Quantum Criticality in URhGe - UIrGe system

J. Pospisil; Y. Haga; S. Kambe; Y. Tokunaga; N. Tateiwa; D. Aoki; Y. Uwatoko; F. Honda; A. Nakamura; Y. Homma; E. Yamamoto; T. Yamamura

doi:10.11316/jpsgaiyo.71.2.0_1760

セッションID: 13aJD-10

DOI https://doi.org/10.11316/jpsgaiyo.71.2.0_1760

会議情報

主催: 一般社団法人日本物理学会

会議名: 2016年度日本物理学会秋季大会

開催日: 2016/09/13 - 2016/09/24

Quantum Criticality in URhGe - UIrGe system

J. Pospisil, Y. Haga, S. Kambe, Y. Tokunaga, N. Tateiwa, D. Aoki, Y. Uwatoko, F. Honda, A. Nakamura, Y. Homma, E. Yamamoto, T. Yamamura

著者情報

J. Pospisil
ASRC-JAEA
Y. Haga
ASRC-JAEA
S. Kambe
ASRC-JAEA
Y. Tokunaga
ASRC-JAEA
N. Tateiwa
ASRC-JAEA
D. Aoki
IMR Tohoku Univ.
Y. Uwatoko
The Univ. of Tokyo
F. Honda
IMR Tohoku Univ.
A. Nakamura
IMR Tohoku Univ.
Y. Homma
IMR Tohoku Univ.
E. Yamamoto
ASRC-JAEA
T. Yamamura
The Univ. of Tokyo

キーワード: f electron system, Actinide Compounds, Substitution and Impurity Effects, Pressure Effects, Heavy Fermions and Valence Fluctuations, Phase Transitions and Critical Phenomena

会議録・要旨集フリー

詳細

抄録

We have investigated field-temperature (B - T) phase diagram of UIr1-xRhxGe system with AFM/FM boundary. In a FM superconductor URhGe, the enhanced quantum tricritical fluctuations were reported. In contrast, along Rh doping in an AFM UIrGe, the usual quantum critical behavior is confirmed for the AFM/FM quantum critical point. We conclude that magnetic fluctuations in UIrGe are broken by opening of the AFM gap at TN. AFM gap closing and recovery of the magnetic fluctuations at low temperatures in UIrGe are expected by magnetic field along the b-axis at Bb,crit and by external pressure. We have emphasized a clear connection between the characteristic Tmax and metamagnetic field Bb,crit creating the Q-phase dome. We recognized presence of maximum at Tmax in static susceptibility Chib can be a good test of the criticality/tricriticality boundaries through the UCoGe - URhGe - UIrGe system.

責任著者(Corresponding author)

会議情報

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