STM TUNNELING SPECTROSCOPY ON HIGH-TC SUPERCONDUCTORS

被引：4

作者：

HASEGAWA, T ^{[1
]}

NANTOH, M ^{[1
]}

OGINO, M ^{[1
]}

SUGAWARA, H ^{[1
]}

KAWASAKI, M ^{[1
]}

KOINUMA, H ^{[1
]}

KITAZAWA, K ^{[1
]}

机构：

[1] TOKYO INST TECHNOL,ENGN MAT RES LAB,YOKOHAMA,KANAGAWA 227,JAPAN

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1995年 / 8卷 / 04期

关键词：

SUPERCONDUCTING GAP; SYMMETRY OF ORDER PARAMETER;

D O I：

10.1007/BF00722832

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

STM tunneling spectroscopy has been performed on the bulk single crystals of BiSrCaCuO (BSCCO) and the epitaxial thin films of YBaCuO (YBCO) at cryogenic temperatures. The STM images and tunneling spectra observed on the (001) surfaces can be classified into three cases; 1) Atomic image is visible. However, the tunneling spectrum shows semiconducting or smeared superconducting gap structures, depending on the tip-sample distance. 2) Clear atomic image can not be obtained. But, the tunneling spectrum shows flat bottom region with quite low zero bias conductance. 3) Tunneling spectra demonstrate gapless behavior, independent of the tip-sample separation. These observations support the quasi-2D electronic picture in which a-wave like 2D superconducting layers are coupled with each other through the Josephson effect.

引用

页码：467 / 470

页数：4

共 12 条

[1] SCANNING TUNNELING SPECTROSCOPY ON HIGH-TC SUPERCONDUCTORS [J].