Saturations fields in the Shubnikov-de Haas oscillations

• Published in: Physica status solidi. C Vol. 2; no. 8; pp. 3153 - 3156
• Main Authors: Cardoso, J. L., Pereyra, P.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.05.2005; WILEY‐VCH Verlag
• Subjects: 72.25.-b; 73.40.Gk; 75.47.-m
• ISSN: 1610-1634; 1610-1642
• DOI: 10.1002/pssc.200460741

We study the Shubnikov‐de Haas oscillations in the magnetoresistance and Landauer conductance of a three strip quasi‐2D semiconductor wave guide with thickness δz and transversal width wy. We assume that the strip in the middle, of length lH, is subject to a homogeneous magnetic field, tilted by θH with respect to the normal ž of the 2DEG. The structure of the Shubnikov‐de Haas oscillations, associated with spin parallel and antiparallel to the z‐component of the magnetic field, and the finiteness of lH, lead us to define, related with the limits between the corresponding Landau levels and the continuous spectrum, two characteristic saturation fields defined by the positive root of . Here g is the Landé factor, Φo the unit magnetic flux and ns the charge concentration. We also obtain the polarization field . (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)