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Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2

Year: 2009
Type: article
Abstract: To elucidate the underlying nature of the hidden order (HO) state in heavy-fermion compound URu(2)Si(2), we measure electrical transport properties of ultraclean crystals in a high field, low temperature regime. Unlike previous studies, the present system with much less impurity scattering resolves a distinct anomaly of the Hall resistivity at H;{*} = 22.5 T, well below the destruction field of the HO phase = or approximately 36 T. In addition, a novel quantum oscillation appears above a magnetic field slightly below H;{*}. These results indicate an abrupt reconstruction of the Fermi surface, which implies a possible phase transition well within the HO phase caused by a band-dependent destruction of the HO parameter.
DOI: 10.1103/physrevlett.102.156403
Authors: H. Shishido, K. Hashimoto, T. Shibauchi, T. Sasaki, H. Oizumi, N. Kobayashi, T. Takamasu, K. Takehana, Y. Imanaka, T. D. Matsuda, Y. Haga, Y. Onuki, Y. Matsuda
Institutions: Kyoto University, Tohoku University, Institute for Materials Research, Tohoku University, National Institute for Materials Science, Japan Atomic Energy Agency, Advanced Science Research Center, The University of Osaka
Language: English
Open Access status: green
OpenAlex ID: W2071111145
FWCI: 4.307
Cites: 35
Cited by: 48
Related to: 10