Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Kopaev, Yu. V."'
Hypothetical topologically nontrivial superconducting state of two-dimensional electron system is discussed in connection with the problem of pairing with large center-of-mass pair momentum under predominant repulsive screened Coulomb interaction. Di
Externí odkaz:
http://arxiv.org/abs/1209.0884
Autor:
Belyavsky, V. I., Kopaev, Yu. V.
We show that a simplified two-band model describing toroidal magnetic order in two-dimensional crystal is entirely equivalent to the well-known Haldane model of a honeycomb lattice in periodic internal magnetic field with zero total flux through the
Externí odkaz:
http://arxiv.org/abs/1010.2369
Numerical study of momentum-dependent gap function is presented to make clear the origin of superconductivity in copper oxides. We claim that antinodal region with pronounced nesting feature of the Fermi contour gives rise to superconducting pairing
Externí odkaz:
http://arxiv.org/abs/0910.3172
Autor:
Belyavsky, V. I., Kopaev, Yu. V.
Interrelation between the two-particle and mean-field problems is used to describe the strong pseudogap and superconducting states in cuprates. We present strong pseudogap state as off-diagonal short-range order (ODSRO) originating from quasi-station
Externí odkaz:
http://arxiv.org/abs/0704.2742
Autor:
Belyavsky, V. I., Kopaev, Yu. V.
Kinematic constraint arising in the case of superconducting pairing with large momentum results in a cutoff of the screened Coulomb potential excluding large momentum transfers. This leads to a pairing potential oscillating in the real space that ens
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605542
Autor:
Belyavsky, V. I., Kopaev, Yu. V.
We develop Ginzburg-Landau approach to the problem of superconducting pairing with large momentum under screened Coulomb repulsion (eta_K-pairing). Two-component order parameter arising in this scheme can be associated with charge and orbital current
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603099
We consider the necessary conditions of superconducting pairing at repulsive interaction between particles composing a pair with large total momentum: (1) the existence of, at least, one negative eigenvalue of the repulsion potential and (2) mirror n
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310096
Autor:
Belyavsky, V. I., Kopaev, Yu. V.
The pairing of charge carriers with large pair momentum is considered in connection with high-temperature superconductivity of cuprate compounds. The possibility of pairing arises due to some essential features of quasi-two-dimensional electronic str
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203138
Publikováno v:
Phys. Low-Dim. Struct., 1/2, 25-32 (1997)
The giant transverse magnetoresistance is observed in the case of photoinduced nonequilibrium carriers in an asymmetric undoped system of three GaAs/AlGaAs quantum wells at room temperature. In a magnetic field of 75 kOe, the resistance of nanostruct
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812426
Autor:
Gorbatsevich, A. A., Kapaev, V. V., Kopaev, Yu. V., Kucherenko, I. V., Omel'yanovskii, O. E., Tsebro, V. I.
Publikováno v:
JETP Letters, 68(5), 404-411 (1998)
A new phenomenon is observed experimentally in a heavily doped asymmetric quantum-size structure in a magnetic field parallel to the quantum-well layers - a transverse magnetoresistance which is asymmetric in the field (there can even be a change in
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812382