Non-centrosymmetric superconductivity

We fabricate superconductors of single- or few-layer thickness (such as TMD metal NbSe₂) and develop a range of transport measurement techniques to probe their unconventional properties related to broken inversion symmetry. Recent topics of interests include spin and charge transport involving triplet Cooper pairs, and engineering of topological superconductivity via magnetic proximity coupling.

Possible topological superconducting phases of MoS₂

N. F. Q. Yuan, K. F. Mak, and K. T. Law, Phys. Rev. Lett. 113, 097001 (2014).

Strongly enhanced charge-density-wave order in monolayer NbSe₂

X. Xi, L. Zhao, Z. Wang, H. Berger, L. Forro, J. Shan, and K. F. Mak, Nature Nanotech. 10, 765-769 (2015).

Gate tuning of electronic phase transitions in two-dimensional NbSe₂

X. Xi, H. Berger, L. Forro, J. Shan, and K. F. Mak, Phys. Rev. Lett. 117, 106801 (2016).

Ising pairing in superconducting NbSe₂ atomic layers

X. Xi, Z. Wang, W. Zhao, J.-H. Park, K. T. Law, H. Berger, L. Forro, J. Shan, and K. F. Mak, Nature Phys. 12, 139-143 (2016).

An unusual continuous paramagnetic-limited superconducting phase transition in 2D NbSe₂

E. Sohn, X. Xi, W. He, S. Jiang, Z. Wang, K. Kang, J.-H. Park, H. Berger, L. Forró, K. T. Law, J. Shan, and K. F. Mak, Nature Mater. 17, 504-508 (2018).