Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session N16: Microscopic Theories of Superconductors II
11:30 AM–2:30 PM,
Wednesday, March 6, 2024
Room: M100G
Sponsoring
Unit:
DCMP
Chair: Olivier Gingras, Center for Computational Quantum Physics, Flatiron Institute
Abstract: N16.00014 : Intertwined Orders, Pair-Density-Wave, and D-Wave Superconductivity in the Square-Lattice t-J Model*
2:06 PM–2:18 PM
Presenter:
Feng Chen
(California State University, Northridge)
Authors:
Feng Chen
(California State University, Northridge)
Donna Sheng
(California State University, Northridge)
more than three decades of intense theoretical investigations, it remains illusive whether its ground state hosts
unconventional superconductivity (SC). Through state-of-the-art density matrix renormalization group calcula-
tions using the grand canonical ensemble and extremely large bond dimensions, we establish the ground-state
phase diagram of the square lattice t-J model. On 8-leg cylinders approximating two-dimensional systems,
we demonstrate that the pure t-J model, for a wide range of hole doping (δ = 0.1 − 0.2), hosts an exotic
SC state where the unidirectional pair density wave and d-wave SC intertwine with the spin bond order and a
weak charge density wave. We reveal a simple mechanism for SC in the family of t-J models, in which the
nearest-neighbor hopping plays an essential role in driving the formation of Cooper pairs with real-space sign
oscillations balancing the competition between the kinetic and exchange energies. Furthermore, a small
next-nearest-neighbor hopping t2 suppresses the spin bond order and pair density wave, leading to a d-wave
SC phase in both electron- and hole-doped systems. Our work supports the t-J model as a proper platform for
describing fundamental physics of cuprate superconductors.
*This work was supported by the U.S. Department of En-ergy, Office of Basic Energy Sciences under Grant No. DE-FG02-06ER46305 (FC, DNS) for computational study, andNational Science Foundation (NSF) Princeton Center forComplex Materials, a Materials Research Science and En-gineering Center DMR-2011750 (FDMH). D.N.S. also ac-knowledges partial support from NSF Partnership in Researchand Education in Materials DMR-1828019 for her travel andcollaboration at Princeton, where part of theoretical analysis was carried out
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700