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A neutron scattering and mu SR investigation of the magnetic phase transitions of CuB2O4 / M. . Boehm [et al.] // Physica B. - 2002. - Vol. 318: 6th Patras-University Euroconference on Properties of Condensed Matter Probed with X-Ray Scattering-Electron Correlations and Magnetism (SEP 21-25, 2001, PATRAS, GREECE), Is. 4. - P. 277-281, DOI 10.1016/S0921-4526(02)00788-3. - Cited References: 8 . - ISSN 0921-4526

РУБ Physics, Condensed Matter
Рубрики:
COPPER METABORATE
Кл.слова (ненормированные):
magnetic soliton lattice -- Dzyaloshinskii-Moriya interaction -- neutron diffraction -- mu SR
Аннотация: We have investigated the magnetic ground state in CuB2O4, copper metaborate, by means of neutron diffraction and muSR measurements. At T-N = 21 K CuB2O4 undergoes a second-order phase transition from a paramagnetic to an antiferromagnetic commensurate state followed by a second transition at T* = 10 K where the two magnetic sublattices form a soliton lattice, as reported earlier. We give a detailed analysis of the magnetic structure in the commensurate phase which is found to be different from the one published recently. New experimental results are presented which show the existence of a third transition below T approximate to 1.8 K. The magnetic structure remains incommensurate at very low temperatures, but a re-distribution of the magnetic intensities is observed in the neutron diffraction data set which suggests that the phases between the Cu2+ spins are changed. (C) 2002 Elsevier Science B.V. All rights reserved.

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Держатели документа:
Inst Laue Langevin, F-38042 Grenoble 9, France
Swiss Fed Inst Technol, Lab Neutron Scattering, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland
Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
RAS, Inst Phys SB, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Boehm, M.; Roessli, B.; Schefer, J.; Ouladdiaf, B.; Amato, A.; Baines, C.; Staub, U.; Petrakovskii, G. A.; Петраковский, Герман Антонович
}
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Aksenov, S. V.
Manifestation of Majorana modes overlap in the Aharonov-Bohm effect / S. V. Aksenov // J. Phys. Condens. Matter. - 2022. - Vol. 34, Is. 25. - Ст. 255301, DOI 10.1088/1361-648X/ac62a7. - Cited References: 52. - We acknowledge fruitful discussions with A D Fedoseev and M S Shustin. The reported study was funded by Russian Foundation for Basic Research (Project No. 20-02-00015), Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project ‘Study of edge states in one- and two-dimensional topological superconductors’ (No. 20-42-243005) . - ISSN 1361-648X
Кл.слова (ненормированные):
Aharonov–Bohm effect -- spin–orbit interaction -- topological superconductivity -- Majorana bound state -- Majorana mode -- quantum dot -- Kitaev chain
Аннотация: One of the key features of the Majorana bound states emerging in topological superconducting (SC) wires is increasing oscillations of their energy under the growth of magnetic field or chemical potential due to concomitant enhancement of hybridization of the Majorana mode wave functions initially localized at the opposite edges of the structure. In this study we found that the other consequence of it is a shift of Aharonov–Bohm (AB) oscillations of linear-response conductance in an interference device where two ends of the SC wire connected with a normal contact via non-SC wires (arms). In addition, it is accompanied by an oscillation period doubling. The numerical calculations for the spinful system are supported by the analytical results for different spinless models allowing to track the conductance evolution as the hybridization of the Majorana modes increases. It is shown that since the coupling between the different arms and normal contact is implemented only via the different-type Majoranas the AB oscillations acquire a fundamental π/2 shift in comparison with the effect for an analogous system of zero-energy quantum dots.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok street 50/38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Аксенов, Сергей Владимирович
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ALEKSEEV, K. N.
CHAOTIC DYNAMICS IN LIGHT IMPURITY CENTER INTERACTION / K. N. ALEKSEEV, N. V. ALEKSEEVA // Phys. Lett. A. - 1992. - Vol. 162, Is. 1. - P. 82-85, DOI 10.1016/0375-9601(92)90965-O. - Cited References: 26 . - ISSN 0375-9601

РУБ Physics, Multidisciplinary
Рубрики:
QUANTUM OPTICS
CRYSTALS
Аннотация: Interaction of an impurity center in crystal with light and crystal lattice vibrations is considered. Conditions of the transition to Hamiltonian chaos have been obtained for the case of strong and resonant electron-phonon coupling.

