@article{178af03e5cde456885d657cf995d67a4,
title = "Electron correlation and dynamical Jahn-Teller effect in an orbitally degenerate system",
abstract = "Motivated by recent experiments on Ba3CuSb2O9, we study the dynamical Jahn-Teller effect in a spin-orbital coupled system. We analyze a low-energy model Hamiltonian which includes the superexchange-type interaction and the Jahn-Teller interaction by using a combined method of the mean-field approximation and the quantum Monte-Carlo simulation. We find that magnetic orders do not appear in a wide parameter region and that the spin-dimer state with an orbital order is realized. The orbital order is strongly suppressed by the dynamical Jahn-Teller effect.",
keywords = "Dynamical Jahn-Teller effect, Jahn-Teller effect, Orbital degree of freedom, Spin liquid",
author = "Joji Nasu and Sumio Ishihara",
note = "Funding Information: The authors would like to thank S. Nakatsuji, H. Sawa and M. Hagiwara for the valuable discussions. This work was supported by KAKENHI from Ministry of Education, Culture, Sports, Science and Technology (MEXT), Tohoku University “Evolution” program, and Grand Challenges in Next-Generation Integrated Nanoscience. JN is supported by the global Center-of-Excellence program “Weaving Science Web beyond Particle-Matter Hierarchy” of MEXT, Japan. Parts of the numerical calculations were performed on the supercomputing systems in Institute of Solid State Physics, the University of Tokyo, and Kyoto University.",
year = "2013",
month = jul,
doi = "10.3938/jkps.62.2179",
language = "English",
volume = "62",
pages = "2179--2183",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "12",
}