Publication Date:
2016-02-09
Description:
Author(s): G. M. Pang, M. Smidman, L. X. Zhao, Y. F. Wang, Z. F. Weng, L. Q. Che, Y. Chen, X. Lu, G. F. Chen, and H. Q. Yuan Noncentrosymmetric superconductors such as PbTaSe 2 have been the focus of intensive study due to their unconventional properties and they have also recently been proposed as candidates for topological superconductivity and Majorana fermions. To test this, it is important to characterize the superconducting order parameter. The authors here report precise temperature-dependent measurements of the London penetration depth of PbTaSe 2 . The results indicate fully gapped s -wave BCS-type superconductivity, which is rather puzzling. This compound is known to have a topologically nontrivial band structure and a strong antisymmetric spin-orbit coupling, which, in 2D superconductors, is expected to produce an order parameter with mixed spin singlet and spin triplet components. [Phys. Rev. B 93, 060506(R)] Published Fri Feb 05, 2016
Keywords:
Superfluidity and superconductivity
Print ISSN:
1098-0121
Electronic ISSN:
1095-3795
Topics:
Physics
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