Magnetization measurements of magnetic two-dimensional electron gases

Magnetization measurements of magnetic two-dimensional electron gases
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DOI:
10.1103/physrevlett.86.4644
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发表时间:
2001-05-14
影响因子:
8.6
通讯作者:
Awschalom, DD
Awschalom, DD
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Harris, JGE;Knobel, R;Awschalom, DD

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我们直接测量了(Zn,Cd,Mn)Se二维电子气体(2DEGs)中传导电子和Mn(2+)离子的磁化强度,将它们集成到超灵敏的微机械磁力计中。在这些磁性2deg中,自旋和轨道能量之间的相互作用导致了费米能量处的朗道能级简并。这些朗道水平交叉导致了德哈斯-范阿尔芬振荡的新特征,这些特征可以通过一个简单的模型定量地再现。
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.