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research article

Phase diagram of the J-Jd Heisenberg model on the maple leaf lattice: Neural networks and density matrix renormalization group

Beck, Jonas
•
Bodky, Jonathan
•
Motruk, Johannes
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May 10, 2024
Physical Review B

We microscopically analyze the nearest-neighbor Heisenberg model on the maple leaf lattice through neural quantum state (NQS) and infinite density matrix renormalization group (iDMRG) methods. Embarking to parameter regimes beyond the exact dimer singlet ground state with a dimer bond spin exchange coupling J(d) varied against the exchange strength J of all other bonds, the iDMRG (NQS) method finds a dimer state paramagnetic phase for J(d)/J > 1.464 (J(d)/J > 1.39) and a canted 120 degrees magnetic order for J(d)/J < 1.419 (J(d)/J < 1.23). Assessing training convergence inaccuracies of the NQS method and the influence of finite cylindric circumference in the iDMRG method, we discuss the possible existence of an intermediate phase between the magnet and the dimer paramagnet.

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Type
research article
DOI
10.1103/PhysRevB.109.184422
Web of Science ID

WOS:001236760700006

Author(s)
Beck, Jonas
•
Bodky, Jonathan
•
Motruk, Johannes
•
Mueller, Tobias
•
Thomale, Ronny
•
Ghosh, Pratyay  
Date Issued

2024-05-10

Publisher

Amer Physical Soc

Published in
Physical Review B
Volume

109

Issue

18

Article Number

184422

Subjects

Technology

•

Physical Sciences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CTMC  
FunderGrant Number

Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)

258499086-SFB 1170

SNSF Swiss Postdoctoral Fellowship

210478

Wuerzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat

390858490-EXC 2147

Available on Infoscience
June 19, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/208717
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