Odd-Parity Superconductivity near an Inversion Breaking Quantum Critical Point in One Dimension
Author(s)
Ruhman, Yehonatan; Kozii, Vladyslav; Fu, Liang
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We study how an inversion-breaking quantum critical point affects the ground state of a one-dimensional electronic liquid with repulsive interaction and spin-orbit coupling. We find that regardless of the interaction strength, the critical fluctuations always lead to a gap in the electronic spin sector. The origin of the gap is a two-particle backscattering process, which becomes relevant due to renormalization of the Luttinger parameter near the critical point. The resulting spin-gapped state is topological and can be considered as a one-dimensional version of a spin-triplet superconductor. Interestingly, in the case of a ferromagnetic critical point, the Luttinger parameter is renormalized in the opposite manner, such that the system remains nonsuperconducting.
Date issued
2017-05Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Ruhman, Jonathan, Vladyslav Kozii, and Liang Fu. “Odd-Parity Superconductivity Near an Inversion Breaking Quantum Critical Point in One Dimension.” Physical Review Letters 118, no. 22 (May 31, 2017).
Version: Final published version
ISSN
0031-9007
1079-7114