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InAs-AlSb quantum wells in tilted magnetic fields

2000; American Physical Society; Volume: 61; Issue: 19 Linguagem: Inglês

10.1103/physrevb.61.13045

1095-3795

S. Brosig, K. Ensslin, A. G. M. Jansen, C. Nguyen, B. Brar, M. Thomas, H. Kroemer,

Advancements in Semiconductor Devices and Circuit Design

InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method, we find, for magnetic fields up to 28 T, that the spin splitting can be as large as five times the Landau splitting. We find a value of the g factor of $|g|\ensuremath{\approx}13.$ For small even-integer filling factors the corresponding minima in the Shubnikov--de Haas oscillations cannot be tuned into maxima for arbitrary tilt angles. This indicates the anticrossing of neighboring Landau and spin levels. Furthermore, for particular tilt angles we find a crossover from even-integer-dominated Shubnikov--de Haas minima to odd-integer minima as a function of magnetic field.