Photoemission Imaging of 3D Fermi Surface Pairing at the Hidden Order Transition in URu2Si2

Eric D. Bauer; Jian-Qiao Meng; John A. Mydosh; John J. Joyce; Krzysztof Gofryk; Peter M. Oppeneer; Peter S. Riseborough; Tomasz Durakiewicz; Yinwan Li

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Photoemission Imaging of 3D Fermi Surface Pairing at the Hidden Order Transition in URu2Si2

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arxiv 1302.4508 v1 pith:ZRZMZPCA submitted 2013-02-19 cond-mat.str-el

Jian-Qiao Meng , Peter M. Oppeneer , John A. Mydosh , Peter S. Riseborough , Krzysztof Gofryk , John J. Joyce , Eric D. Bauer , Yinwan Li

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Tomasz Durakiewicz

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keywords fermihiddenorderpairingphotoemissionsurfaceuru2si2angle-resolved

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We report angle-resolved photoemission spectroscopy (ARPES) experiments probing deep into the hidden order (HO) state of URu2Si2, utilizing tunable photon energies with sufficient energy and momentum resolution to detect the near Fermi surface (FS) behavior. Our results reveal: (i) the full itinerancy of the 5f electrons; (ii) the crucial three-dimensional (3D) k-space nature of the FS and its critical nesting vectors, in good comparison with density-functional theory calculations, and (iii) the existence of hot-spot lines and pairing of states at the FS, leading to FS gapping in the HO phase.

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