Fermi surface and heavy quasi-particles of URu2Si2

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:177

Article; Proceedings Paper

Keller, N ; Wiegers, SAJ ; Perenboom, JAAJ ; de Visser, A ; Menovsky, AA ; Franse, JJM

关键词: heavy fermions;    Fermi surface;    magnetoresistance;    Shubnikov de Haas effect;    URu2Si2;   

DOI  :  10.1016/S0304-8853(97)00685-9

来源: Elsevier

【 摘 要 】

We present Shubnikov-de Haas measurements performed on two samples of URu2Si2 (I parallel to c end I parallel to a) in magnetic fields up to 24 T and at temperatures down to 60 mK. Four different energy bands could be determined between the [0 0 1]-[1 0 0] and the [1 0 0]-[1 1 0] directions of the tetragonal structure. Their corresponding cyclotron masses range between 5.8m(e) and 13.0m(e). The measured Fermi surface is compared to available band structure calculations. Surprisingly, for magnetic fields oriented in the tetragonal plane, a nonlinear splitting of the 1.2 kT frequency could be discerned in the field range between 17 and 21 T. (C) 1998 Elsevier Science B.V. All rights reserved.

【 授权许可】

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