CORRELATION EFFECT ON HOPPING CONDUCTION IN A MAGNETIC-FIELD

被引：8

作者：

ETO, M

机构：

[1] Department of Physics, Faculty of Science and Technology, Keio University, Kohoku-ku, Yokohama 223

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.48.4933

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Both the correlation effect and the interference effect are taken into account in hopping conduction in the strongly Anderson-localized regime. A new mechanism for the positive magnetoconductance is suggested: the Zeeman effect increases the number of high-spin states, in which the orbitals at the Fermi level are more extended than in the low-spin states owing to the weaker short-range correlation effect. The magnetoconductance is independent of the direction of the magnetic field and can be observed in nearest-neighbor hopping conduction.

引用

收藏

页码：4933 / 4936

页数：4

相关论文

共 26 条

[1] LOW-TEMPERATURE MAGNETIC-SUSCEPTIBILITY OF SI-P IN THE NON-METALLIC REGION [J].

ANDRES, K ;

BHATT, RN ;

GOALWIN, P ;

RICE, TM ;

WALSTEDT, RE .

PHYSICAL REVIEW B, 1981, 24 (01) :244-260

[2] MAGNETIC-PROPERTIES OF DOPED SEMICONDUCTORS [J].

BHATT, RN .

PHYSICA SCRIPTA, 1986, T14 :7-16

[3]

BUTCHER PN, 1986, CRYSTALLINE SEMICOND, P305

[4]

Efros A. L., 1985, Electron-electron interactions in disordered systems, P409

[5] ORBITAL MAGNETOCONDUCTANCE IN THE VARIABLE-RANGE-HOPPING REGIME [J].

ENTINWOHLMAN, O ;

IMRY, Y ;

SIVAN, U .

PHYSICAL REVIEW B, 1989, 40 (12) :8342-8348

[6]

ETO M, 1990, ADV DISORD, V2, P111

[7] NEW THEORETICAL METHOD FOR STRONGLY CORRELATED RANDOM-SYSTEMS AND APPLICATION TO ANDERSON-LOCALIZED STATES IN SI-P [J].

ETO, M ;

KAMIMURA, H .

PHYSICAL REVIEW LETTERS, 1988, 61 (24) :2790-2793

[8] STUDIES OF THE CORRELATION EFFECT ON THE ANDERSON-LOCALIZED STATES IN SI-P BY THE MCSCF METHOD .1. UNCOMPENSATED CASE [J].

ETO, M ;

KAMIMURA, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1989, 58 (08) :2826-2835

[9] NEGATIVE MAGNETORESISTANCE IN THE ANDERSON LOCALIZED STATES [J].

FUKUYAMA, H ;

YOSIDA, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1979, 46 (01) :102-105

[10] HOPPING MAGNETOCONDUCTION AND THE RANDOM STRUCTURE IN QUASI ONE-DIMENSION INVERSION-LAYERS [J].

KALIA, RK ;

XUE, WG ;

LEE, PA .

PHYSICAL REVIEW LETTERS, 1986, 57 (13) :1615-1618