Superconductivity in the vicinity of antiferromagnetic order in CrAs

被引：209

作者：

Wu, Wei ^{[1
,2
]}

Cheng, Jinguang ^{[1
,2
,3
]}

Matsubayashi, Kazuyuki ^{[3
]}

Kong, Panpan ^{[1
,2
]}

Lin, Fukun ^{[1
,2
]}

Jin, Changqing ^{[1
,2
,4
]}

Wang, Nanlin ^{[1
,2
,4
,5
]}

Uwatoko, Yoshiya ^{[3
]}

Luo, Jianlin ^{[1
,2
,4
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[4] Collaborat Innovat Ctr Quantum Matter, Beijing, Peoples R China

[5] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

基金：

美国国家科学基金会;

关键词：

ELECTRONIC-STRUCTURE; MAGNETIC-PROPERTIES; PHASE-TRANSITION;

D O I：

10.1038/ncomms6508

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

One of the common features of unconventional superconducting systems such as the heavy-fermion, high transition-temperature cuprate and iron-pnictide superconductors is that the superconductivity emerges in the vicinity of long-range antiferromagnetically ordered state. In addition to doping charge carriers, the application of external pressure is an effective and clean approach to induce unconventional superconductivity near a magnetic quantum critical point. Here we report on the discovery of superconductivity on the verge of antiferromagnetic order in CrAs via the application of external pressure. Bulk superconductivity with T-c approximate to 2 K emerges at the critical pressure P-c approximate to 8 kbar, where the first-order antiferromagnetic transition at T-N approximate to 265 K under ambient pressure is completely suppressed. The close proximity of superconductivity to an antiferromagnetic order suggests an unconventional pairing mechanism for CrAs. The present finding opens a new avenue for searching novel superconductors in the Cr and other transition metal-based systems.

引用

页数：5

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