TY - JOUR
T1 - Dynamical spin-orbital correlation in the frustrated magnet Ba 3 CuSb 2 O 9
AU - Ishiguro, Yuki
AU - Kimura, Kenta
AU - Nakatsuji, Satoru
AU - Tsutsui, Satoshi
AU - Baron, Alfred Q.R.
AU - Kimura, Tsuyoshi
AU - Wakabayashi, Yusuke
N1 - Funding Information:
We thank Professor H. Sawa, Dr N. Katayama, Professor M. Hagiwara, Professor S. Shimomura, Professor S. Ishihara, Dr J. Nasu, and Professor C. Broholm for valuable discussion. Mr R. Takahashi is also acknowledged for his help in the inelastic X-ray scattering experiment. This work was supported by KAKENHI (Grant No. 23684026) and the Global COE Programme (G10). The synchrotron radiation experiments at the Photon Factory and the SPring-8 were performed with the approval of the Photon Factory Programme Advisory Committee (Proposal No. 2012G091) and the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2011B1408), respectively.
PY - 2013
Y1 - 2013
N2 - At low temperatures, atomic magnetic moments usually exhibit some order, for example ferromagnetic order. An exception is frustrated magnets, in which the symmetry impedes the minimization of energy by pairwise magnetic interactions. In such frustrated magnets, new quantum phases, such as spin liquids, are expected. Theoretically, a quantum liquid based on the orbital degree of freedom has also been considered possible when spin and orbital degrees of freedom are entangled. However, to date, experimental observation of such a dynamic spin-orbital state has been a challenge. Here we report an X-ray scattering study of a dynamic spin-orbital state in the frustrated magnet Ba 3 CuSb 2 O 9. Orbital dynamical motion and increasing short-range orbital correlation with cooling are observed. The most significant feature is that the temperature variation of the orbital correlation is clearly affected by the magnetic interaction. This finding strongly supports a new quantum state in which spins and orbitals are entangled.
AB - At low temperatures, atomic magnetic moments usually exhibit some order, for example ferromagnetic order. An exception is frustrated magnets, in which the symmetry impedes the minimization of energy by pairwise magnetic interactions. In such frustrated magnets, new quantum phases, such as spin liquids, are expected. Theoretically, a quantum liquid based on the orbital degree of freedom has also been considered possible when spin and orbital degrees of freedom are entangled. However, to date, experimental observation of such a dynamic spin-orbital state has been a challenge. Here we report an X-ray scattering study of a dynamic spin-orbital state in the frustrated magnet Ba 3 CuSb 2 O 9. Orbital dynamical motion and increasing short-range orbital correlation with cooling are observed. The most significant feature is that the temperature variation of the orbital correlation is clearly affected by the magnetic interaction. This finding strongly supports a new quantum state in which spins and orbitals are entangled.
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U2 - 10.1038/ncomms3022
DO - 10.1038/ncomms3022
M3 - Article
C2 - 23771213
AN - SCOPUS:84879664661
SN - 2041-1723
VL - 4
JO - Nature Communications
JF - Nature Communications
M1 - 2022
ER -