Field dependence of the specific heat of single-crystal HgBa2Ca2Cu3O8+delta

被引：16

作者：

Carrington, A ^{[1
]}

Marcenat, C ^{[1
]}

Bouquet, F ^{[1
]}

Colson, D ^{[1
]}

Bertinotti, A ^{[1
]}

Marucco, JF ^{[1
]}

Hammann, J ^{[1
]}

机构：

[1] CEA SACLAY, SERV PHYS ETAT CONDENSE, F-91191 GIF SUR YVETTE, FRANCE

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.55.R8674

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a sensitive sc technique, we have measured the specific heat (C) of a small single crystal of HgBa2Ca2Cu3O8+delta in fields up to 7 T. In zero field the superconducting anomaly has the form of a quasilogarithmic peak, which is almost symmetric about T-c. In increasing fields the anomaly is strongly suppressed and is shifted to lower temperatures (with a slope of similar to -0.8 K/T). This unusual behavior is qualitatively different from that of YBa2Cu3O6.95, and seems to be intrinsic to the quasi-two-dimensional, high-T-c superconductors. We find that the three-dimensional XY model of critical fluctuations best describes our data.

引用

页码：R8674 / R8677

页数：4

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