''solid-state atoms'' with that observed in Rydberg atoms in microwave fields, and discuss the prospects for experimental observation of the effects we predict.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Alekseev K. N., Perina J.
Заглавие : Light squeezing at the transition to quantum chaos
Место публикации : Phys. Rev. E: AMERICAN PHYSICAL SOC, 1998. - Vol. 57, Is. 4. - P4023-4034. - ISSN 1063-651X, DOI 10.1103/PhysRevE.57.4023
Примечания : Cited References: 62
Предметные рубрики: HIGHLY-EXCITED ATOMS
ELECTROMAGNETIC-FIELD
ANHARMONIC-OSCILLATOR
MICROWAVE IONIZATION
MONOCHROMATIC-FIELD
CLASSICAL MECHANICS
PERIODIC-ORBITS
RYDBERG ATOMS
HYDROGEN-ATOM
SYSTEMS
Аннотация: We investigate theoretically the dynamics of squeezed state generation in nonlinear systems possessing a transition from regular to chaotic dynamics in the limit of a large number of photons. As an example, the model of a kicked Kerr oscillator is considered. We show that at the transition to quantum chaos the maximum possible degree of squeezing increases exponentially in time, in contrast to the regular dynamics, where the degree of squeezing increases only powerwise in time. We demonstrate the one-to-one correspondence of the degree of squeezing and the value of the local Lyapunov instability rate in the corresponding classical chaotic system.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanov Y. N., Totz J., Michel D., Klotzsche G., Sukhovsky A. A., Aleksandrova I. P.
Заглавие : Chemical exchange in NH4HSeO4 single crystals studied by two-dimensional H-2 nuclear magnetic resonance
Разночтения заглавия :авие SCOPUS: Chemical exchange in NH4HSeO4 single crystals studied by two-dimensional 2H nuclear magnetic resonance
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 1999. - Vol. 11, Is. 18. - P.3751-3760. - ISSN 0953-8984, DOI 10.1088/0953-8984/11/18/310
Примечания : Cited References: 16
Предметные рубрики: PHASE-TRANSITIONS
CONDUCTIVITY PROCESSES
AMMONIUM
Ключевые слова (''Своб.индексиров.''): hydrogen bonds--nuclear magnetic resonance--single crystals--thermal effects--ammonium hydrogen selenate--ammonium compounds
Аннотация: Processes of chemical exchange of deuterons in partially deuterated ammonium hydrogen selenate, NH4HSeO4 (AHSe), crystals are investigated by means of H-2 nuclear magnetic resonance (NMR) experiments over a wide temperature range. The temperature dependencies of the quadrupole line splittings in the one-dimensional spectra of AHSe above 350 K revealed lineshape changes which are characteristic for chemical exchange processes. A detailed study of these exchange processes in AHSe is achieved by means of two-dimensional H-2 NMR experiments. In the temperature range investigated, a chemical exchange occurs only between those deuteron (proton) sites which are involved in hydrogen bonds (alpha- and beta-positions). It was established that the rates of exchange between all types of hydrogen-bound deuteron are approximately the same. Exchange between these positions and the deuterons in the ND4 groups could not be detected. On the basis of our findings, we finally discuss a model for the microscopic mechanism of hydrogen transport in AHSe.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sadreev A. F., Sukhunin Y. V., Petoral R. M., Uvdal K.
