2-DIMENSIONAL LASER MOLECULAR-BEAM EPITAXY AND CARRIER MODULATION OF INFINITE-LAYER BACUO2 FILMS

被引：31

作者：

MAEDA, T

YOSHIMOTO, M

SHIMOZONO, K

KOINUMA, H

机构：

[1] Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, 226

来源：

PHYSICA C | 1995年 / 247卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(95)00067-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

BaCuO2 thin films were fabricated on SrTiO3 substrates by laser MBE to elucidate the conditions for two-dimensional heteroepitaxial growth of the infinite-layer structure. The fine streak pattern and intensity oscillations observed by in situ reflection high-energy electron diffraction (RHEED) verified that tetragonal BaCuO2 (001) was grown in a two-dimensional unit cell-by-cell mode. Effective carrier injection into the BaCuO2 films was investigated in two different modes, i.e. homogeneous and molecular-layer dopings. In the former mode, 1 mol% of Ba was substituted to form a (Na-0.01, Ba-0.99)CuO2 film. In the latter, BaCuO2 and (Na-0.01, Ba-0.99)CuO2 molecular layers were alternately deposited to form carrier modulated multilayered films. Both homogeneous BaCuO2 and (Na-0.01, films were semiconductive, whereas the carrier modulated multilayered films turned out to be metallic without showing any indication of superconductivity at 4 K and above.

引用

页码：142 / 146

页数：5

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