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13 papers · 1 filter
Reflection symmetry in mean-field replica-symmetric spin glasses
N. V. Gribova, V. N. Ryzhov, T. I. Schelkacheva +1
The role of reflection symmetry breaking for the character of the appearance of replica symmetric spin glass state is investigated. We establish the following symmetry rule for cla…
Synthesis and Properties of YbB2
M. A. Avila, S. L. Bud'ko, C. Petrovic +4
We report temperature and field dependent measurements of the magnetic susceptibility, specific heat and resistivity of sintered YbB2 pellets, prepared via two distinct reaction ro…
Collapse transition in mixtures of Bosons and Fermions
S. T. Chui, V. N. Ryzhov
For mixtures of Bose and Fermi alkali atoms, the Fermion degrees of freedom can be integrated out in their {\bf finite temperature} partition function. The final result can be expa…
Experimental Study of Pressure Influence on Tunnel Transport into 2DEG
E. M. Dizhur, A. N. Voronovsky, I. N. Kotel'nikov +2
We present the concept and the results of pilot measurements of tunneling in a system {Al/-GaAs} under pressure up to 2 GPa at 4.2 K. The obtained results may indicate the…
Anisotropic magnetic behavior of GdBa_2Cu_3O_{6+y} single crystals
V. N. Narozhnyi, D. Eckert, G. Fuchs +2
Magnetic properties of high-quality Al-free nonsuperconducting GdBa_2Cu_3O_{6+y} single crystals grown by flux method have been studied. The magnetic anisotropy below the Néel temp…
Electromagnetic response of superconductors and optical sum rule
A. E. Karakozov, E. G. Maksimov, O. V. Dolgov
The interrelation between the condensation energy and the optical sum rules has been investigated. It has been shown that the so called 'partial' sum rule violation is related main…