Crystalline Electric Field Effects and Hidden Order in URu2Si2
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概要
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We show that an antiferro-octupole order of E_{\text{u}}(x(y^{2}-z^{2}), y(z^{2}-x^{2})) symmetry accounts for the rotational symmetry (RS) reduction of the basal plane magnetic susceptibility in the hidden order (HO) phase of URu2Si2. We determine the crystalline electric field level scheme with lower singlet-doublet levels, which can stabilize the E_{\text{u}} octupole order, as well as the quadrupole order of E_{\text{g}}(yz, zx) symmetry. Both orders can explain the RS reduction, but the octupole order breaks the time reversal symmetry, in agreement with the ligand NMR measurements, while the quadrupole order does not. Consequently, the E_{\text{u}} octupole order is favorable for the HO of URu2Si2.
- 2012-11-15
著者
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Hanzawa Katsurou
Department Of Physics Faculty Of Science And Technology Science University Of Tokyo
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Hanzawa Katsurou
Department of Physics, Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
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