Заглавие : Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface
Место публикации : J. Chem. Phys.: AMER INST PHYSICS, 2004. - Vol. 120, Is. 2. - P954-960. - ISSN 0021-9606, DOI 10.1063/1.1631920
Примечания : Cited References: 38
Предметные рубрики: MOLECULAR-DYNAMICS SIMULATION
HYDROGEN-BOND
MONOLAYERS
MODEL
GOLD
PEPTIDES
ALKANETHIOLS
ACTIVATION
FILMS
CYS
Ключевые слова (''Своб.индексиров.''): gold--ground state--hydrogen bonds--molecules--phase transitions--self assembly--surfaces--temperature--arg-cysteamines--crystal surface--dipole moments--dipole-dipole interactions--molecular dynamics
Аннотация: The translational and orientation order of arg-cysteamine molecules chemiabsorbed on the Au(111) crystal surface is considered. Couplings between carbon, nitrogen, and hydrogen atoms of the n-alkanethiols are approximated by the Lennard-Jones potential. Moreover, hydrogen bonds between oxygen and nitrogen and dipole-dipole interactions of the dipole moments of different atomic groups are taken into account. It is found that molecules are arranged in a 2x2 lattice and have the total symmetry C(6)xZ(2). The critical temperature of the phase transition to the tilted state T-c1, which breaks the symmetry C-6, is estimated to be extremely high. The spontaneous breakdown of the remaining symmetry Z(2) leads to the twisted state of the molecules and has the critical temperature T-c2=340 K. (C) 2004 American Institute of Physics.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Ovchinnikov S. G.
Заглавие : Density and thermodynamics of hydrogen adsorbed inside narrow carbon nanotubes
Разночтения заглавия :авие SCOPUS: Density and Thermodynamics of Hydrogen Adsorbed Inside Narrow Carbon Nanotubes
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2004. - Vol. 46, Is. 3. - P584-589. - ISSN 1063-7834, DOI 10.1134/1.1687883
Примечания : Cited References: 21. - This study was supported by the federal program “Integration,” project no. Б0017
Предметные рубрики: MOLECULAR-DYNAMICS
TRANSITIONS
TRANSPORT
ENERGY
TUBES
Аннотация: A model is proposed for calculating the thermodynamic functions and the equilibrium density of a one-dimensional chain of molecules (atoms) adsorbed inside a narrow nanotube. The model considers both the interaction between introduced atoms (molecules) and their interaction with the nanotube walls. The quantum-mechanical effects resulting in discrete energy levels of a particle and in its smeared position between neighbors are taken into account. In calculating the free energy at a nonzero temperature, the phonon contribution and the particle transitions to excited levels are considered. The model is applied to calculate the thermodynamic parameters of adsorbed hydrogen molecules inside extremely narrow single-wall carbon nanotubes of the (3,3) and (6,0) type. It is shown that external pressure gives rise to a sequence of first-order phase transitions, which change the density of adsorbed hydrogen molecules. (C) 2004 MAIK "Nauka / Interperiodica".
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanov Y. N., Sukhovskii A. A., Aleksandrova I. P., Totz J., Michel D.
Заглавие : Nuclear spin resonance study of the ion mobility in a KHSeO4 crystal
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2004. - Vol. 46, Is. 10. - P1845-1850. - ISSN 1063-7834, DOI 10.1134/1.1809417
Примечания : Cited References: 15
Предметные рубрики: POTASSIUM HYDROGEN SULFATE
EXCHANGE NMR
SOLIDS
Аннотация: The ion mobility in a crystal of partially deuterated potassium hydroselenate (KHSe) was studied using nuclear spin resonance (NSR) of H-1, H-2, Se-77, and K-39 in a wide temperature range. The temperature dependences of the deuterium NSR spectra above 360 K exhibit changes in the line shape characteristic of chemical exchange processes. These exchange processes were studied in detail using two-dimensional H-2 NSR spectroscopy. It was ascertained that the exchange between deuterons of hydrogen bonds take place in the entire temperature range under study. However, the measured conductivity was approximately one-hundredfold lower than that estimated from the exchange frequencies. It was assumed that the low conductivity in the temperature range under study is caused by closed dimers of SeO4 groups in the KHSe structure. (C) 2004 MAIK "Nauka / Interperiodica".
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Churilov G. N., Kostinevich E. M., Marchenko S. A., Glushchenko G. A., Bulina N. V., Zaitsev A. I., Vnukova N. G.
