Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session S08: Superconductivity in Heavy Fermion Compounds and Other Platforms
8:00 AM–11:00 AM,
Thursday, March 7, 2024
Room: L100I
Sponsoring
Unit:
DCMP
Chair: Peter Czajka, NIST
Abstract: S08.00012 : The CPT Kondo Lattice with spin-orbit interaction
10:12 AM–10:24 AM
Presenter:
Zekun Zhuang
(University of Wisconsin-Madison)
Authors:
Zekun Zhuang
(University of Wisconsin-Madison)
Piers Coleman
(Rutgers University)
We consider the CPT Kondo Lattice[1,2], in which conduction electrons are antiferromagnetically coupled to a Yao-Lee spin liquid. This model has been shown to describe a fractionalized spinor order parameter with spontaneous time-reversal symmetry breaking, and gapless Majorana excitations. Here we demonstrate that when a Rashba spin-orbit interaction with nearest-neighbor Kondo interaction is introduced, the Majorana bands become gapped and develop Chern numbers, developing unidirectionally propagating Majorana edge modes. Our model describes a chiral triplet superconductor with spontaneous broken time-reversal symmetry and may be of interest for certain heavy fermion superconductors, such as UTe2.
[1] Piers. Coleman, Aditya Panigrahi and Alexei M. Tsvelik, Phys. Rev. Lett, 129, 177601 (2022).
[2] Alexei M. Tsvelik and Piers Coleman, Phys. Rev. B 106, 125144 (2022).
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