Topological Chiral and Nematic Superconductivity by Doping Mott Insulators on Triangular Lattice
Abstract
The mechanism of unconventional topological superconductivity (TSC) remains a long-standing issue. We investigate the quantum phase diagram of the extended t – J – Jχ model including spin chiral interactions on triangular lattice based on state-of-the-art density matrix renormalization group simulations. We identify distinct classes of superconducting phases characterized by nonzero topological Chern numbers C = 1 and 2 and a nematic d -wave superconducting phase with a zero Chern number. The TSC states are shown to emerge from doping either a magnetic insulator or chiral spin liquid, which opens new opportunities for experimental discovery. In addition, we further classify the C = 2 class of TSC phases into an isotropic and a nematic TSC phase and present evidence of continuous quantum phase transitions from the nematic TSC phase to both isotropic TSC and nematic d -wave phases. These results provide new insight into the mechanism of TSC with an emphasis on the role played by hole dynamics, which changes spin background and drives a topological phase transition at a hole doping level around 3% upon doping a magnetic insulator to enable the emergence of TSC.
- Publication Date:
- Research Org.:
- California State Univ. (CalState), Long Beach, CA (United States); California State University, Northridge (CSUN), CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1876141
- Alternate Identifier(s):
- OSTI ID: 1980371; OSTI ID: 2203463
- Grant/Contract Number:
- FG02-06ER46305
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 12 Journal Issue: 3; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; nematic order; topological superconductors; density matrix renormalization group
Citation Formats
Huang, Yixuan, and Sheng, D. N. Topological Chiral and Nematic Superconductivity by Doping Mott Insulators on Triangular Lattice. United States: N. p., 2022.
Web. doi:10.1103/PhysRevX.12.031009.
Huang, Yixuan, & Sheng, D. N. Topological Chiral and Nematic Superconductivity by Doping Mott Insulators on Triangular Lattice. United States. https://doi.org/10.1103/PhysRevX.12.031009
Huang, Yixuan, and Sheng, D. N. Thu .
"Topological Chiral and Nematic Superconductivity by Doping Mott Insulators on Triangular Lattice". United States. https://doi.org/10.1103/PhysRevX.12.031009.
@article{osti_1876141,
title = {Topological Chiral and Nematic Superconductivity by Doping Mott Insulators on Triangular Lattice},
author = {Huang, Yixuan and Sheng, D. N.},
abstractNote = {The mechanism of unconventional topological superconductivity (TSC) remains a long-standing issue. We investigate the quantum phase diagram of the extended t – J – Jχ model including spin chiral interactions on triangular lattice based on state-of-the-art density matrix renormalization group simulations. We identify distinct classes of superconducting phases characterized by nonzero topological Chern numbers C = 1 and 2 and a nematic d -wave superconducting phase with a zero Chern number. The TSC states are shown to emerge from doping either a magnetic insulator or chiral spin liquid, which opens new opportunities for experimental discovery. In addition, we further classify the C = 2 class of TSC phases into an isotropic and a nematic TSC phase and present evidence of continuous quantum phase transitions from the nematic TSC phase to both isotropic TSC and nematic d -wave phases. These results provide new insight into the mechanism of TSC with an emphasis on the role played by hole dynamics, which changes spin background and drives a topological phase transition at a hole doping level around 3% upon doping a magnetic insulator to enable the emergence of TSC.},
doi = {10.1103/PhysRevX.12.031009},
journal = {Physical Review. X},
number = 3,
volume = 12,
place = {United States},
year = {Thu Jul 14 00:00:00 EDT 2022},
month = {Thu Jul 14 00:00:00 EDT 2022}
}
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