Contrast between spin and valley degrees of freedom

Autor:	Gokmen, T., Padmanabhan, Medini, Shayegan, M.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 81, 235305 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.81.235305
Popis:	We measure the renormalized effective mass (m*) of interacting two-dimensional electrons confined to an AlAs quantum well while we control their distribution between two spin and two valley subbands. We observe a marked contrast between the spin and valley degrees of freedom: When electrons occupy two spin subbands, m* strongly depends on the valley occupation, but not vice versa. Combining our m* data with the measured spin and valley susceptibilities, we find that the renormalized effective Lande g-factor strongly depends on valley occupation, but the renormalized conduction-band deformation potential is nearly independent of the spin occupation. Comment: 4+ pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1008.2536 Zobrazit plný text záznamu View this record from Arxiv