Заглавие : Hydrogen sorption by carbon-based substances formed in carbon-helium plasma
Место публикации : Tech. Phys. Lett.: AMER INST PHYSICS, 2005. - Vol. 31, Is. 3. - P233-234. - ISSN 1063-7850, DOI 10.1134/1.1894442
Примечания : Cited References: 7
Аннотация: Hydrogen sorption by various carbonaceous products formed during arc discharge in carbon-helium plasma has been studied. The main product fractions included a fullerene-containing soot, a fullerene mixture extract, a condensate containing carbon nanotubes, and carbonized aluminum oxide. Molecular hydrogen is most effectively sorbed by single-wall carbon nanotubes contained in the carbon condensate fraction. (C) 2005 Pleiades Publishing, Inc.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Sorokin P. B.
Заглавие : Density and thermodynamics of hydrogen adsorbed on the surface of single-walled carbon nanotubes
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2006. - Vol. 48, Is. 2. - P402-407. - ISSN 1063-7834, DOI 10.1134/S1063783406020351
Примечания : Cited References: 22
Предметные рубрики: MOLECULAR-DYNAMICS
ROOM-TEMPERATURE
STORAGE
ADSORPTION
H-2
TRANSITIONS
TUBES
Аннотация: A method is proposed for calculating the adsorption of hydrogen in single-walled carbon nanotubes. This method involves solving the Schrodinger equation for a particle (hydrogen molecule) moving in a potential generated by the surrounding hydrogen molecules and atoms forming the wall of the carbon nanotube. The interaction potential for hydrogen molecules is taken in the form of the Silvera-Goldman empirical potential, which adequately describes the experimental data on the interaction between H(2) molecules (including the van der Waals interaction). The interaction of hydrogen molecules with carbon atoms is included in the calculation through the Lennard-Jones potential. The free energy at a nonzero temperature is calculated with allowance made for the phonon contribution, which, in turn, makes it possible to take into account the correlations in the mutual arrangement of the neighboring molecules. The dependences of the total energy, the free energy, and the Gibbs thermodynamic potential on the applied pressure P and temperature T are calculated for adsorbed hydrogen molecules. These dependences are obtained for the first time with due regard for the quantum effects. The pressure and temperature dependences of the hydrogen density m(P, T) are also constructed for the first time.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kliava J., Malakhovskii A. V., Edelman I. S., Potseluyko A. M., Melnikova S. V., Petrakovskaja E. A., Zarubina T. V., Petrovskii G., Bruckental I., Yeshurun Y.
Заглавие : Reply to "Comment on 'Unusual magnetic transitions and nature of magnetic resonance spectra in oxide glasses containing gadolinium' "
Разночтения заглавия :авие SCOPUS: Reply to "comment on 'unusual magnetic transitions and nature of magnetic resonance spectra in oxide glasses containing gadolinium'"
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2006. - Vol. 74, Is. 2. - Ст.26404. - ISSN 1098-0121, DOI 10.1103/PhysRevB.74.026404
Примечания : Cited References: 8
Предметные рубрики: WALLED CARBON NANOTUBES
HYDROGEN
Аннотация: In this Reply we show that, contrary to the suggestion of Dubroca, Hack, and Hummel (DHH), the feature observed at ca. 55 K in the magnetic susceptibility of gadolinium-containing oxide glasses [as in our earlier paper, Kliava Phys. Rev. B 71, 104406 (2005)] cannot be due to a magnetic transition in oxygen contaminant. In support of this statement, we supply transformed data at low Gd content as well as magnetization curves for a series of glasses containing dysprosium oxide measured with the same superconducting quantum interference device as in our earlier paper. In all these cases the feature in question is absent. Thus, our previous assignment of the 55 K feature to a paramagnetic-to-ferromagnetic transition in Gd clusters in the glass remains the only one consistent with the experimental results.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chernozatonskii L. A., Sorokin P. B., Belova E. E., Bruning J., Fedorov A. S.
