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Compression Changes in Electrical Resistance and Critical Temperature of Nb_{1-x}Se_2Sn_x Single Crystals

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Obolenskiy M., Zavgorodniy A., Vovk R., Nazyrov Z., Goulatis I., Januszczyk M., Latosińska J.

Acta Physica Polonica A

2012

vol. 122

issue 1

159-161

In this work we investigate the influence of hydrostatic pressure (up to 12 kbar) on the critical parameters of Nb_{1-x}Se_2Sn_x (x=0.1 and x=0.15) single crystals. It is shown that a change in the density of states at the Fermi level brings the main contribution to the increase in T_{c} under pressure. Under the effect of hydrostatic pressure, the phonon spectrum is shifted to higher frequencies (narrowed). The estimated Debye temperature is consistent with those obtained from the heat capacity measurements in NbSe_2 single crystals. It is shown that upon increasing hydrostatic pressure the mean free path increases and Nb_{1-x}Se_2Sn_x should be considered as the pure limit in the Ginzburg-Landau theory.

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1 Acta Physica Polonica A

1 2012

1 Goulatis I.

1 Januszczyk M.

1 Latosińska J.

1 Nazyrov Z.

1 Obolenskiy M.

1 Vovk R.

1 Zavgorodniy A.

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Compression Changes in Electrical Resistance and Critical Temperature of Nb_{1-x}Se_2Sn_x Single Crystals