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Держатели документа:
Kirensky Institute of Physics, 660036 Krasnoyarsk, Russia, Russian Federation
ИФ СО РАН

Доп.точки доступа:
ALEKSEEVA, N. V.
}
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    Alekseev, K. N.
    Dynamic chaos in the interaction between light and impurity centers in a crystal [Preprint] : препринт. № 598Ф / K. N. Alekseev, G. P. Berman ; Акад. наук СССР [et al.]. - Красноярск : ИФ СО АН СССР, 1989. - 8 p. - Библиогр. - 180 экз.
Перевод заглавия: Динамический хаос при взаимодействии света с примесными центрами в кристалле
   Перевод заглавия: Динамический хаос при взаимодействии света с примесными центрами в кристалле

Держатели документа:
ГУНБ Красноярского края

Доп.точки доступа:
Berman, G. P.; Берман, Геннадий Петрович; Алексеев, Кирилл Николаевич; Академия наук СССР; Сибирское отделение АН СССР; Институт физики им. Л.В. Киренского Сибирского отделения АН СССР
Свободных экз. нет}
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    An effect of reduced S-rich fluids on diamond formation under mantle-slab interaction / Y. V. Bataleva [et al.] // Lithos. - 2019. - Vol. 336-337. - P. 27-39, DOI 10.1016/j.lithos.2019.03.027. - Cited References: 73. - This work was supported by the Russian Science Foundation under Grant No. 14-27-00054 and a state assignment of IGM SB RAS. The authors thank S. Ovchinnikov for his assistance in implementation of the Mossbauer spectroscopy measurements. . - ISSN 0024-4937
   Перевод заглавия: Влияние восстановленных S-обогащенных флюидов на образование алмаза при взаимодействии мантиевых плит
Кл.слова (ненормированные):
Sulfur-rich fluid -- Iron carbide -- Diamond -- Mantle sulfides -- High-pressure experiment
Аннотация: Experimental study, dedicated to understanding the effect of S-rich reduced fluids on the diamond-forming processes under subduction settings, was performed using a multi-anvil high-pressure split-sphere apparatus in Fe3C-(Mg,Ca)CO3-S and Fe0-(Mg,Ca)CO3-S systems at the pressure of 6.3 GPa, temperatures in the range of 900–1600 °C and run time of 18–60 h. At the temperatures of 900 and 1000 °C in the carbide-carbonate-sulfur system, extraction of carbon from cohenite through the interaction with S-rich reduced fluid, as well as C0-producing redox reactions of carbonate with carbide were realized. As a result, graphite formation in assemblage with magnesiowüstite, cohenite and pyrrhotite (±aragonite) was established. At higher temperatures (≥1100 °C) formation of assemblage of Fe3+-magnesiowüstite and graphite was accompanied by generation of fO2-contrasting melts - metal-sulfide with dissolved carbon (Fe-S-C) and sulfide-oxide (Fe-S-O). In the temperature range of 1400–1600 °C spontaneous diamond nucleation was found to occur via redox interactions of carbide or iron with carbonate. It was established, that interactions of Fe-S-C and Fe-S-O melts as well as of Fe-S-C melt and magnesiowüstite, were С0-forming processes, accompanied by disproportionation of Fe. These resulted in the crystallization of Fe3+-magnesiowüstite+graphite assemblage and growth of diamond. We show that a participation of sulfur in subduction-related elemental carbon-forming processes results in sharp decrease of partial melting temperatures (~300 °C), reducting the reactivity of the Fe-S-C melt relatively to FeC melt with respect to graphite and diamond crystallization and decrease of diamond growth rate.

