OPTICAL CONDUCTIVITY OF C-AXIS ORIENTED YBA2CU3O6.70 - EVIDENCE FOR A PSEUDOGAP

被引：470

作者：

HOMES, CC ^{[1
]}

TIMUSK, T ^{[1
]}

LIANG, R ^{[1
]}

BONN, DA ^{[1
]}

HARDY, WN ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 2A6,BC,CANADA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.71.1645

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The c axis reflectance of high-quality single crystals of YBa2Cu3O6+x has been measured over a wide range of temperatures and frequencies. The x = 0.70 crystal has a pseudogap in the conductivity at 200 cm-1 which is present at room temperature. The gap deepens gradually as the temperature is lowered to 10 K with no discontinuity at T(c). In contrast, crystals with x = 0.95 show no gap in the normal state and their superconducting state is characterized by low-lying states. These observations are consistent with phase diagrams proposed to explain NMR and neutron data.

引用

页码：1645 / 1648

页数：4

共 31 条

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