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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Exner P., Seba P., Sadreev A. F., Streda P., Feher P.
Заглавие : Strength of topologically induced magnetic moments in a quantum device
Место публикации : Phys. Rev. Lett.: AMERICAN PHYSICAL SOC, 1998. - Vol. 80, Is. 8. - P1710-1713. - ISSN 0031-9007, DOI 10.1103/PhysRevLett.80.1710
Примечания : Cited References: 13
Предметные рубрики: WAVE-GUIDES
STATES
FLOW
Аннотация: We consider resonant vortices around nodal points of the wave function describing electron transport through a mesoscopic der-ice. With a suitable choice of the device geometry. the dominating role is played of single vortices with a preferred orientation. To characterize the strength of the resulting magnetic moment, we have introduced a "magnetance," the quantity defined in analogy with the device conductance. Its basic properties and possible experimental detection are discussed. [S0031-9007(97)05255-1].
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Val'kov V. V., Golovnya A. A., Dzebisashvili D. M.
Заглавие : The role of anomalous strength operator in the high-T (c) superconductivity theory
Разночтения заглавия :авие SCOPUS: The role of anomalous strength operator in the high- Tc superconductivity theory
Место публикации : Physica B: ELSEVIER SCIENCE BV, 2006. - Vol. 378-80: International Conference on Strongly Correlated Electron Systems (SECES 05) (JUL 26-30, 2005, Vienna, AUSTRIA). - P465-466. - ISSN 0921-4526, DOI 10.1016/j.physb.2006.01.202
Примечания : Cited References: 3
Ключевые слова (''Своб.индексиров.''): superconductivity--t-j-model--superconductivity--t- j-model--approximation theory--frequencies--mathematical operators--numerical methods--superconducting transition temperature--superconductivity--hubbard operator--matsubara frequency--t- j-model--high temperature superconductors
Аннотация: The diagram series structure for Matsubara Green's functions in the Hubbard operators representation have been analyzed for the superconducting (SC) phase in the t-J-model. It has been found that the Hubbard operator diagram technique besides anomalous self-energy operator includes also anomalous strength operator (ASO). With account for ASO Gor'kov equations have been written. ASO are shown to be very essential when anomalous averages are calculated. The anomalous self-energy operator and ASO were derived in one-loop approximation. It has turned out that strength operator components depend oil Matsubara frequency. As a result the SC phase is described by infinite set of integral equations. When deriving the equation for transition temperature in SC phase with s- and d-order parameter symmetry this system has been solved exactly. On the basis of numerical calculations it has been found that the account for strength operator components has fully suppressed SC phase with s-order parameter symmetry in the t-J-model. (c) 2006 Elsevier B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang Y., Jiang X., Gong P., Molokeev M. S., Li X., Li Y., Wu X., Wu Y., Lin Z.
Заглавие : High mechanical strength in Zn4B6O13 with an unique sodalite-cage structure
Место публикации : RSC Adv.: Royal Society of Chemistry, 2017. - Vol. 7, Is. 4. - P.2038-2043. - ISSN 20462069 (ISSN), DOI 10.1039/c6ra25752f
Примечания : Cited References: 44. - The authors acknowledge Dr Siyang Luo for useful discussion. This work is supported by the National Scientific Foundations of China (Grant 11474292), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), and China “863” project (No. 2015AA034203).
Ключевые слова (''Своб.индексиров.''): calculations--mechanical properties--shear stress--thermal expansion--ultraviolet spectroscopy--x ray diffraction--complex environments--first-principles calculation--high mechanical strength--high-pressure x-ray diffractions--mechanical resistance--ultraviolet spectral regions--wide temperature ranges--zero thermal expansion--zinc
Аннотация: Recently, a borate crystal Zn4B6O13 (ZBO) has been focused on since it exhibits novel isotropic near-zero thermal expansion behavior in a wide temperature range. In this work, the mechanical properties in ZBO are studied by high-pressure X-ray diffraction and first-principles calculations. It is found that ZBO possesses the highest mechanical hardness in all known borates whose mechanical properties have been measured. The very high mechanical strength in ZBO mainly originates from the resistance of strong Zn-O bonds to the rotation among BO4 tetrahedra in the unique sodalite-cage structure. Moreover, ZBO shows relatively high mechanical resistance to the axial and shear stress and exhibits high optical transparence in the ultraviolet spectral region under high pressure. Benefitting from these good properties, ZBO may find potential applications in high-precision optical facilities used at extreme conditions under complex environments. © The Royal Society of Chemistry.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Severyukhin A. P., Aberg S., Arsenyev N. N., Nazmitdinov R. G., Pichugin K. N.
