TY - JOUR
T1 - Possible phase transition deep inside the hidden order phase of ultraclean URu2Si2
AU - Shishido, H.
AU - Hashimoto, K.
AU - Shibauchi, T.
AU - Sasaki, T.
AU - Oizumi, H.
AU - Kobayashi, N.
AU - Takamasu, T.
AU - Takehana, K.
AU - Imanaka, Y.
AU - Matsuda, T. D.
AU - Haga, Y.
AU - Onuki, Y.
AU - Matsuda, Y.
PY - 2009/4/17
Y1 - 2009/4/17
N2 - To elucidate the underlying nature of the hidden order (HO) state in heavy-fermion compound URu2Si2, 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*=22.5T, well below the destruction field of the HO phase 36T. 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.
AB - To elucidate the underlying nature of the hidden order (HO) state in heavy-fermion compound URu2Si2, 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*=22.5T, well below the destruction field of the HO phase 36T. 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.
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U2 - 10.1103/PhysRevLett.102.156403
DO - 10.1103/PhysRevLett.102.156403
M3 - Article
AN - SCOPUS:67650489030
SN - 0031-9007
VL - 102
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 156403
ER -