PIRSA:17060040 Conference Condensed Matter

DOI10.48660/17060040

Conference/School: International Workshop on Quantum Spin Ice

Onoda, S. (2017). Quantum spin ice under a [111] magnetic field: from pyrochlore to kagome. Perimeter Institute. https://pirsa.org/17060040

Onoda, Shigeki. Quantum spin ice under a [111] magnetic field: from pyrochlore to kagome. Perimeter Institute, Jun. 08, 2017, https://pirsa.org/17060040 

@misc{ pirsa_PIRSA:17060040,
  doi = {10.48660/17060040},
  url = {https://pirsa.org/17060040},
  author = {Onoda, Shigeki},
  keywords = {Condensed Matter},
  language = {en},
  title = {Quantum spin ice under a [111] magnetic field:  from pyrochlore to kagome},
  publisher = {Perimeter Institute},
  year = {2017},
  month = {jun},
  note = {PIRSA:17060040 see, \url{https://pirsa.org}}
}

Abstract

Quantum spin ice, modeled for magnetic rare-earth pyrochlores, has attracted great interest for hosting a U(1) quantum spin liquid, which involves spin-ice monopoles as gapped deconfined spinons, as well as gapless excitations analogous to photons. However, the global phase diagram under a [111] magnetic field remains open. Here we uncover by means of unbiased quantum Monte-Carlo simulations that a supersolid of monopoles, showing both a superfluidity and a partial ionization, intervenes the kagome spin ice and a fully polarized ionic monopole insulator, in contrast to classical spin ice where a direct discontinuous phase transition takes place. We also show that on cooling, kagome spin ice evolves towards a valence bond solid. Possible relevance to experiments is discussed.

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