Unconventional T - H Phase Diagram in the Noncentrosymmetric Compound Yb2Fe12P7

被引：15

作者：

Baumbach, R. E. ^{[1
]}

Hamlin, J. J. ^{[1
]}

Shu, L. ^{[1
]}

Zocco, D. A. ^{[1
]}

O'Brien, J. R. ^{[2
]}

Ho, P. -C. ^{[3
]}

Maple, M. B. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Quantum Design, San Diego, CA 92121 USA

[3] Calif State Univ Fresno, Dept Phys, Fresno, CA 93740 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 10期

基金：

美国国家科学基金会;

关键词：

FERMI-LIQUID BEHAVIOR; ELECTRON; HEAVY; DISORDER;

D O I：

10.1103/PhysRevLett.105.106403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature-(T-)magnetic-field (H) phase diagram for the noncentrosymmetric compound YbFeP, determined from electrical resistivity (rho), specific heat (C), and magnetization (M) measurements on single crystal specimens, is reported. This system exhibits a crossover from a magnetically ordered non-Fermi-liquid (NFL) phase at low H to another NFL phase at higher H. The crossover occurs near the value of H where the magnetic ordering temperature (T-M) is no longer observable in C(T, H)/T and rho(T, H), but not where T-M extrapolates smoothly to T = 0 K at a possible quantum critical point (QCP). This indicates the occurrence of a quantum phase transition between the two NFL phases. The lack of a clear relationship between the extrapolated QCP and NFL behavior suggests an unconventional route to the NFL ground states.

引用

页数：4

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