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Физика низких температур, 2006, том 32
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Физика низких температур, 2006, № 04-05
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Перегляд Физика низких температур, 2006, № 04-05 за датою випуску

Перегляд Физика низких температур, 2006, № 04-05 за датою випуску

Результати 1-20 з 22

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Present status of the theory of the high-Tc cuprates

Anderson, P.W. (Физика низких температур, 2006)

The Gutzwiller projected mean-field theory, also called plain vanilla or renormalized meanfield theory, is explained and its successes and possible extensions in describing the phenomenology of the cuprate superconductors ...
Pseudogaps: introducing the length scale into dynamical mean-field theory

Kuchinskii, E.Z.; Nekrasov, I.A.; Sadovskii, V.M. (Физика низких температур, 2006)

Pseudogap physics in strongly correlated systems is essentially scale dependent. We generalize the dynamical mean-field theory (DMFT) by introducing into the DMFT equations dependence on the correlation length of ...
Complexity in high-temperature superconductors

Alvarez, G.; Moreo, A.; Dagotto, E. (Физика низких температур, 2006)

A spin-fermion and Landau–Ginzburg model for high-temperature superconductors are formulated and analyzed with unbiased numerical techniques. The study of the competition between d-wave superconductivity and antiferromagnetism ...
ARPES on high-temperature superconductors: simplicity vs. complexity

Kordyuk, A.A.; Borisenko, S.V. (Физика низких температур, 2006)

A notable role in understanding of microscopic electronic properties of high temperature superconductors (HTSC) belongs to angle resolved photoemission spectroscopy (ARPES). This technique supplies a direct window into ...
Stripe phases — possible ground state of the high-Tc superconductors

Raczkowski, M.; Oles, A.M.; Fresard, R. (Физика низких температур, 2006)

Based on the mean-field method applied either to the extended single-band Hubbard model or to the single-band Peierls-Hubbard Hamiltonian we study the stability of both site-centered and bond-centered charge domain walls. ...
Dynamic properties of inhomogeneous states in cuprates (Review Article)

Lorenzana, J.; Seibold, G. (Физика низких температур, 2006)

We review the static and dynamical properties of stripe textures with regard to their relevance in high-Tc superconductors. Our investigations are based on the time-dependent Gutzwiller approximation which allows for the ...
Nonadiabatic breakdown and pairing in high-Tc compounds

Pietronero, L.; Cappelluti, E. (Физика низких температур, 2006)

The electron-phonon interaction plays a fundamental role on the superconducting and normal state properties of all the high-Tc materials, from cuprates to fullerenes. Another common element of these compounds is in ...
Applying BCS–BEC crossover theory to high-temperature superconductors and ultracold atomic Fermi gases (Review Article)

Qijin Chen; Stajic, J.; Levin, K. (Физика низких температур, 2006)

This review is written at the time of the twentieth anniversary of the discovery of high-temperature superconductors, which, nearly coincides with the important discovery of the superfluid phases of ultracold trapped ...
Gauge theory of pairing and spin fluctuations near the quantum critical point and superhigh-temperature superconductivity

Schrieffer, J.R. (Физика низких температур, 2006)

We develop a new theory of pairing and magnetic effect near the quantum critical point. Several novel properties are predicted: based on a spin fermion model, we derive two new interactions, i) a spin deformational ...
Theory of antiferromagnetic pairing in cuprate superconductors (Review article)

Plakida, N.M. (Физика низких температур, 2006)

A review of the antiferromagnetic exchange and spin-fluctuation pairing theory in the cuprate superconductors is given. We briefly discuss a phenomenological approach and a theory in the limit of weak Coulomb correlations. ...
Spin dynamics in cuprate perovskites

Sherman, A.; Schreiber, M. (Физика низких температур, 2006)

Results obtained with the use of the t–J model of Cu–O planes and Mori’s projection operator formalism are compared with data of neutron scattering experiments in lanthanum and yttrium cuprates. This comparison allows ...
Superconductivity and antiferromagnetism in quasi-one-dimensional organic conductors (Review Article)

Dupuis, N.; Bourbonnais, C.; Nickel, J.C. (Физика низких температур, 2006)

We review the current understanding of superconductivity in the quasi-one-dimensional organic conductors of the Bechgaard and Fabre salt families. We discuss the interplay between superconductivity, antiferromagnetism, ...
Pseudogap and high-temperature superconductivity from weak to strong coupling. Towards quantitative theory (Review Article)

Tremblay, A.-M.S.; Kyung, B.; Sénéchal, D. (Физика низких температур, 2006)

This is a short review of the theoretical work on the two-dimensional Hubbard model performed in Sherbrooke in the last few years. It is written on the occasion of the twentieth anniversary of the discovery of high-temperature ...
The role of the Coulomb interaction in the formation of superconducting and pseudogap states in cuprate metal-oxides

Pashitskii, E.A.; Pentegov, V.I. (Физика низких температур, 2006)

It is shown that the key role in the mechanism of high-Tc superconductivity in the layered cuprate metal-oxides with anisotropic quasi-two-dimensional electronic spectrum and d-wave symmetry of the superconducting order ...
Correlated band structure of electron-doped cuprate materials

Dahnken, C.; Potthoff, M.; Arrigoni, E.; Hanke, W. (Физика низких температур, 2006)

We present a numerical study of the doping dependence of the spectral function of the n-type cuprates. Using a variational cluster-perturbation theory approach based upon the self-energyfunctional theory, the spectral ...
Interaction of strongly correlated electrons and acoustical phonons

Moskalenko, V.A.; Entel, P.; Digor, D.F. (Физика низких температур, 2006)

We investigate the interaction of correlated electrons with acoustical phonons using the extended Hubbard–Holstein model. The Lang–Firsov canonical transformation allows one to obtain mobile polarons for which a new ...
Investigation of the superconducting energy gap in the compound LuNi₂B₂C by the method of point contact spectroscopy: two-gap approximation

Bobrov, N.L.; Beloborod’ko, S.I.; Tyutrina, L.V.; Chernobay, V.N.; Yanson, I.K.; Naugle, D.G.; Rathnayaka, K.D.D. (Физика низких температур, 2006)

It is shown that the two-gap approximation is applicable for describing the dV/dI(V) spectra of LuNi₂B₂C–Ag point contacts in a wide interval of temperatures. The values and the temperature dependences of the large and ...
Electron structure and electron–phonon interaction in the strongly correlated electron system of cuprates

Ovchinnikov, S.G.; Gavrichkov, V.A.; Korshunov, M.M.; Shneyder, E.I. (Физика низких температур, 2006)

The generalized tight-binding method presents a practical realization of the scheme that describes quasiparticles in strongly correlated electron system and consists of exact intra-cell diagonalization of the model ...
Microwave response of single crystal YBa₂Cu₃O₇–δ films as a probe for pairing symmetry

Pan, V.M.; Kalenyuk, O.A.; Kasatkin, O.L.; Komashko, V.A.; Ivanyuta, O.M.; Melkov, G.A. (Физика низких температур, 2006)

Temperature dependences of the microwave surface impedance, Zs(T), are measured in the c-axis oriented single-crystal high-Tc superconducting cuprate YBa₂Cu₃O₇₋δ (YBCO) thin films deposited by the off-axis dc magnetron ...
Modern superconductive materials for electrical machines and devices working on the principle of levitation

Prikhna, T.A. (Физика низких температур, 2006)

The peculiarities of high-pressure synthesis of highly dense nanostructural MgB₂-based superconductive materials, of thermobaric treatment of MT–YBCO (melt-textured YBa₂Cu₃O₇₋δ- based superconductor), high-pressure ...

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