Observation of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2

doi:10.1016/j.scib.2017.05.027

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Observation of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2
	Zhou, YZ; Jiang, S; Wu, Q; Sidorov, VA; Guo, J; Yi, W; Zhang, S; Wang, Z; Wang, HH; Cai, S; Yang, K; Jiang, S; Li, AG; Ni, N; Zhang, GM; Sun, LL; Zhao, ZX
	2017
Source Publication	SCIENCE BULLETIN
ISSN	2095-9273
Volume	62 Issue:12 Pages:857-862
Subtype	期刊论文
Abstract	One of the most strikingly universal features of the high-temperature superconductors is that the superconducting phase emerges in the close proximity of the antiferromagnetic phase, and the interplay between these two phases poses a long-standing challenge. It is commonly believed that, as the antiferromagnetic transition temperature is continuously suppressed to zero, there appears a quantum critical point, around which the existence of antiferromagnetic fluctuation is responsible for the development of the superconductivity. In contrast to this scenario, we report the observation of a bi-critical point identified at 2.88 GPa and 26.02 K in the pressurized high-quality single crystal Ca0.73La0.27FeAs2 by complementary in-situ high pressure measurements. At the critical pressure, we find that the antiferromagnetism suddenly disappears and superconductivity simultaneously emerges at almost the same temperature, and that the external magnetic field suppresses the superconducting transition temperature but hardly affects the antiferromagnetic transition temperature. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
Keyword	High-temperature Superconductivity
DOI	10.1016/j.scib.2017.05.027
WOS Keyword	HIGH-TEMPERATURE SUPERCONDUCTIVITY
Indexed By	SCI
Language	英语
WOS ID	WOS:000405586000009
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/28756
Collection	中科院上海应用物理研究所2011-2018年
Recommended Citation GB/T 7714	Zhou, YZ,Jiang, S,Wu, Q,et al. Observation of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2[J]. SCIENCE BULLETIN,2017,62(12):857-862.
APA	Zhou, YZ.,Jiang, S.,Wu, Q.,Sidorov, VA.,Guo, J.,...&Zhao, ZX.(2017).Observation of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2.SCIENCE BULLETIN,62(12),857-862.
MLA	Zhou, YZ,et al."Observation of a bi-critical point between antiferromagnetic and superconducting phases in pressurized single crystal Ca0.73La0.27FeAs2".SCIENCE BULLETIN 62.12(2017):857-862.

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