Time-reversal symmetry breaking superconducting ground state in the doped Mott insulator on the honeycomb lattice
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Gu-2013-Time-reversal symmetry breaking.pdf
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Author(s)
Gu, Zheng-Cheng
Jiang, Hong-Chen
Sheng, D. N.
Yao, Hong
Balents, Leon
Wen, Xiao-Gang
Date Issued
October 2013
Journal
Physical Review B
Publisher
American Physical Society
Citation
Gu, Zheng-Cheng, Hong-Chen Jiang, D. N. Sheng, Hong Yao, Leon Balents, and Xiao-Gang Wen. “Time-Reversal Symmetry Breaking Superconducting Ground State in the Doped Mott Insulator on the Honeycomb Lattice.” Phys. Rev. B 88, no. 15 (October 2013). © 2013 American Physical Society
Version
Final published version
Abstract
The emergence of superconductivity in doped Mott insulators has been debated for decades. In this paper, we report the theoretical discovery of a time-reversal symmetry breaking superconducting ground state in the doped Mott insulator (described by the well known t-J model) on honeycomb lattice, based on a recently developed variational method: the Grassmann tensor product state approach. As a benchmark, we use exact diagonalization and density-matrix renormalization methods to check our results on small clusters. We find systematic consistency for the ground-state energy as well as other physical quantities, such as the staggered magnetization. At low doping, the superconductivity coexists with antiferromagnetic ordering.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.88.155112
