Odd-parity topological superconductor with nematic order: Application to Cu x Bi 2 Se 3
By Liang Fu. 2014
183 citations recorded by the source corpus.
CuxBi2Se3 was recently proposed as a promising candidate for time-reversal-invariant topological superconductors[1]. In this work, we argue that the unusual anisotropy of the Knight shift observed by Zheng[2], taken together with specific heat measurements, provides strong support for an unconventional odd-parity pairing in the two-dimensional E_u representation of the D3d crystal point group[1], which spontaneously breaks the three-fold rotational symmetry of the crystal, leading to a subsidiary nematic order. We predict that the spin-orbit interaction associated with hexagonal warping plays a crucial role in pinning the two-component order parameter and makes the superconducting state fully-gapped, leading to a topological superconductor. Experimental signatures of the E_u pairing related to the nematic order are discussed.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/b2464fc4b5ffabf1c22fad143d7483cd0085787c
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In Atomic and Molecular Physics, and Optics
- Masatoshi Sato
- Y. Ando
- Ashvin Vishwanath
- Yi-Zhuang You
- A. Nahum
- Ken Shiozaki
- E. Khalaf
- Masahito Ueda
In Condensed Matter Physics
Citations in the corpus
- Topological superconductors: a review (2016, background): “Note that the ∆4 state has nodes in the simplest theory, but these nodes are not protected by any symmetry and hence they can be easily lifted by additional interactions [133].”
- Superconductivity from valley fluctuations and approximate SO(4) symmetry in a weak coupling theory of twisted bilayer graphene (2018, background): “[51] Liang Fu, “Odd-parity topological superconductor with nematic order: Application to cuxbi2se3,” Phys.”