Quantum-disordered state of magnetic and electric dipoles in an organic Mott system

M. Shimozawa, K. Hashimoto, A. Ueda, Y. Suzuki, K. Sugii, S. Yamada, Y. Imai, R. Kobayashi, K. Itoh, S. Iguchi, M. Naka, S. Ishihara, H. Mori, T. Sasaki, M. Yamashita

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Strongly enhanced quantum fluctuations often lead to a rich variety of quantum-disordered states. Developing approaches to enhance quantum fluctuations may open paths to realize even more fascinating quantum states. Here, we demonstrate that a coupling of localized spins with the zero-point motion of hydrogen atoms, that is, proton fluctuations in a hydrogen-bonded organic Mott insulator provides a different class of quantum spin liquids (QSLs). We find that divergent dielectric behavior associated with the approach to hydrogen-bond order is suppressed by the quantum proton fluctuations, resulting in a quantum paraelectric (QPE) state. Furthermore, our thermal-Transport measurements reveal that a QSL state with gapless spin excitations rapidly emerges upon entering the QPE state. These findings indicate that the quantum proton fluctuations give rise to a QSL-A quantum-disordered state of magnetic and electric dipoles-Through the coupling between the electron and proton degrees of freedom.

Original languageEnglish
Article number1821
JournalNature communications
Volume8
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Quantum-disordered state of magnetic and electric dipoles in an organic Mott system'. Together they form a unique fingerprint.

  • Cite this

    Shimozawa, M., Hashimoto, K., Ueda, A., Suzuki, Y., Sugii, K., Yamada, S., Imai, Y., Kobayashi, R., Itoh, K., Iguchi, S., Naka, M., Ishihara, S., Mori, H., Sasaki, T., & Yamashita, M. (2017). Quantum-disordered state of magnetic and electric dipoles in an organic Mott system. Nature communications, 8(1), [1821]. https://doi.org/10.1038/s41467-017-01849-x