Заглавие : Random matrix analysis of the monopole strength distribution in 208Pb
Место публикации : Phys. At. Nucl.: Maik Nauka-Interperiodica Publishing, 2016. - Vol. 79, Is. 6. - P.835-841. - ISSN 10637788 (ISSN), DOI 10.1134/S1063778816060223
Примечания : Cited References: 36. - A.P.S. thanks for the hospitality the Division of Mathematical Physics, Lund University, where a part of this work has been done. This work was partly supported by Russian Foundation for Basic Research (project nos. 16-52-150003 and 16-02-00228).
Аннотация: We study statistical properties of the 0+ spectrum of 208Pb in the energy region Ex ≤ 20 MeV. We use the Skyrme interaction SLy4 as our model Hamiltonian to create a single-particle spectrum and to analyze excited states. The finite-rank separable approximation for the particle–hole interaction enables us to perform the calculations in large configuration spaces. We show that while the position of the monopole resonance centroid is determined by one-phonon excitations of 0+, the phonon–phonon coupling is crucial for the description of the strength distribution of the 0+ spectrum. In fact, this coupling has an impact on the spectral rigidity Δ3(L) which is shifted towards the random matrix limit of the Gaussian orthogonal ensembles.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Krakhalev M. N., Prishchepa O. O., Sutormin V. S., Zyryanov V. Ya.
Заглавие : Director configurations in nematic droplets with tilted surface anchoring
Коллективы : Russian Foundation for Basic Research (RFBR) [15-02-06924, 16-32-00164]; Siberian Branch of the Russian Academy of Sciences (SB RAS) [II.2P 0358-2015-0010]; RFBR [16-32-60036]
Место публикации : Liq. Cryst.: Taylor & Francis, 2017. - Vol. 44, Is. 2. - P.355-363. - ISSN 0267-8292, DOI 10.1080/02678292.2016.1205225. - ISSN 1366-5855(eISSN)
Примечания : Cited References:32. - This work was supported by Russian Foundation for Basic Research (RFBR) under Grants 15-02-06924 and 16-32-00164 and Siberian Branch of the Russian Academy of Sciences (SB RAS) under Complex Program [II.2P 0358-2015-0010], and V.S.S. acknowledges financial support from RFBR [16-32-60036].
Предметные рубрики: DISPERSED LIQUID-CRYSTALS
RIGIDLY FIXED POLES
ELECTRIC-FIELD
POLYMER
Ключевые слова (''Своб.индексиров.''): polymer dispersed liquid crystal--nematic droplet--director--configuration--boundary conditions--surface anchoring strength--optical--texture
Аннотация: The polymer dispersed nematic liquid crystal (LC) with the tilted surface anchoring has been studied. The droplet orientational structures with two point surface defects – boojums and the surface ring defect – are formed within the films. The director tilt angle α = 40° ± 4° at the droplet interface and LC surface anchoring strength Ws ~ 10–6 (J m−2) have been estimated. The bipolar axes within the studied droplets of oblate ellipsoidal form can be randomly oriented are oriented randomly relatively to the ellipsoid axes as opposed to the droplets with homeotropic and tangential anchoring.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ганженко, Игорь Михайлович, Якубайлик, Эдуард Константинович, Зарщикова Г. Г., Камалова Т. Б., Алексеева Л. А.
