Fermi Surface Reconstruction inside the Hidden Order Phase of URu2Si2Probed by Thermoelectric Measurements

• DOI: 10.7566/jpsj.82.034706
• Publication Date: 2013-02-05T06:04:30Z
• Authors: Alexandre Pourret; Alexandra Palacio...; Steffen Krämer; Liam Malone; Marc Nardone; Dai Aoki; Georg Knebel; Jacques Flouquet
• Keywords: [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]; Condensed Matter - Strongly Correlated Electrons; Strongly Correlated Electrons (cond-mat.str-el); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences

We report thermoelectric measurements of the low carrier heavy fermion compound URu2Si2 at high fields up to 34T and at low temperatures down to 500mK. The field dependence of the thermoelectric power (TEP) and the Nernst signal shows successive anomalies deep inside the hidden order (HO) phase. The field position of these anomalies correspond to different changes in the Shubnikov-de Haas frequencies and effective masses around 12 T, 17 T, 23 T and 30 T. These results indicate successive reconstructions of the Fermi surface, which imply electronic phase transitions well within the HO phase.<br/>6 pages, 6 figures<br/>