Magnetization measurements of magnetic two-dimensional electron gases

被引：55

作者：

Harris, JGE

Knobel, R

Maranowski, KD

Gossard, AC

Samarth, N

Awschalom, DD ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.86.4644

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We directly measure the magnetization of both the conduction electrons and Mn(2+) ions in (Zn,Cd,Mn)Se two-dimensional electron gases (2DEGs) by integrating them into ultrasensitive micromechanical magnetometers. The interplay between spin and orbital energy in these magnetic 2DEGs causes Landau level degeneracies at the Fermi energy. These Landau level crossings result in novel features in the de Haas-van Alphen oscillations, which are quantitatively reproduced by a simple model.

引用

收藏

页码：4644 / 4647

页数：4

相关论文

共 24 条

[1] Spin dynamics and quantum transport in magnetic semiconductor quantum structures [J].

Awschalom, DD ;

Samarth, N .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :130-147

[2]

CROOKER SA, 1998, THESIS U CALIFORNIA

[3] Torsional oscillator magnetometer for high magnetic fields [J].

Crowell, PA ;

Madouri, A ;

Specht, M ;

Chaboussant, G ;

Mailly, D ;

Levy, LP .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1996, 67 (12) :4161-4166

[4] DENSITY OF STATES AND DEHAAS-VANALPHEN EFFECT IN TWO-DIMENSIONAL ELECTRON-SYSTEMS [J].

EISENSTEIN, JP ;

STORMER, HL ;

NARAYANAMURTI, V ;

CHO, AY ;

GOSSARD, AC ;

TU, CW .

PHYSICAL REVIEW LETTERS, 1985, 55 (08) :875-878

[5]

ENSSLIN K, 1992, PHYS REV B, V45, P11417

[6] MAGNETO-OPTICAL PROPERTIES OF LARGE-GAP DILUTED MAGNETIC SEMICONDUCTORS [J].

GAJ, JA .

SEMICONDUCTORS AND SEMIMETALS, 1988, 25 (0C) :275-309

[7] QUANTUM HALL-EFFECT IN IN0.53GA0.47AS-INP HETEROJUNCTIONS WITH 2 POPULATED ELECTRIC SUBBANDS [J].

GULDNER, Y ;

VIEREN, JP ;

VOOS, M ;

DELAHAYE, F ;

DOMINGUEZ, D ;

HIRTZ, JP ;

RAZEGHI, M .

PHYSICAL REVIEW B, 1986, 33 (06) :3990-3993

[8] Landau level mixing and levitation of extended states in two dimensions [J].

Haldane, FDM ;

Yang, K .

PHYSICAL REVIEW LETTERS, 1997, 78 (02) :298-301

[9] Magnetization and dissipation measurements in the quantum Hall regime using an integrated micromechanical magnetometer [J].

Harris, JGE ;

Awschalom, DD ;

Maranowski, KD ;

Gossard, AC .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :5102-5104

[10] Integrated micromechanical cantilever magnetometry of Ga1-xMnxAs [J].

Harris, JGE ;

Awschalom, DD ;

Matsukura, F ;

Ohno, H ;

Maranowski, KD ;

Gossard, AC .

APPLIED PHYSICS LETTERS, 1999, 75 (08) :1140-1142