Заглавие : Снижение засоренности конечного концентрата на Абагурской обогатительной фабрике
Место публикации : Черная металлургия: Бюлл. науч.-тех. и экономич. информации : ЦНИИТЭИ черной металлургии, 2017. - № 3. - С. 39-44. - ISSN 0135-5910
Ключевые слова (''Своб.индексиров.''): обогатительная фабрика--мокрое обогащение--засоренность конечного концентрата--магнетитовое железо--магнитные системы сепараторов--феррит бария--неодим-железо-бор--напряженность магнитного поля--concentration plant--wet concentration--final concentrates dirtiness--magnetite iron--magnetic separator systems--barium ferrite--nd-fe-b composite--magnetic field strength
Аннотация: Приведены результаты изучения засоренности конечного концентрата Абагурской обогатительной фабрики ОАО “Евразруда”. Установлены достижимые границы разделения по содержанию магнетитового железа для сепараторов ПБМ с магнитными системами из композита Nd-Fe-B. Рекомендовано полностью заменить в магнитных системах сепараторов ПБМ феррит бария на композит неодим-железо-бор.The results of the investigation into the dirtiness of the final concentrates at the Abagurskaya Concentration Plant at the OAO “Evrazruda” have been presented. The achievable limits of the separation according to the magnetite iron content in case of the PBM separator with the magnetic systems from the Nd-Fe-B composite have been established. It has been recommended to fully replace the barium ferrite by the Nd-Fe-B composite in the magnetic systems of the PBM separators.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Jiang, Xingxing, Yang, Y.i., Molokeev M. S., Gong, Pifu, Liang, Fei, Wang, Shuaihua, Liu, Lei, Wu, Xiang, Li, Xiaodong, Li, Yanchun, Wu, Shaofan, Li, Wei, Wu, Yicheng, Lin, Zheshuai
Заглавие : Zero linear compressibility in nondense borates with a "Lu-Ban stool"-like structure
Место публикации : Adv. Mater. - 2018. - Vol. 30, Is. 32. - Ст.1801313. - ISSN 0935-9648, DOI 10.1002/adma.201801313. - ISSN 1521-4095(eISSN)
Примечания : Cited References: 28. - X.J., Y.Y., and M.M. contributed equally to this work. The authors acknowledge Zhuohong Yin for useful discussions. This work was supported by the National Scientific Foundations of China (Grant Nos. 11474292, 51702330, 11611530680, 91622118, and 91622124), Russian Foundation for Basic Research (Grant No. 17-52-53031), the Special Foundation of the Director of Technical Institute of Physics and Chemistry (TIPC), the China "863" project (No. 2015AA034203), key project of Beijing Synchrotron Radiation Facility and the Youth Innovation Promotion Association, CAS (outstanding member for Z.L. and Grant No. 2017035 for X.J.).
Предметные рубрики: MECHANICAL METAMATERIALS
PRESSURE
METABORATE
STRENGTH
Ключевые слова (''Своб.индексиров.''): borates--"lu-ban stool"-like structure--ultraviolet transparency--zero--linear compressibility
Аннотация: Discovering materials that exhibit zero linear compressibility (ZLC) behavior under hydrostatic pressure is extremely difficult. To date, only a handful of ZLC materials have been found, and almost all of them are ultrahard materials with densified structures. Here, to explore ZLC in nondense materials, a structural model analogous to the structure of the “Lu‐Ban stool,” a product of traditional Chinese woodworking invented 2500 years ago, is proposed. The application of this model to borates leads to the discovery of ZLC in AEB2O4 (AE = Ca and Sr) with the unique “Lu‐Ban stool”‐like structure, which can obtain a subtle mechanical balance between pressure‐induced expansion and contraction effects. Coupled with the very wide ultraviolet transparent windows, the ZLC behavior of AEB2O4 may result in some unique but important applications. The applications of the “Lu‐Ban stool” model open a new route for pursuing ZLC materials in nondense structural systems.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuular A. A., Simunin M. M., Bermeshev T. V., Voronin A. S., Dobrosmyslov S. S., Fadeev Y. V., Molokeev M. S., Volochaev M. N., Khartov S. V.
