検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

量子相転移近傍のまだらな電子状態

Mottled electronic state near a quantum critical phase transition

神戸 振作; 酒井 宏典; 徳永 陽

Kambe, Shinsaku; Sakai, Hironori; Tokunaga, Yo

単結晶YbRh$$_2$$Si$$_2$$サンプルで核磁気共鳴(NMR)スピン-格子緩和時間を測定し、フェルミと非フェルミ状態の共存状態を明らかにした。量子相転移点に近づくにつれて、非フェルミ状態がドミナントになる。そのようなまだらな状態は、CeやU系の重いフェルミオン状態では、2つの状態の交換が速いため、観測できなかったと考えられる。

By means of nuclear magnetic resonance (NMR) spin-lattice relaxation time measurements on a single crystal YbRh$$_2$$Si$$_2$$ sample, it is revealed that the coexisting Fermi and non-Fermi states appears near the quantum critical phase transition. Such a mottled state has remained hidden in Ce and U heavy fermion compounds, owing presumably to short lifetimes for the two states. Valence and magnetic instabilities are considered to occur at the same time around the quantum critical phase transition.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.