Similarity of the Fermi surface in the hidden order state and in the antiferromagnetic state of URu2Si2

E. Hassinger, G. Knebel, T. D. Matsuda, D. Aoki, V. Taufour, J. Flouquet

Research output: Contribution to journalArticlepeer-review

110 Citations (Scopus)

Abstract

Shubnikov-de Haas measurements of high quality URu2Si 2 single crystals reveal two previously unobserved Fermi surface branches in the so-called hidden order phase. Therefore, about 55% of the enhanced mass is now detected. Under pressure in the antiferromagnetic state, the Shubnikov-de Haas frequencies for magnetic fields applied along the crystalline c axis show little change compared with the zero pressure data. This implies a similar Fermi surface in both the hidden order and antiferromagnetic states, which strongly suggests that the lattice doubling in the antiferromagnetic phase due to the ordering vector QAF=(001) already occurs in the hidden order. These measurements provide a good test for existing or future theories of the hidden order parameter.

Original languageEnglish
Article number216409
JournalPhysical review letters
Volume105
Issue number21
DOIs
Publication statusPublished - 2010 Nov 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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