Bibliographic Details
| Title: |
Magnetoelectric generation of a Majorana-Fermi surface in Kitaev's honeycomb model |
| Authors: |
Chari, Rajas, Moessner, Roderich, Rau, Jeffrey G. |
| Source: |
Phys. Rev. B 103, 134444 (2021) |
| Publication Year: |
2020 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Strongly Correlated Electrons |
| More Details: |
We study the effects of static magnetic and electric fields on Kitaev's honeycomb model. Using the electric polarization operator appropriate for Kitaev materials, we derive the effective Hamiltonian for the emergent Majorana fermions to second-order in both the electric and magnetic fields. We find that while individually each perturbation does not qualitatively alter Kitaev spin liquid, the cross-term induces a finite chemical potential at each Dirac node, giving rise to a Majorana-Fermi surface. We argue this gapless phase is stable and exhibits typical metallic phenomenology, such as linear in temperature heat capacity and finite, but non-quantized, thermal Hall response. Finally, we speculate on the potential for realization of this physics in Kitaev materials.
Comment: 18 pages, 12 figures |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevB.103.134444 |
| Access URL: |
http://arxiv.org/abs/2010.11200 |
| Accession Number: |
edsarx.2010.11200 |
| Database: |
arXiv |
