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18 papers · 1 filter
Magnetic phase diagram of the frustrated S=1/2 chain magnet LiCu_2O_2
A. A. Bush, V. N. Glazkov, M. Hagiwara +7
We present the results of the magnetization and dielectric constant measurements on untwinned single crystal samples of the frustrated S=1/2 chain cuprate LiCu_2O_2. Novel magnetic…
Superconductivity in repulsive Fermi-systems at low density
M. Yu. Kagan, D. V. Efremov, M. S. Mar'enko +1
In the large variety of models such as 3D and 2D Fermi-gas model with hard-core repulsion, 3D and 2D Hubbard model, and Shubin-Vonsovsky model we demonstrate the possibility of tri…
Electron spin resonance study of anisotropic interactions in a two-dimensional spin gap magnet PHCC
V. N. Glazkov, T. S. Yankova, J. Sichelschmidt +2
Fine details of the excitation spectrum of the two-dimensional spin-gap magnet PHCC are revealed by electron spin resonance investigations. The values of anisotropy parameters and…
Anomalous resistivity and the electron-polaron effect in the two-band Hubbard model with one narrow band
M. Yu. Kagan, V. V. Val'kov
We search for anomalous normal and superconductive behavior in the two-band Hubbard model with one narrow band. We analyze the influence of electron-polaron effect and Altshuler-Ar…
Condensation of Silica Nanoparticles on a Phospholipid Membrane
V. E. Asadchikov, V. V. Volkov, Yu. O. Volkov +5
The structure of the transient layer at the interface between air and the aqueous solution of silica nanoparticles with the size distribution of particles that has been determined…
Tunnelling defect nanoclusters in hcp 4He crystals: alternative to supersolidity
A. F. Andreev
A simple model based on the concept of resonant tunnelling clusters of lattice defects is used to explain the low temperature anomalies of hcp 4He crystals (mass decoupling from a…