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AbstractAbstract
[en] On the basis of an analysis of theoretical and numerical studies of model systems and of experiments on superconductivity in doped C60, polyacenes, and the cuprate high-temperature superconductors, we propose that a purely electronic mechanism of superconductivity requires structures at an intermediate scale or mesoscale. Specifically, we address the crucial question of how high-temperature superconducting pairing on the mesoscale can arise from purely repulsive electronic interactions
Primary Subject
Source
FG03-00ER45798; Othernumber: PRBMDO000064000006064511000001; 024129PRB
Record Type
Journal Article
Journal
Physical Review. B, Condensed Matter and Materials Physics; ISSN 1098-0121;
; v. 64(6); p. 064511-064511.9

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Hustler, G.
Manchester Metropolitan Univ. (United Kingdom)1997
Manchester Metropolitan Univ. (United Kingdom)1997
AbstractAbstract
No abstract available
Source
Sep 1997; [vp.]; Available from British Library Document Supply Centre- DSC:DXN014544; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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Kumari, Komal; Singh, Navinder, E-mail: komalphy.hpu@gmail.com, E-mail: sharmakomal611@gmail.com, E-mail: navinder@prl.res.in2020
AbstractAbstract
[en] An introduction to the Zwanzig–Mori–Götze–Wölfle memory function formalism (or generalized Drude formalism) is presented. This formalism is used extensively in analyzing the experimentally obtained optical conductivity of strongly correlated systems such as cuprates and iron-based superconductors. For a broader perspective both the generalized Langevin equation approach and the projection operator approach for the memory function formalism are given. The Götze–Wölfle perturbative expansion of memory function is presented and its application to the computation of the dynamical conductivity of metals is also reviewed. This digest of the formalism contains all the mathematical details for pedagogical purposes. (review)
Source
Available from http://dx.doi.org/10.1088/1361-6404/ab9931; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] Short communication
Original Title
Kharakteristiki annigilyatsii pozitronov v keramike Y-Ba-Cu-O pri defitsite kisloroda
Record Type
Journal Article
Journal
Sverkhprovodimost': Fizika, Khimiya, Tekhnika; ISSN 0131-5366;
; CODEN SFKTE6; v. 5(8); p. 1439-1443

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AbstractAbstract
No abstract available
Source
Aug 1995; 204 p; Available from British Library Document Supply Centre- DSC:D198874; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
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Cheng, H.P.
University of Florida (United States). Funding organisation: USDOE Office of Science (United States)2009
University of Florida (United States). Funding organisation: USDOE Office of Science (United States)2009
AbstractAbstract
[en] Five sessions were held at the Sanibel Symposium 2008. 14 speakers, 5 chair persons for these 5 sessions and a number of posters are presented at the poster sessions.
Primary Subject
Source
2 Nov 2009; 1 p; 2008 Sanibel Symposium Cuprates and Electronic Structure Methods; St. Simons Island, GA (United States); 21-26 Feb 2008; FG02-08ER46487; Also available from OSTI as DE00966712; PURL: https://www.osti.gov/servlets/purl/966712/
Record Type
Report
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Conference
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AbstractAbstract
[en] An investigation has been carried out of strength properties of single crystals of LuBa2Cu3O7-x having submicrometre (74-245 nm) cross-sectional dimensions and oriented in the (100) direction. It has been established that the tensile strength of these crystals is independent of the cross-sectional dimensions, being equal to 4.3±0.7 GPa at 78 K. The maximum measured value of tensile strength has been found to be equal to 4.8 GPa. (author)
Secondary Subject
Source
Available online at the Web site for the Journal Superconductor Science and Technology (ISSN 1361-6668) http://www.iop.org/; Country of input: International Atomic Energy Agency (IAEA); This record replaces 31063600
Record Type
Journal Article
Journal
Superconductor Science and Technology; ISSN 0953-2048;
; v. 7(7); p. 491-494

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External URLExternal URL
AbstractAbstract
[en] In this work, we report on the effect of Y3+ doping on structural, mechanical and electrical properties of Bi-2202 phase. Samples of Bi2Sr1.9Ca0.1−xYxCu2O7+δ with x=0, 0.025, 0.05, 0.075 and 0.10 are elaborated in air by conventional solid state reaction and characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM) combined with EDS spectroscopy, density, Vickers microhardness and resistivity measurements. A good correlation between the variations of the bulk density and the Vickers microhardness with doping is obtained. The SEM photograph shows that the samples are composed of grains with a flat shape that characterizes the Bi-based cuprates. Quantitative EDS analysis confirms the reduction of Ca content and the increase of Y content when x is increased. The variation of resistivity with temperature shows that only samples with x=0, 0.025 and 0.05 present an onset transition to the superconducting state. The higher onset transition temperature is obtained for x=0.025 and is about 93.62K. The transition is wide and is realized in two steps confirming then the presence of the low Tc Bi-2201 phase in the samples. For x=0.075 and 0.10, a transition to a semiconducting state is seen at low temperatures. Some physical parameters are extracted from these curves and discussed. (Author)
Primary Subject
Source
Available from http://boletines.secv.es
Record Type
Journal Article
Journal
Boletin de la Sociedad Espanola de Ceramica y Vidrio; ISSN 0366-3175;
; v. 55(5); 7 p

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External URLExternal URL
Freeman, P.G.; Mole, R.A.; Christensen, N.B.; Stunault, A.; Prabhakaran, D., E-mail: pgfreeman@uclan.ac.uk
arXiv e-print [ PDF ]2018
arXiv e-print [ PDF ]2018
AbstractAbstract
[en] The stability of charge ordered phases is doping dependent, with different materials having particularly stable ordered phases. In the half filled charge ordered phases of the cuprates this occurs at one eighth doping, whereas in charge-stripe ordered La2−xSrxNiO4+δ there is enhanced stability at one third doping. In this paper we discuss the known details of the charge-stripe order in La2−x SrxNiO4+δ, and how these properties lead to the one third doping stability.
Source
SCES 2017: International Conference on Strongly Correlated Electron Systems; Prague (Czech Republic); 17-21 Jul 2017; S0921452617308785; Available from http://dx.doi.org/10.1016/j.physb.2017.11.009; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
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Lercher, M.J.
Cambridge Univ. (United Kingdom)1995
Cambridge Univ. (United Kingdom)1995
AbstractAbstract
No abstract available
Source
Oct 1995; 149 p; Available from British Library Document Supply Centre- DSC:D197909; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
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Reference NumberReference Number
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