Linear temperature term of heat capacity in insulating and superconducting La-Ba-Cu-O systems.
作者： K. Kumagai , Y. Nakamichi , I. Watanabe , Y. Nakamura , H. Nakajima
DOI: 10.1103/PHYSREVLETT.60.724
关键词:
摘要: The heat capacity of La/sub 2-//sub x/Ba/sub x/CuO/sub 4/ was investigated between 0.8 and 10 K. linear temperature term ..gamma..T the is absent in antiferromagnetic-ordered region xless than or equal to0.02. ..gamma.. increases abruptly from x = 0.02 to 0.04 where system still insulating at low temperature, seems saturate order 5 mJ/mol K/sup 2/ superconducting xgreater to0.05. correlation magnetic vanishing existence a finite for Ba doping give support resonating-valence-bond picture.
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