Multiband effects on beta-FeSe single crystals

Details Multiband effects on beta-FeSe single crystals Multiband effects on beta-FeSe single crystals

2012-04-06

arxiv.org/abs/1204.1549v1

Phys. Rev. B 85, 094515 (2012)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.85.094515

We present the upper critical fields Hc2(T) and Hall effect in beta-FeSe single crystals. The Hc2(T) increases as the temperature is lowered for field applied parallel and perpendicular to (101), the natural growth facet of the crystal. The Hc2(T) for both field directions and the anisotropy at low temperature increase under pressure. Hole carriers are dominant at high magnetic fields. However, the contribution of electron-type carriers is significant at low fields and low temperature. Our results show that multiband effects dominate Hc2(T) and electronic transport in the normal state.

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