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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/3327

Title: Spin splitting in InGaSb/InAlSb 2DEG having high indium content
Authors: Akabori, M
Sunouchi, T
Kakegawa, T
Sato, T
Suzuki, T
Yamada, S
Keywords: InGaSb/InAlSb two-dimensional electron gas (2DEG)
Zeeman spin splitting
Spin split vanishing
Zero-field spin splitting
Issue Date: 2006-08
Publisher: Elsevier
Magazine name: Physica E: Low-dimensional Systems and Nanostructures
Volume: 34
Number: 1-2
Start page: 413
End page: 416
DOI: 10.1016/j.physe.2006.03.012
Abstract: We formed a novel metamorphic InGaSb/InAlSb two-dimensional electron gas (2DEG) having high indium contents around 0.9 by molecular beam epitaxy (MBE), and investigated its spin splitting through magneto-resistance (MR) characteristics by using Hall-bar samples. We observed clear Shubnikov-de Haas (SdH) type MR oscillations with some peak splitting induced by the Zeeman-like spin splitting over B=1 T at 1.5K. An Estimated splitting energy, ΔE, was 9 meV at B=4 T for the Landau index, n=1. Moreover, we also observed no peak splitting, i.e. spin split vanishing around B=1 T. Additionally, we confirmed some SdH beat patterns due to the zero-field spin splitting less than B=1 T, and the splitting energy at B=0, ΔE_0, was estimated to be 4~6 meV from the SdH fast Fourier transform (FFT) analysis. We successfully demonstrated well fitting curves for the Landau plots of SdH peaks across B=1 T, thus the Zeeman-like splitting, the spin split vanishing, and the beat patterns due to the zero-field splitting can be connected, smoothly. The fitting curves were obtained by assuming not the Rashba effect but the Dresselhaus effect on the (001) surface with the confinement. Therefore, it suggests that the zero-field spin splitting in the present InGaSb/InAlSb 2DEG originates from the Dresselhaus effect.
Rights: Elsevier B.V., Masashi Akabori, Takashi Sunouchi, Tomoyasu Kakegawa, Taku Sato, Toshi-kazu Suzuki and Syoji Yamada, Physica E: Low-dimensional Systems and Nanostructures, 34(1-2), 2006, 413-416. http://www.sciencedirect.com/science/journal/13869477
URI: http://hdl.handle.net/10119/3327
Material Type: author
Appears in Collections:g10-1. 雑誌掲載論文 (Journal Articles)

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