Заглавие : The Influence of Alumina Nanofibers on the Physical and Mechanical Properties of Mineral-Filled Polyethylene: an Experimental Study
Место публикации : Tech. Phys. Lett. - 2020. - Vol. 46, Is. 12. - P.1215-1218. - ISSN 10637850 (ISSN), DOI 10.1134/S1063785020120214
Примечания : Cited References: 6. - This study was supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of a state order to the Smart Materials and Structures Research Laboratory on the subject “Development of Multifunctional Smart Materials and Structures Based on Modified Polymer Composites Capable to Operate under Extreme Conditions,” subject no. FEFE-2020-0015
Аннотация: Improvement of physical and mechanical characteristics of mineral-filled polyethylene (MFPE) upon addition of alumina nanofibers with a high aspect ratio has been experimental studied. It is shown that, at the weight concentration of alumina nanofibers of 0.1 wt %, the ultimate tensile strength increases from 3.82 ± 0.04 to 6.70 ± 0.07 MPa and the Young’s modulus increases from 1.08 ± 0.01 to 1.38 ± 0.01GPa (with respect to MFPE). The MFPE/Al2O3 nanofiber composite can be described within a model of weak adhesive interaction between a filler and a matrix with high friction.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Cheng, Lian, Liu, Kai, Wang, Mengqi, Fan, Pengyuan, Zhou, Changrong, Vtyurin A. N., Deng, Heming, Zhang, Ling, Zhang, Haibo, Hu, Yongming, Nan, B.o., Liu, Yang
Заглавие : Improvement of dielectric properties and energy storage performance in sandwich-structured P(VDF-CTFE) composites with low content of GO nanosheets
Место публикации : Nanotechnology. - 2021. - Vol. 32, Is. 42. - Ст.425702. - ISSN 0957-4484, DOI 10.1088/1361-6528/ac1295. - ISSN 1361-6528(eISSN)
Примечания : Cited References: 56. - The authers gratefully acknowledge the support by the National Natural Science Foundation of China: 51902111; DongGuan Innovation Research Team Program: 2020607101007; Dongguan Postgraduate Joint Training (Practice) Workstation: 2019707102018; Guangdong HUST Industrial Technology Research Institute, Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization: 2020B1212060014
Предметные рубрики: CHARGE-DISCHARGE EFFICIENCY
POLYMER NANOCOMPOSITES
BREAKDOWN STRENGTH
Аннотация: Polymer-based dielectric capacitors play a notable part in the practical application of energy storage devices. Graphene oxide (GO) nanosheets can improve the dielectric properties of polymer-based composites. However, the breakdown strength will greatly reduce with the increase of GO content. Hence, the construction of sandwich structure can enhance the breakdown strength without reducing the dielectric constant. Herein, single-layered and sandwich-structured poly(vinylidene fluoride-co-chlorotrifluoroethylene) (P(VDF-CTFE)) nanocomposites with low content of GO nanosheets (1.0 wt%) are prepared via employing a straightforward casting method. Compared with the single-layered composites and pure P(VDF-CTFE), the sandwich-structured composites exhibit comprehensively better performance compared. The sandwich-structured composite with 0.4 wt% GO nanosheets show an excellent dielectric constant of 13.6 (at 1 kHz) and an outstanding discharged energy density of 8.25 J cm−3 at 3400 kV cm−1. These results demonstrate that the growth of the dielectric properties is owing to 2D GO nanosheets and the enhancement of breakdown strength due to the sandwich structure. The results from finite element simulation provide theoretical support for the design of high energy density composites.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fadeeva N. P., Pavlov M. V., Kharchenko I. A., Simunin M. M., Shabanova K. A., Pavlov V. F., Ryzhkov I. I.
Заглавие : High strength ceramic substrates based on perlite and foam silicates for filtration membranes
Место публикации : Membr. Membr. Technol. - 2022. - Vol. 4, Is. 3. - P.170-176. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751622030040
Примечания : Cited References: 32. - The work was performed using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences. This work was partially supported by the Russian Foundation for Basic Research, grant no. 18-29-19078
Аннотация: Samples of two-layer ceramics based on polydisperse powder of the pearlite mineral and foam silicates possessing high compressive strength up to 50 MPa, thermal stability up to 1150°C, and water permeability of 272 m3/h m2 bar have been obtained. According to the X-ray powder diffraction analysis, the supporting substrate material is X-ray amorphous. The average pore size of the supporting substrate is 40 µm, while the average pore size of the modifying layer is 17 µm according to the bubble method and electron microscopy. The obtained materials are promising for use as substrates of microfiltration, ultrafiltration, and nanofiltration membranes.
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