Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap Compound La4Ru2O10

D. Mandrus; P.G. Khalifah; S.J. Kim; S.J. Moon; T.W. Noh; W.S. Choi; Y.S. Lee

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Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap Compound La4Ru2O10

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arxiv 0707.1564 v1 pith:P3JS4HRN submitted 2007-07-11 cond-mat.str-el

Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap Compound La4Ru2O10

S.J. Moon , W.S. Choi , S.J. Kim , Y.S. Lee , P.G. Khalifah , D. Mandrus , T.W. Noh This is my paper

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keywords electronicopticalspinanisotropychangescompoundla4ru2o10quasi-two-dimensional

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We investigated the electronic response of the quasi-two-dimensional spin gap compound La4Ru2O10 using optical spectroscopy. We observed drastic changes in the optical spectra as the temperature decreased, resulting in anisotropy in the electronic structure of the spin-singlet ground state. Using the orbital-dependent hopping analysis, we found that orbital ordering plays a crucial role in forming the spin gap state in the non-one-dimensional material.

Orbital-Driven Electronic Structure Changes and the Resulting Optical Anisotropy of the Quasi-Two-Dimensional Spin Gap Compound La4Ru2O10

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