Superconductivity of 2.2 K under Pressure in Helimagnet CrAs

Hisashi Kotegawa; Shingo Nakahara; Hideki Tou; Hitoshi Sugawara

doi:10.7566/JPSJ.83.093702

Superconductivity of 2.2 K under Pressure in Helimagnet CrAs

Superconductivity 2014-08-05 v3 Strongly Correlated Electrons

Authors: Hisashi Kotegawa , Shingo Nakahara , Hideki Tou , Hitoshi Sugawara

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Abstract

We report resistivity measurements of the helimagnet CrAs under pressures. The helimagnetic transition with T_N ~ 265 K at ambient pressure is completely suppressed above a critical pressure of P_c ~ 0.7 GPa, and superconductivity is observed at ~2.2 K for zero resistance, which exists in a wide pressure range extending beyond 3 GPa. Both the upper critical field H_{c2} and the coefficient A in the resistivity increase toward P_c, suggesting that the superconductivity of CrAs is mediated by electronic correlations enhanced in the vicinity of the helimagnetic phase.

Keywords

superconductivity helomagnet CrAs high pressure helimagnetic transition upper critical field electronic correlations

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@article{arxiv.1407.1357,
  title  = {Superconductivity of 2.2 K under Pressure in Helimagnet CrAs},
  author = {Hisashi Kotegawa and Shingo Nakahara and Hideki Tou and Hitoshi Sugawara},
  journal= {arXiv preprint arXiv:1407.1357},
  year   = {2014}
}

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4pages, 4 figures

Superconductivity of 2.2 K under Pressure in Helimagnet CrAs

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