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Thermoelectric evidence for high-field anomalies in the hidden order phase of URu$$_2$$Si$$_2$$

隠れた秩序相における高磁場異常に関する熱電的証拠

Malone, L.*; 松田 達磨; Antunes, A.*; Knebel, G.*; Taufour, V.*; 青木 大*; Behnia, K.*; Proust, C.*; Flouquet, J.*

Malone, L.*; Matsuda, Tatsuma; Antunes, A.*; Knebel, G.*; Taufour, V.*; Aoki, Dai*; Behnia, K.*; Proust, C.*; Flouquet, J.*

Measurements of the thermoelectric coefficients of URu$$_2$$Si$$_2$$ in a high magnetic field could imply topological Fermi surface changes even deep inside the hidden order state. A change is observed in the thermopower as a function of the field applied parallel to the easy axis of magnetization, which could signify a change in the Fermi surface characteristics. The maximum of the thermopower coincides with previously measured anomalies in resistivity at $$H^*$$ = 23T. We analyze our results in terms of a Lifshitz transition in URu$$_2$$Si$$_2$$ originating from the hidden order Pauli depairing on a given subband.

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パーセンタイル:35.96

分野:Materials Science, Multidisciplinary

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