Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 79, Issue 2, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.79.023706
Keywords
hole trapping; Kondo effect; La2-xSrxCu1-yNiyO4; specific heat; muon spin relaxation; quantum phase transition; phase separation
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Funding
- KEK-MSL
- Ministry of Education, Culture, Sports. Science and Technology, Japan
- Japan Society for the Promotion of Science
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The electronic ground state in high-T-c cuprates where the superconducting state is suppressed by Ni Substitution has been investigated in La2-xSrxCu1-yNiyO4 from the specific heat and muon spill relaxation measurements. It has been found that the ground state changes from a magnetically ordered state with the strong hole-trapping by Ni to a metallic state with the Kondo effect of Ni with increasing hole-concentration. Moreover, the analysis of the results has revealed that a phase separation into the magnetically ordered phase and the metallic phase occurs around the boundary of two phases.
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