Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Penev, E."'
Publikováno v:
Bulgarian Journal of Physics, vol. 38 (2011) 106-112
Band structure trends in hole-doped cuprates and correlations with T_c are interpreted within the s--d exchange mechanism of high-T_c superconductivity. The dependence of T_c on the position of the copper 4s level finds a natural explanation in the g
Externí odkaz:
http://arxiv.org/abs/1103.2966
Autor:
Mishonov, T., Penev, E.
It is analyzed what fundamental new information for the properties of the superconductors can be obtained by systematic investigation of the Bernoulli effect. It is shown that it is a tool to determine the effective mass of Cooper pairs, the volume d
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302168
An explicit expression for the temperature dependence of the specific heat of clean anisotropic-gap superconductors is derived within the weak-coupling BCS approximation. The specific heat is presented as a functional of the superconducting gap on th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212491
Publikováno v:
J. Phys.: Condens. Matter 15, 4429-4456 (2003)
The single-site two-electron exchange amplitude J_sd between the Cu 4s and Cu 3d_{x^2-y^2} states is found to be the pairing mechanism of high-T_c overdoped cuprates. The noninteracting part of the Hamiltonian spans the copper Cu 4s, Cu 3d_{x^2-y^2}
Externí odkaz:
http://arxiv.org/abs/cond-mat/0209191
Within the weak-coupling BCS scheme we derive a general form of the coefficients in the Ginzburg-Landau expansion of the free energy of a superconductor for the case of a Fermi level close to a van Hove singularity (VHS). A simple expression for the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0209192
High-temperature superconductors are nowadays found in great variety and hold technological promise. It is still an unsolved mystery that the critical temperature T_c of the basic cuprates is so high. The answer might well be hidden in a conventional
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206350
Autor:
Mishonov, T., Penev, E.
The free energy, non-gradient terms of the Ginzburg-Landau expansion, and the jump of the specific heat of a multiband anisotropic-gap clean BCS superconductor are derived in the framework of a separable-kernel approximation. Results for a two-band s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206118
A detailed Linear Combination of Atomic Orbitals (LCAO) tight-binding model is developed for the layered High-Temperature Superconductor cuprates. The band structure of these materials is described using a sigma-band Hamiltonian employing Cu4s, Cu3d_
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205616
An analytical result for the renormalization of the jump of the heat capacity Delta C/C_N by the anisotropy of the order parameter is derived within the framework of the very recent model proposed by Posazhennikova, Dahm and Maki [cond-mat/0204272, s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205104
We demonstrate how first-principles calculations using density-functional theory (DFT) can be applied to gain insight into the molecular processes that rule the physics of materials processing. Specifically, we study the molecular beam epitaxy (MBE)
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105430