STM spectroscopy of (BEDT-TTF)(2)Cu(NCS)(2)

被引：11

作者：

Ichimura, K ^{[1
]}

Arai, T ^{[1
]}

Nomura, K ^{[1
]}

Takasaki, S ^{[1
]}

Yamada, J ^{[1
]}

Nakatsuji, S ^{[1
]}

Anzai, H ^{[1
]}

机构：

[1] HIMEJI INST TECHNOL,DEPT MAT SCI,HYOGO 67812,JAPAN

来源：

PHYSICA C | 1997年 / 282卷

关键词：

D O I：

10.1016/S0921-4534(97)01133-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The superconducting phase of kappa-(BEDT-TTF)(2)Cu(NCS)(2) was investigated by the electron tunneling spectroscopy using low temperature STM. The tunneling differential conductance obtained at the b-c surface shows V-shaped gap structure consistent with the d-wave symmetry. The lateral surface of single crystals was also investigated. We found that the tunneling spectrum varies its shape depending on the tip direction. This indicates the gap anisotropy. Taking into account the k-dependence of the tunneling transition probability, the inplane anisotropy of the conductance is well explained by the d-wave symmetry with line nodes along the direction phi=45 degrees from the c-axis. The d-wave pairing is strongly suggested in this material.

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页码：1895 / 1896

页数：2

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