Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Sharapov, Sergei G."'
The density of states and differential entropy per particle are analyzed for Dirac-like electrons in graphene subjected to a perpendicular magnetic field and an in-plane electric field. For comparison, the derived density of states is contrasted with
Externí odkaz:
http://arxiv.org/abs/2412.03703
Autor:
Pourret, Alexandre, Sharapov, Sergei G., Matsuda, Tatsuma D., Knebel, Georg, Zwicknagl, Gertrud, Varlamov, Andrey A.
A series of strong anomalies in the thermoelectric power is observed in the heavy fermion compound YbRh$_2$Si$_2$ under the effect of magnetic field varying in the range from 9.5~T to 13~T. We identify these features with a sequence of topological tr
Externí odkaz:
http://arxiv.org/abs/1908.11700
Autor:
Sharapov, Sergei G., Beck, Hans
Publikováno v:
Phys.Rev.B65:134516,2002
We theoretically investigate the Carlson-Goldman (CG) mode in two-dimensional clean d-wave superconductors using the effective ``phase only'' action formalism. In conventional s-wave superconductors, it is known that the CG mode is observed as a peak
Externí odkaz:
http://arxiv.org/abs/cond-mat/0109004
Ginzburg-Landau theory for the time-dependent phase field in a two-dimensional d-wave superconductor
Publikováno v:
Physica C. 364-365 (2001) 437
We derive a finite temperature time-dependent effective theory for the phase $\theta$ of the pairing field, which is appropriate for a 2D conducting electron system with non-retarded d-wave attraction. As for s-wave pairing the effective action conta
Externí odkaz:
http://arxiv.org/abs/cond-mat/0101353
Publikováno v:
Phys.Rev.B64:134519,2001
We derive finite temperature time-dependent effective actions for the phase of the pairing field, which are appropriate for a 2D electron system with both non-retarded d- and s-wave attraction. As for s-wave pairing the d-wave effective action contai
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012511
Publikováno v:
Phys.Rept. 349 (2001) 1-123
This article reviews the current status of precursor superconducting phase fluctuations as a possible mechanism for pseudogap formation in high-temperature superconductors. In particular we compare this approach which relies on the two-dimensional na
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012082
Publikováno v:
Int. J. Mod. Phys. B. 13 (1999) 3510
The effect of static fluctuations in the phase of the order parameter on the normal and superconducting properties of a 2D system with attractive four-fermion interaction has been studied. Analytic expressions for the fermion Green function, its spec
Externí odkaz:
http://arxiv.org/abs/cond-mat/9906407
Publikováno v:
Low.Temp.Phys. 26 (2000) 414 [Fiz.Nizk.Temp. 26 (2000) 567]
The presence of nonmagnetic impurities in a 2D ``bad metal'' depresses the superconducting Berezinskii-Kosterlitz-Thouless transition temperature, while leaving the pairing energy scale unchanged. Thus the region of the pseudogap non-superconducting
Externí odkaz:
http://arxiv.org/abs/cond-mat/9904126
Publikováno v:
JETP 90 (2000) 993
The effect of static fluctuations in the phase of the order parameter on the normal and superconducting properties of a 2D system with attractive four-fermion interaction is studied. Analytic expressions for the fermion Green's function, its spectral
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811207
Autor:
Quick, Rachel M., Sharapov, Sergei G.
Publikováno v:
Theor.Math.Phys. 122 (2000) 390-401; Teor.Mat.Fiz. 122 (2000) 468-481
A quasi two-dimensional non-relativistic four-Fermi theory is studied at finite temperatures in the next-to-leading order approximation using the Coleman-Weinberg effective potential. The appearance of an imaginary part to the one-loop correction is
Externí odkaz:
http://arxiv.org/abs/cond-mat/9804310