Magnetoresistance quantum oscillations in a magnetic two-dimensional electron gas

被引：7

作者：

Kunc, J. ^{[1
,2
]}

Piot, B. A. ^{[1
]}

Maude, D. K. ^{[1
]}

Potemski, M. ^{[1
]}

Grill, R. ^{[2
]}

Betthausen, C. ^{[3
]}

Weiss, D. ^{[3
]}

Kolkovsky, V. ^{[4
]}

Karczewski, G. ^{[4
]}

Wojtowicz, T. ^{[4
]}

机构：

[1] CNRS UJF UPS INSA, LNCMI, F-38042 Grenoble, France

[2] Charles Univ Prague, Fac Math & Phys, Inst Phys, CR-12116 Prague, Czech Republic

[3] Univ Regensburg, Expt & Angew Phys, D-93040 Regensburg, Germany

[4] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 08期

关键词：

ANTIFERROMAGNETIC EXCHANGE; FIELD; SUSCEPTIBILITY; SEMICONDUCTORS; CD1-XMNXTE; TRANSPORT; HETEROSTRUCTURES; CONDUCTIVITY; LIMIT; IONS;

D O I：

10.1103/PhysRevB.92.085304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetotransport measurements of Shubnikov-de Haas (SdH) oscillations have been performed on two-dimensional electron gases (2DEGs) confined in CdTe and CdMnTe quantum wells. The quantum oscillations in CdMnTe, where the 2DEG interacts with magnetic Mn ions, can be described by incorporating the electron-Mn exchange interaction into the traditional Lifshitz-Kosevich formalism. The modified spin splitting leads to characteristic beating pattern in the SdH oscillations, the study of which indicates the formation of Mn clusters resulting in direct anti-ferromagnetic Mn-Mn interaction. The Landau-level broadening in this system shows a peculiar decrease with increasing temperature, which could be related to statistical fluctuations of the Mn concentration.

引用

页数：8

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