Linear temperature term of heat capacity in insulating and superconducting La-Ba-Cu-O systems

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概要

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• The heat capacity of La2-xBaxCuO4 was investigated between 0.8 and 10 K. The linear temperature term γT of the heat capacity is absent in the antiferromagnetic-ordered region of x≤0.02. γ increases abruptly from x=0.02 to x=0.04 where the system is still insulating at low temperature, and seems to saturate at the order of 5 mJ/mol K2 in the superconducting region of x≥0.05. The correlation between magnetic order and vanishing γT term and the existence of a finite γT term for Ba doping give support to the resonating-valence-bond picture.

• American Physical Societyの論文

著者

• Nakajima H

  Waseda Univ. Tokyo Jpn

• Kumagai K

  Hokkaido Univ. Sapporo Jpn

• Nakajima H.

  System Electronics Laboratories, Nippon Telegraph and Telephone Corporation

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