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The surface state of URu2Si2 |
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| Authors: | FL Boariu A Nuber M Klein P Lejay |
| Institution: | a Lehrstuhl für Experimentelle Physik VII, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany b CSNSM, Université Paris-Sud and CNRS/IN2P3, Bâtiments 104 et 108, 91405 Orsay cedex, France c Laboratoire Photons et Matière, UPR-5 CNRS, ESPCI, 10 rue Vanquelin, 75231 Paris Cedex 5, France d Institut Néel, CNRS/UJF, B.P. 166, 38042 Grenoble Cedex 9, France e Forschungszentrum Karlsruhe, Gemeinschaftslabor für Nanoanalythik, D-76021 Karlsruhe, Germany |
| Abstract: | The ‘hidden-order’ (HO) transition of URu2Si2 remains a puzzle after 25 years of research. Using high-resolution angle-resolved photoemission spectroscopy (ARPES) we found that a hole-like band around Γ having its band maximum at E = −35 meV, and previously thought to be a bulk band of the system, is indeed a surface state not related to the HO phase transition. Here we present our detailed investigations to assign that state to a surface feature, and discuss on the possible origins of this surface band. |
| Keywords: | URu2Si2 Heavy fermions f-Electron systems Surface states Surface degradation High-resolution ARPES |
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