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Держатели документа:
Sobolev Institute of Geology and Mineralogy, Mineralogy Siberian Branch of the Russian Academy of Sciences, Academican Koptyug Ave., 3, Novosibirsk, 630090, Russian Federation
Novosibirsk State University, Pirogova str., 2, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bataleva, Y. V.; Palyanov, Y. N.; Borzdov, Y. M.; Novoselov, I. D.; Bayukov, O. A.; Баюков, Олег Артемьевич
}
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Analysis of interaction of laser-radiation pulses with metal magnetostrictive film / G. P. Berman [et al.] // Solid State Commun. - 1988. - Vol. 67, Is. 12. - P. 1203-1207, DOI 10.1016/0038-1098(88)91084-8. - Cited References: 12 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk, 660036, Russian Federation
ИФ СО РАН
Доп.точки доступа:
Berman, G. P.; Frolov, G. I.; Фролов, Георгий Иванович; Seredkin, V. A.; Середкин, Виталий Александрович; Yakovchuk, V. Yu.; Яковчук, Виктор Юрьевич
}
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Aplesnin, S. S.
Anomalies in magnetoresistance and in the bulk modulus for ferromagnetics with four-spin exchange interaction on the Kondo lattice / S. S. Aplesnin, N. I. Piskunova // J. Phys.: Condens. Matter. - 2006. - Vol. 18, Is. 29. - P. 6859-6868, DOI 10.1088/0953-8984/18/29/023. - Cited References: 29 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
MIXED-VALENCE MANGANITES
   PHASE-SEPARATION
   LA1-XSRXMNO3
   BEHAVIOR
   PECULIARITIES
   TRANSITION
Кл.слова (ненормированные):
Elastic moduli -- Electric resistance -- Ferromagnetism -- Function evaluation -- Paramagnetism -- Transceivers -- Adiabatic approximation -- Kondo lattice -- Paramagnetic state -- Ring exchange -- Magnetoresistance
Аннотация: The temperature dependence of resistivity and the bulk modulus are calculated on the Kondo lattice, with ring exchange between localized spins, using the spin-polaron and adiabatic approximation. Peak and zero values of the bulk modulus as functions of temperature and concentration are determined below the temperature of the transition to the paramagnetic state. The effects of the nearest order between transverse spin components and a value of the ring exchange between localized spins on magnetoresistivity are estimated.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
L v Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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APLESNIN, S. S.
CRITICAL-BEHAVIOR OF DILUTED ISING MAGNETS WITH ANISOTROPIC EXCHANGE INTERACTION DISTRIBUTION / S. S. APLESNIN // Fiz. Tverd. Tela. - 1984. - Vol. 26, Is. 11. - P. 3355-3361. - Cited References: 19 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Aplesnin, S. S.
Dimerization of antiferromagnetic chain with 4-spin interaction / S. S. Aplesnin // Fiz. Tverd. Tela. - 1996. - Vol. 38, Is. 6. - P. 1868-1877. - Cited References: 30 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
SPIN-1/2 HEISENBERG-ANTIFERROMAGNET
   COMPETING INTERACTIONS
   MONTE-CARLO
   THERMODYNAMIC PROPERTIES
   SYSTEMS
   CUGEO3
   TEMPERATURE
   NEUTRON
   STATE
   MODEL

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10.

Aplesnin, S. S.
Influence of the four-spin exchange interaction on the magnetic properties of manganites / S. S. Aplesnin, N. I. Piskunova // J. Phys.: Condens. Matter. - 2005. - Vol. 17, Is. 37. - P. 5881-5888, DOI 10.1088/0953-8984/17/37/023. - Cited References: 18 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
METAL-INSULATOR-TRANSITION
   PHASE
   SUSCEPTIBILITY
   LA1-XSRXMNO3
   FERROMAGNET
   TRANSPORT
Кл.слова (ненормированные):
Computer simulation -- Ion exchange -- Lanthanum compounds -- Magnetic properties -- Monte Carlo methods -- Phase diagrams -- Phase transitions -- Four-spin exchange interaction -- Magnetic phase diagram -- Manganites -- Metal-dielectric transition -- Manganese compounds
Аннотация: It is shown that non-Heisenberg exchange interaction should be taken into account to reproduce the magnetic phase diagram of La(1-x)A(x)MnO(3) (A = Ca, Sr) using only effective exchange parameters and spins. The formation of the four-spin exchange arises from carrier hopping and coincides with the critical concentration metal-dielectric transition. The two- and four-spin exchange parameters are determined by Monte Carlo simulations.

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Держатели документа:
MF Reshetneva Aircosm Siberian State Univ, Krasnoyarsk 660036, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
M F Reshetneva Aircosmic Siberian State University, Krasnoyarsk 660036, Russian Federation
L V Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Science, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Piskunova, N. I.; Аплеснин, Сергей Степанович
}
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