VALLEY SPLITTING AND g-FACTOR IN AlAs QUANTUM WELLS

被引：0

作者：

Duarte, C. A. ^{[1
]}

Gusev, G. M. ^{[2
]}

Lamas, T. E. ^{[2
]}

Bakarov, A. K. ^{[2
,3
]}

Portal, J. -C. ^{[4
,5
,6
]}

机构：

[1] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana, Brazil

[2] Univ Sao Paulo, Inst Fis, BR-05314970 Sao Paulo, Brazil

[3] Russian Acad Sci, Inst Semicond Phys, Novosibirsk 630090, Russia

[4] GHMFL CNRS, F-38042 Grenoble 9, France

[5] INSA Toulouse, F-31077 Toulouse 4, France

[6] Inst Univ France, Toulouse, France

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2009年 / 23卷 / 12-13期

关键词：

AlAs; valley splitting; g-factor; MAGNETIC-FIELD; COLLAPSE;

D O I：

10.1142/S0217979209062608

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Here we present the results of magneto resistance measurements in tilted magnetic field and compare them with calculations. The comparison between calculated and measured spectra for the case of perpendicular fields enable us to estimate the dependence of the valley splitting as a function of the magnetic field and the total Lande g-factor (which is assumed to be independent of the magnetic field). Since both the exchange contribution to the Zeeman splitting as well as the valley splitting are properties associated with the 2D quantum confinement, they depend only on the perpendicular component of the magnetic field, while the bare Zeeman splitting depends on the total magnetic field. This information aided by the comparison between experimental and calculated gray scale maps permits to obtain separately the values of the exchange and the bare contribution to the g-factor.

引用

页码：2948 / 2954

页数：7

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