Publication:
Large negative quantum renormalization of excitation energies in the spin-1/2 kagome lattice antiferromagnet Cs<inf>2</inf>Cu<inf>3</inf>SnF<inf>12</inf>

Issued Date

2014-04-15

Resource Type

Article

ISSN

13474073
00319015

DOI

10.7566/JPSJ.83.043701

Other identifier(s)

2-s2.0-84897481972

Rights

Mahidol University

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SCOPUS

Bibliographic Citation

Journal of the Physical Society of Japan. Vol.83, No.4 (2014)

Suggested Citation

Toshio Ono, Kittiwit Matan, Yusuke Nambu, Taku J. Sato, Kazuya Katayama, Satoshi Hirata, Hidekazu Tanaka Large negative quantum renormalization of excitation energies in the spin-1/2 kagome lattice antiferromagnet Cs<inf>2</inf>Cu<inf>3</inf>SnF<inf>12</inf>. Journal of the Physical Society of Japan. Vol.83, No.4 (2014). doi:10.7566/JPSJ.83.043701 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/34927

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Title

Large negative quantum renormalization of excitation energies in the spin-1/2 kagome lattice antiferromagnet Cs<inf>2</inf>Cu<inf>3</inf>SnF<inf>12</inf>

Author(s)

Toshio Ono
 Kittiwit Matan
 Yusuke Nambu
 Taku J. Sato
 Kazuya Katayama
 Satoshi Hirata
 Hidekazu Tanaka

Other Contributor(s)

Osaka Prefecture University
 Mahidol University
 ThEP
 Tohoku University
 Tokyo Institute of Technology

Abstract

Magnetic excitations in the spin-1/2 distorted kagome lattice antiferromagnet Cs2Cu3SnF12, which has an ordered ground state owing to the strong Dzyaloshinskii-Moriya interaction, were studied using inelastic neutron scattering. Although the spin-wave dispersion can be qualitatively understood in terms of linear spin-wave theory (LSWT), the excitation energies are renormalized by a factor of approximately 0.6 from those calculated by LSWT, almost irrespective of the momentum transfer. This inadequacy of LSWT, which is attributed to quantum fluctuations, provides evidence of negative quantum renormalization in the spin-1/2 kagome lattice antiferromagnet. © 2014 The Physical Society of Japan.

Keyword(s)

Physics and Astronomy

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https://repository.li.mahidol.ac.th/handle/20.500.14594/34927

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