arXiv subjects

M. V. Nefedova

Publications and source records attributed to M. V. Nefedova.

2 recordsLinked to original sources

arXiv2009

Effects of pressure-induced phase transitions on superconductivity in the single crystal Fe1.02Se

The temperature dependence of the ac susceptibility for single-crystalline Fe1.02Se has been measured at high pressures to 6.7 GPa. The superconducting transition temperature Tc displays a large increase from 7 K to 30 K in the two-phase region at 0.5 - 1 GPa. Further increase in pressure results in the decrease of Tc. The destruction of superconductivity near 7 GPa is presumably related to a structural transition from orthorhombic to hexagonal. .

cond-mat.supr-con↗

arXiv2001

Effect of pressure on the superconducting Tc of MgB2

Measurements of the superconducting transition temperature Tc have been performed by the inductive method on MgB2 at pressures up to 28 GPa. Tc decreases with applied pressure, exhibiting a cusp at about 9 GPa. We interpret the appearance of this anomaly in the Tc(P) dependence as a result of the pressure-induced electronic transition. Recent band-structure calculations for MgB2 give some support for such an explanation.

cond-mat.supr-con↗