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22 papers · 1 filter
On Stieltjes relations, Painlevé-IV hierarchy and complex monodromy
A. P. Veselov
A generalisation of the Stieltjes relations for the Painlevé-IV transcendents and their higher analogues determined by the dressing chains is proposed. It is proven that if a ratio…
Direct current generation due to harmonic mixing: From bulk semiconductors to semiconductor superlattices
Kirill N. Alekseev, Feodor V. Kusmartsev
We discuss an effect of dc current and dc voltage (stopping bias) generation in a semiconductor superlattice subjected by an ac electric field and its phase-shifted n-th harmonic.…
Quasiparticle lifetimes in the charged Bose gas and the cuprates
A. S. Alexandrov, C. J. Dent
The scattering cross section of a Coulomb potential screened by a charged Bose gas (CBG) is calculated both above and below the Bose-Einstein condensation temperature, using the va…
Suppression of Superconductivity in Mesoscopic Superconductors
M. B. Sobnack, F. V. Kusmartsev
We propose a new boundary-driven phase transition associated with vortex nucleation in mesoscopic superconductors (of size of the order of, or larger than, the penetration depth).…
Evidence for novel polaronic Fermi-liquid in doped oxides
A. S. Alexandrov, Guo-meng Zhao, H. Keller +3
The modern multi-polaron theory predicts a polaronic Fermi-liquid state, but such a state has not been unambigously confirmed by experiment so far. Here we report theoretical and e…
Comment on "High Field Quasiparticle Tunneling in Bi_2Sr_2CaCu_2O_{8+δ} : Negative Magnetoresistance in the Superconducting State" (N.Morozov et al, Phys.Rev. Lett. 84,1784 (2000))
V. N. Zavaritsky, M. Springford, A. S. Alexandrov
We show that the negative c-axis magnetoresistance in cuprates is the normal state feature.