Заглавие : Superlattices consisting of "lines" of adsorbed hydrogen atom pairs on graphene
Место публикации : JETP Letters. - 2007. - Vol. 85, Is. 1. - P.77-81. - ISSN 0021-3640, DOI 10.1134/S002136400701016X
Примечания : Cited References: 25
Предметные рубрики: CARBON NANOTUBES
ELECTRON-GAS
GRAPHITE
FILMS
PSEUDOPOTENTIALS
Аннотация: The structures and electron properties of new superlattices formed on graphene by adsorbed hydrogen molecules are theoretically described. It has been shown that superlattices of the (n, 0) zigzag type with linearly arranged pairs of H atoms have band structures similar to the spectra of (n, 0) carbon nanotubes. At the same time. superlattices of the (n, n) type with a "staircase" of adsorbed pairs of H atoms are substantially metallic with a high density of electronic states at the Fermi level and this property distinguishes their spectra from the spectra of the corresponding (n, n) nanotubes. The features of the spectra have the Van Hove form, which is characteristic of each individual superlattice. The possibility of using such planar structures with nanometer thickness is discussed.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chernozatonskii L. A., Sorokin P. B., Bruning J. W.
Заглавие : Two-dimensional semiconducting nanostructures based on single graphene sheets with lines of adsorbed hydrogen atoms
Место публикации : Appl. Phys. Lett. - 2007. - Vol. 91, Is. 18. - Ст.183103. - ISSN 0003-6951, DOI 10.1063/1.2800889
Примечания : Cited References: 24
Предметные рубрики: CARBON
GAS
Ключевые слова (''Своб.индексиров.''): electronic properties--energy gap--graphite--hydrogen--semiconductor materials--superlattices--electronic spectra--graphene sheets--quasi-two-dimensional heterostructures--semiconducting nanostructures--nanostructured materials
Аннотация: It is shown that lines of adsorbed hydrogen pair atoms divide the graphene sheet into strips and form hydrogen-based superlattice structures (2HG-SL). We show that the formation of 2HG-SL changes the electronic properties of graphene from semimetal to semiconductor. The electronic spectra of "zigzag" (n,0) 2HG-SL is similar to that of (n,0) carbon nanotubes and have a similar oscillation of band gap with n, but with nonzero minimal values. The composite dual-periodic (n,0)+(m,0) 2HG-SLs of zigzag strips are analyzed, with the conclusion that they may be treated as quasi-two-dimensional heterostructures. (C) 2007 American Institute of Physics.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Churilov G. N. , Fedorov A. S. , Sorokin P. B., Novikov P. V., Bulina N. V., Marchenko S. A. , Martinez Yu. S. , Gedanken A.
Заглавие : Theoretical study and experimental investigation of hydrogen absorption by carbon nanomaterials
Место публикации : NATO Science for Peace and Security Series A: Chemistry and Biology. - 2007. - Т. 2007, № . - С. 127-132. - ISSN 1874-6489, DOI 10.1007/978-1-4020-5514-0_14
ГРНТИ : 31
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Kuzubov A. A.
Заглавие : New principle of hydrogen adsorption inside nanotubes
Место публикации : Phys. Status Solidi B. - 2007. - Vol. 244: 21st International Winterschool on Electronic Properties of Novel Materials (MAR 10-17, 2007, Kirchberg, AUSTRIA), Is. 11. - P/4327-4330. - ISSN 0370-1972, DOI 10.1002/pssb.200776181
Примечания : Cited References: 4
Аннотация: A new principle of hydrogen (or other gases) adsorption inside single-wall nanotubes is proposed. This principle is based on the mixing of hydrogen with a small quantity of special additive molecules. The diameter of these molecules is chosen to be 2.5-4 angstrom smaller than the nanotube diameter, so these molecules can move along the tube axis. Due to interaction of the molecules and the nanotube walls this molecular movement has potential barriers which should be similar to 0.5-1 eV for the best effect. At those values the mobility of these molecules would be very low at ambient conditions. At high pressures and temperatures (600-900 K) the additive molecules have high mobility, so they can penetrate through open ends into nanotubes quite easily together with molecular hydrogen. These molecules divide the whole volume of the nanotube in separate parts in which the hydrogen molecular gas is locked under high pressure. The main part of the hydrogen is physically adsorbed on the inner walls of the nanotube. After decreasing the temperature the mobility of additive molecules is strongly decreased and hydrogen becomes accumulated inside all parts of the nanotube. As an example, hydrogen adsorption inside boron nitride nanotubes (8,8) is investigated. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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