Spin effects in the local density of states of
Institut für Festkörperphysik, Universität
Hannover Appelstr. 2, 30167 Hannover, Germany
Accepted: 8 March 2001
We present spin-resolved measurements of the local density of states in -doped . Both spin components exhibit strong mesoscopic fluctuations. In the regime of the lowest Landau band, the main features of the spin-up and spin-down components of the local density of states are found to be identical apart from Zeeman splitting. Based on this observation, we introduce a new method to measure the g-factor in a material where macroscopic methods are severely restricted by disorder. Differences between the spin-up and spin-down components are discussed in terms of spin relaxation due to spin-orbit coupling.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 72.20.My – Galvanomagnetic and other magnetotransport effects / 85.30.Mn – Junction breakdown and tunneling devices (including resonance tunneling devices)
© EDP Sciences, 2001