Emergence of higher order rotational symmetry in the hidden order phase of URuSi
Emergence of higher order rotational symmetry in the hidden order phase of URuSi
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URuSi 隐阶相中高阶旋转对称性的出现
DOI:
10.1080/14786435.2016.1235294
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发表时间:
2016
影响因子:
1.6
通讯作者:
Maple, M. B.
中科院分区:
文献类型:
--
作者:
Kanchanavatee, N.;Janoschek, M.;Huang, K.;White, B. D.;Riseborough, P. S.;Balatsky, A. V.;Maple, M. B.
Electrical resistivity measurements were performed as functions of temperature, magnetic field, and angle between the magnetic field and the c-axis of a URu Si single crystal. The resistivity exhibits a two-fold oscillation as a function of at high temperatures, which undergoes a 180-phase shift (sign change) with decreasing temperature at around 35 K. The hidden order transition is manifested as a minimum in the magnetoresistance and amplitude of the two-fold oscillation. Interestingly, the resistivity also showed four-fold, six-fold, and eight-fold symmetries at the hidden order transition. These higher order symmetries were also detected at low temperatures, which could be a sign of the formation of another pseudogap phase above the superconducting transition, consistent with recent evidence for a pseudogap from point-contact spectroscopy measurements and NMR. Measurements of the magnetisation of single crystalline URu Si with the magnetic field applied parallel and perpendicular to the crystallographic c-axis revealed regions with linear temperature dependencies between the hidden order transition temperature and about 25 K. This T-linear behaviour of the magnetisation may be associated with the formation of a precursor phase or ‘pseudogap’in the density of states in the vicinity of 30–35 K.
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DOI:
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发表时间:
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期刊:
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