Pressure-driven quantum criticality in iron-selenide superconductors.

Guo, Jing; Chen, Xiao-Jia; Dai, Jianhui; Zhang, Chao; Guo, Jiangang; Chen, Xiaolong; Wu, Qi; Gu, Dachun; Gao, Peiwen; Yang, Lihong; Yang, Ke; Dai, Xi; Mao, Ho-kwang; Sun, Liling; Zhao, Zhongxian

Guo, Jing; Chen, Xiao-Jia; Dai, Jianhui; Zhang, Chao; Guo, Jiangang; Chen, Xiaolong; Wu, Qi; Gu, Dachun; Gao, Peiwen; Yang, Lihong; Yang, Ke; Dai, Xi; Mao, Ho-kwang; Sun, Liling; Zhao, Zhongxian.

Afiliación

Guo J; Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China.

Phys Rev Lett ; 108(19): 197001, 2012 May 11.

Article en En | MEDLINE | ID: mdl-23003077

RESUMEN

We report a finding of a pressure-induced quantum critical transition in K0.8Fe(x)Se2 (x = 1.7 and 1.78) superconductors through in situ high-pressure electrical transport and x-ray diffraction measurements in diamond anvil cells. Transitions from metallic Fermi liquid behavior to non-Fermi liquid behavior and from antiferromagnetism to paramagnetism are found in the pressure range of 9.2-10.3 GPa, in which superconductivity tends to disappear. The change around the quantum critical point from the coexisting antiferromagnetism state and the Fermi liquid behavior to the paramagnetism state and the non-Fermi liquid behavior in the iron-selenide superconductors demonstrates a unique mechanism for their quantum critical transition.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2012 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos

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