STM spectroscopy on partially deuterated κ-(BEDT-TTF)2Cu[N(CN)2]Br

被引：4

作者：

Ichimura, K ^{[1
]}

Suzuki, K ^{[1
]}

Nomura, K ^{[1
]}

Kawamoto, A ^{[1
]}

机构：

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

来源：

SYNTHETIC METALS | 2003年 / 137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(02)01081-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the electron tunneling spectroscopy on kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br using a low temperature STM. Protonated d[0,0] and partially deuterated d[2,2] salts were studied.. In both salts, the functional shape of the tunneling differential conductance curve in the superconducting state is explained by the d-wave pairing symmetry. We obtain the gap parameter Delta as 2.1-3.9 and 3.0-4.8 meV for d[0,01 and d[2,21 salt, respectively. The value of 2Delta/kT(c) in d[2,2] salt is slightly larger than that in d[0,0] salt. The pseudogap is observed below about 50 K in both salts.

引用

页码：1229 / 1230

页数：2

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