TY - JOUR
T1 - Large negative quantum renormalization of excitation energies in the spin-1/2 kagome lattice antiferromagnet Cs2Cu3SnF 12
AU - Ono, Toshio
AU - Matan, Kittiwit
AU - Nambu, Yusuke
AU - Sato, Taku J.
AU - Katayama, Kazuya
AU - Hirata, Satoshi
AU - Tanaka, Hidekazu
PY - 2014/4/15
Y1 - 2014/4/15
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.83.043701
DO - 10.7566/JPSJ.83.043701
M3 - Article
AN - SCOPUS:84897481972
SN - 0031-9015
VL - 83
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 4
M1 - 043701
ER -