Randomness-induced quantum spin liquid behavior in the $s=$1/2 bond-random Heisenberg antiferromagnet on the pyrochlore lattice

Kazuki Uematsu; Hikaru Kawamura

doi:10.1103/PhysRevLett.123.087201

Randomness-induced quantum spin liquid behavior in the $s=$1/2 bond-random Heisenberg antiferromagnet on the pyrochlore lattice

Strongly Correlated Electrons 2019-08-28 v3

Authors: Kazuki Uematsu , Hikaru Kawamura

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Abstract

We investigate the zero- and finite-temperature properties of the bond-random $s=1/2$ Heisenberg antiferromagnet on the pyrochlore lattice by the exact diagonalization and the Hams--de Raedt methods. We find that the randomness induces the gapless quantum spin liquid (QSL) state, the random-singlet state. Implications to recent experiments on the mixed-anion pyrochlore-lattice antiferromagnet Lu $_2$ Mo $_2$ O $_5$ N $_2$ exhibiting gapless QSL behaviors are discussed.

Keywords

quantum spin liquid bond-random heisenberg model pyrochlore lattice random singlet exact diagonalization gapless behavior

Cite

@article{arxiv.1901.10291,
  title  = {Randomness-induced quantum spin liquid behavior in the $s=$1/2 bond-random Heisenberg antiferromagnet on the pyrochlore lattice},
  author = {Kazuki Uematsu and Hikaru Kawamura},
  journal= {arXiv preprint arXiv:1901.10291},
  year   = {2019}
}

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