Enhancement and anisotropy of the Landaugfactor in modulation-doped Al0.22Ga0.78N/GaN heterostructures

Autor:	J.-M. Liu, K. Hoshino, Yi Shi, Ben Shen, Z. W. Zheng, Y. S. Gui, C. P. Jiang, Z. J. Qiu, H. M. Zhou, Shaoling Guo, Y. Arakawa, Rui Zhang, N. Tang, Junhao Chu, Youdou Zheng, D. J. Chen
Rok vydání:	2004
Předmět:	Physics Condensed matter physics Electric field g factor Exchange interaction General Physics and Astronomy Landau quantization Fermi gas Anisotropy Shubnikov–de Haas effect Magnetic field
Zdroj:	Journal of Applied Physics. 95:2473-2476
ISSN:	1089-7550 0021-8979
Popis:	Spin splitting of the two-dimentional electron gas (2DEG) in modulation-doped Al0.22Ga0.78N/GaN heterostructures has been studied by means of magnetotransport measurements at low temperatures and high magnetic fields. The spin splitting is observed in Shubnikov–de Haas oscillations at a magnetic field higher than 5.4 T and a temperature of 1.4 K. The effective g factor g* is enhanced due to the exchange interaction of the 2DEG at high densities. The ratio of the transverse effective g factor g⊥* and the longitudinal effective g factor g∥* is g⊥*/g∥*=2.6 indicating the large difference between g∥* and g⊥*. It is demonstrated that the anisotropy of the g* is due to the strong polarization-induced electric field at the heterointerface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c11079228cc7074481307cd7e1b75b9d https://doi.org/10.1063/1.1642732 Zobrazit plný text záznamu