Suppression of time-reversal symmetry breaking superconductivity in Pr(Os1-xRux)4Sb12 and Pr1-yLayOs4Sb12

被引：35

作者：

Shu, Lei ^{[1
,10
]}

Higemoto, W. ^{[2
]}

Aoki, Y. ^{[3
]}

Hillier, A. D. ^{[4
]}

Ohishi, K. ^{[2
]}

Ishida, K. ^{[5
]}

Kadono, R. ^{[6
]}

Koda, A. ^{[6
]}

Bernal, O. O. ^{[7
]}

MacLaughlin, D. E. ^{[8
]}

Tunashima, Y. ^{[3
]}

Yonezawa, Y. ^{[3
]}

Sanada, S. ^{[3
]}

Kikuchi, D. ^{[3
]}

Sato, H. ^{[3
]}

Sugawara, H. ^{[9
]}

Ito, T. U. ^{[2
]}

Maple, M. B. ^{[10
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

[2] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

[3] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

[4] STFC Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[5] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[6] KEK, Meson Sci Lab, Tsukuba, Ibaraki 3050801, Japan

[7] Calif State Univ Los Angeles, Dept Phys & Astron, Los Angeles, CA 90032 USA

[8] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[9] Univ Tokushima, Fac Integrated Arts & Sci, Tokushima 7708502, Japan

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

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 10期

基金：

美国国家科学基金会;

关键词：

CRYSTALLINE-ELECTRIC-FIELD; MUON SPIN RELAXATION; ZERO-FIELD; PROS4SB12; UPT3; PHASE;

D O I：

10.1103/PhysRevB.83.100504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zero-field muon spin relaxation experiments have been carried out in the Pr(Os1-xRux)(4)Sb-12 and Pr1-yLayOs4Sb12 alloy systems to investigate broken time-reversal symmetry (TRS) in the superconducting state, signaled by the onset of a spontaneous static local magnetic field B-s. In both alloy series B-s initially decreases linearly with solute concentration. Ru doping is considerably more efficient than La doping, with a similar to 50% faster initial decrease. The data suggest that broken TRS is suppressed for Ru concentration x greater than or similar to 0.6 but persists for essentially all La concentrations. Our data support a crystal-field excitonic Cooper pairing mechanism for TRS-breaking superconductivity.

引用

页数：4

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