Absence of metal-insulator transition and coherent interlayer transport in oriented graphite in parallel magnetic fields

被引：41
|
作者：
Kempa, H
Semmelhack, HC
Esquinazi, P
Kopelevich, Y
机构：
[1] Univ Leipzig, Inst Expt Phys 2, Dept Superconduct & Magnetism, D-04103 Leipzig, Germany
[2] Univ Estadual Campinas, Inst Fis, BR-13083970 Campinas, SP, Brazil
来源：
SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
graphite; phase transitions; resistivity;
D O I：
10.1016/S0038-1098(02)00711-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Measurements of the magnetoresistivity of graphite with a high degree of control of the angle between the sample and magnetic field indicate that the metal-insulator transition, shown to be induced by a magnetic field applied perpendicular to the layers, does not appear in parallel field orientation. Furthermore, we show that interlayer transport is coherent in less ordered samples and high magnetic fields, whereas appears to be incoherent in less disordered samples. Our results demonstrate the two-dimensionality of the electron system in ideal graphite samples. (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码：1 / 5
页数：5
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