457 citations · 2.8k across the 86 of their papers we have counts for
6 papers · 1 filter
Effect of electron-lattice interaction on the phase separation in strongly correlated electron systems with two types of charge carriers
A. O. Sboychakov, A. L. Rakhmanov, K. I. Kugel
The effect of electron-lattice interaction is studied for a strongly correlated electron system described by the two-band Hubbard model. A two-fold effect of electron-lattice inter…
Evaluation of the two-particle propagator for Hubbard model with the help of Hubbard-I approximation
A. V. Rozhkov, A. L. Rakhmanov
The Hubbard-I approximation is generalized to allow for direct evaluation of the equal-time anomalous two-electron propagator for Hubbard model on two-dimensional square lattice. T…
Asymmetric long Josephson junction acting as a ratchet for a quantum field
A. O. Sboychakov, Sergey Savel'ev, A. L. Rakhmanov +1
We study the escape rate of flux quanta in a long Josephson junction having an asymmetric spatial inhomogeneous critical current density. We show that such a junction can behave as…
Layered superconductors as negative-refractive-index metamaterials
A. L. Rakhmanov, V. A. Yampol'skii, J. A. Fan +2
We analyze the use of layered superconductors as anisotropic metamaterials. Layered superconductors can have a negative refraction index in a wide frequency range for arbitrary inc…
Phase separation in doped systems with spin-state transitions
A. O. Sboychakov, K. I. Kugel, A. L. Rakhmanov +1
Spin-state transitions, observed in many transition metal compounds containing Co and Fe, may occur with the change of temperature, pressure, but also with doping, in…
Terahertz Josephson plasma waves in layered superconductors: spectrum, generation, nonlinear, and quantum phenomena
S. E. Savel'ev, V. A. Yampol'skii, A. L. Rakhmanov +1
The recent growing interest in terahertz (THz) and sub-THz science and technology is due to its many important applications in physics, astronomy, chemistry, biology, and medicine.…