Document Detail

Pressure-driven quantum criticality in iron-selenide superconductors.
MedLine Citation:
PMID:  23003077     Owner:  NLM     Status:  In-Data-Review    
We report a finding of a pressure-induced quantum critical transition in K_{0.8}Fe_{x}Se_{2} (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.
Jing Guo; Xiao-Jia Chen; Jianhui Dai; Chao Zhang; Jiangang Guo; Xiaolong Chen; Qi Wu; Dachun Gu; Peiwen Gao; Lihong Yang; Ke Yang; Xi Dai; Ho-Kwang Mao; Liling Sun; Zhongxian Zhao
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Publication Detail:
Type:  Journal Article     Date:  2012-05-08
Journal Detail:
Title:  Physical review letters     Volume:  108     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  197001     Citation Subset:  IM    
Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China.
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