Ising pairing in superconducting NbSe2 atomic layers. Xi, X., Wang, Z., Zhao, W., Park, J., Law, K. T., Berger, H., Forró, L., Shan, J., & Mak, K. F. Nature Physics, 12(2):139–143, February, 2016. ![Ising pairing in superconducting NbSe2 atomic layers [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The properties of two-dimensional transition metal dichalcogenides arising from strong spin–orbit interactions and valley-dependent Berry curvature effects have recently attracted considerable interest. Although single-particle and excitonic phenomena related to spin–valley coupling have been extensively studied, the effects of spin–valley coupling on collective quantum phenomena remain less well understood. Here we report the observation of superconducting monolayer NbSe2 with an in-plane upper critical field of more than six times the Pauli paramagnetic limit, by means of magnetotransport measurements. The effect can be interpreted in terms of the competing Zeeman effect and large intrinsic spin–orbit interactions in non-centrosymmetric NbSe2 monolayers, where the electron spin is locked to the out-of-plane direction. Our results provide strong evidence of unconventional Ising pairing protected by spin–momentum locking, and suggest further studies of non-centrosymmetric superconductivity with unique spin and valley degrees of freedom in the two-dimensional limit.
@article{xi_ising_2016,
title = {Ising pairing in superconducting {NbSe2} atomic layers},
volume = {12},
copyright = {© 2015 Nature Publishing Group},
issn = {1745-2473},
url = {http://www.nature.com/nphys/journal/v12/n2/full/nphys3538.html},
doi = {10.1038/nphys3538},
abstract = {The properties of two-dimensional transition metal dichalcogenides arising from strong spin–orbit interactions and valley-dependent Berry curvature effects have recently attracted considerable interest. Although single-particle and excitonic phenomena related to spin–valley coupling have been extensively studied, the effects of spin–valley coupling on collective quantum phenomena remain less well understood. Here we report the observation of superconducting monolayer NbSe2 with an in-plane upper critical field of more than six times the Pauli paramagnetic limit, by means of magnetotransport measurements. The effect can be interpreted in terms of the competing Zeeman effect and large intrinsic spin–orbit interactions in non-centrosymmetric NbSe2 monolayers, where the electron spin is locked to the out-of-plane direction. Our results provide strong evidence of unconventional Ising pairing protected by spin–momentum locking, and suggest further studies of non-centrosymmetric superconductivity with unique spin and valley degrees of freedom in the two-dimensional limit.},
language = {en},
number = {2},
urldate = {2017-02-01},
journal = {Nature Physics},
author = {Xi, Xiaoxiang and Wang, Zefang and Zhao, Weiwei and Park, Ju-Hyun and Law, Kam Tuen and Berger, Helmuth and Forró, László and Shan, Jie and Mak, Kin Fai},
month = feb,
year = {2016},
keywords = {Electronic properties and materials, Two-dimensional materials},
pages = {139--143},
}
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Here we report the observation of superconducting monolayer NbSe2 with an in-plane upper critical field of more than six times the Pauli paramagnetic limit, by means of magnetotransport measurements. The effect can be interpreted in terms of the competing Zeeman effect and large intrinsic spin–orbit interactions in non-centrosymmetric NbSe2 monolayers, where the electron spin is locked to the out-of-plane direction. 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