Magneto-resistance quantum oscillations in a magnetic two-dimensional electron gas

Abstract

Magneto-transport 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.

8 pages, 6 figures

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• Fractional quantum Hall effect in CdTe
• Fractional Quantum Hall Effect in a Diluted Magnetic Semiconductor
• The effect of oscillating Fermi energy on the line shape of the Shubnikov-de Haas oscillation in a two dimensional electron gas
• Influence of the single-particle Zeeman energy on the quantum Hall ferromagnet at high filling factors
• Anomalous Resistance Ridges Along Filling Factor $\nu =4i$

Cited by in corpus (4)

• The role of electron confinement in Pd films for the oscillatory magnetic anisotropy in an adjacent Co layer
• Giant Shubnikov-de Haas Oscillations with V-Shaped Minima in a High-Mobility Two-Dimensional Electron Gas: Experiment and Phenomenological Model
• Conductance resonances and crossing of the edge channels in the quantum Hall ferromagnet state of Cd(Mn)Te microstructures
• Self-doped graphite nanobelts