Volume-wise destruction of the antiferromagnetic Mott insulating state through quantum tuning

Benjamin A. Frandsen, Lian Liu, Sky C. Cheung, Zurab Guguchia, Rustem Khasanov, Elvezio Morenzoni, Timothy J.S. Munsie, Alannah M. Hallas, Murray N. Wilson, Yipeng Cai, Graeme M. Luke, Bijuan Chen, Wenmin Li, Changqing Jin, Cui Ding, Shengli Guo, Fanlong Ning, Takashi U. Ito, Wataru Higemoto, Simon J.L. BillingeShoya Sakamoto, Atsushi Fujimori, Taito Murakami, Hiroshi Kageyama, Jose Antonio Alonso, Gabriel Kotliar, Masatoshi Imada, Yasutomo J. Uemura

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

RENiO3 (RE=rare-earth element) and V2O3 are archetypal Mott insulator systems. When tuned by chemical substitution (RENiO3) or pressure (V2O3), they exhibit a quantum phase transition (QPT) between an antiferromagnetic Mott insulating state and a paramagnetic metallic state. Because novel physics often appears near a Mott QPT, the details of this transition, such as whether it is first or second order, are important. Here, we demonstrate through muon spin relaxation/rotation (μSR) experiments that the QPT in RENiO3 and V2O3 is first order: the magnetically ordered volume fraction decreases to zero at the QPT, resulting in a broad region of intrinsic phase separation, while the ordered magnetic moment retains its full value until it is suddenly destroyed at the QPT. These findings bring to light a surprising universality of the pressure-driven Mott transition, revealing the importance of phase separation and calling for further investigation into the nature of quantum fluctuations underlying the transition.

Original languageEnglish
Article number12519
JournalNature communications
Volume7
DOIs
Publication statusPublished - 2016 Aug 17

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Frandsen, B. A., Liu, L., Cheung, S. C., Guguchia, Z., Khasanov, R., Morenzoni, E., Munsie, T. J. S., Hallas, A. M., Wilson, M. N., Cai, Y., Luke, G. M., Chen, B., Li, W., Jin, C., Ding, C., Guo, S., Ning, F., Ito, T. U., Higemoto, W., ... Uemura, Y. J. (2016). Volume-wise destruction of the antiferromagnetic Mott insulating state through quantum tuning. Nature communications, 7, [12519]. https://doi.org/10.1038/ncomms12519