Possible phase transition deep inside the hidden order phase of ultraclean URu2Si2

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

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number156403
JournalPhysical review letters
Volume102
Issue number15
DOIs
Publication statusPublished - 2009 Apr 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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