SUPERCONDUCTIVITY AND TRANSPORT-PROPERTIES IN ULTRATHIN EPITAXIAL SINGLE-CRYSTAL NIOBIUM FILMS

被引：11

作者：

JIANG, QD

XIE, YL

ZHANG, WB

GU, H

YE, ZY

WU, K

ZHANG, JL

LI, CY

YIN, DL

机构：

[1] Dept. of Phys., Peking Univ.

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 15期

关键词：

D O I：

10.1088/0953-8984/2/15/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Pure and high-quality single-crystal Nb(001) thin films with thicknesses ranging from 40 AA to 1000 AA were grown epitaxially on NaCl(001) substrates by an UHV E-beam evaporation technique. TEM observations, resistivity and superconducting transition temperature measurements were carried out. A drastic fall-off in transition temperature and conductivity was observed in ultrathin single-crystal Nb films. The results are discussed within the framework of the existing theories and a strain-induced 'double-layer' model is proposed. Data for polycrystalline Nb thin films on glass substrates deposited under exactly the same evaporation conditions as the single-crystal films are also presented for comparison.

引用

页码：3567 / 3578

页数：12

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