Electric transport character in the La0.7Ce0.3MnO3-SrTiO3-Nb heterojunction

被引：2
作者：
Sheng, ZG
Song, WH
Sun, YP [1 ]
Sun, JR
Shen, BG
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, State Key Lab Magnetism, Inst Phys, Beijing 100080, Peoples R China
[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 2006年 / 137卷 / 06期
基金：
中国国家自然科学基金;
关键词：
magnetically ordered materials; heterojunctions; tunneling;
D O I：
10.1016/j.ssc.2005.12.002
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The electric transport character in heterojunction composed of a La0.7CeO3MnO3 film and a 0.5 wt% Nb-doped SrTiO3 substrate (LCEM/STON) is investigated. It is found that the energy band gap (Eg) between LCEM and STON decreases with increasing temperatures. The most striking observation of present work is that there exists a variation of reverse transport mechanism from ionization to tunneling at the temperature of 175 K. We attribute the temperature dependence of reverse transport mechanism to co-work of E-g and the ferrornagnetic (FM) insulting phase in the heterojunction. These results are helpful in configuring artificial devices using manganites. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：292 / 295
页数：4
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