Hidden spin current in doped Mott antiferromagnets
Name
PhysRevB.98.165102.pdf
Size
722.57 KB
Format
Adobe PDF
Checksum (MD5)
f8385ee53fa4601f8e5a560b62f040e0
Author(s)
Zheng, Wayne
Zhu, Zheng
Sheng, D. N.
Weng, Zheng-Yu
Date Issued
October 2018
Journal
Physical Review B
Publisher
American Physical Society
Citation
Zheng, Wayne et al. "Hidden spin current in doped Mott antiferromagnets." Physical Review B 98, 16 (October 2018): 165102 © 2018 American Physical Society
Version
Final published version
Abstract
We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground state, which are concomitant with a nonzero total momentum or angular momentum associated with the doped hole. The latter determines a nontrivial ground state degeneracy. By further making superpositions of the degenerate ground states with zero or unidirectional spin currents, we show that different patterns of spatial charge and spin modulations will emerge. Such anomaly persists for the odd numbers of holes, but the spin current, ground state degeneracy, and charge/spin modulations completely disappear for even numbers of holes, with the two-hole ground state exhibiting a d-wave symmetry. An understanding of the spin current due to a many-body Berry-like phase and its influence on the momentum distribution of the doped holes will be discussed.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.98.165102
