STM spectroscopy of (MDT-TTF)2AuI2

被引：2

作者：

Ichimura, K ^{[1
]}

Nomura, K

Nakamura, T

Takahashi, T

Hilti, B

Zambounis, JS

机构：

[1] Hokkaido Univ, Dept Phys, Sapporo 0600810, Japan

[2] Gakushuin Univ, Dept Phys, Tokyo 1710031, Japan

[3] Ciba Geigy AG, Cent Res Labs, CH-4000 Basel, Switzerland

来源：

SYNTHETIC METALS | 1999年 / 103卷 / 1-3期

关键词：

atomic force microscopy; scanning tunneling microscopy; superconducting phase transitions; organic superconductors;

D O I：

10.1016/S0379-6779(98)00243-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electron tunneling was performed on the superconducting phase of (MDT-TTF)(2)AuI2 using STM. The tunneling differential conductance at T=1.4 K shows the superconducting energy gap structure clearly. The conductance near zero bias voltage is well reduced while the enhancement at the gap edge is observed. The obtained gap Delta(0)=2 meV (2 Delta(0)/kT(c)=12) is larger than that of the weak coupling limit. The shape of the spectrum, which is different from the BCS density of states, suggests the gap anisotropy. The tunneling spectrum is explained by the d-wave. The conductance well above T-c, is flat. On the other hand, the pseudo gap like structure is observed near T-c.

引用

页码：1873 / 1876

页数：4

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