Spin-orbit interaction induced singularity of the charge density relaxation propagator

Autor:	Badalyan, S. M., Matos-Abiague, A., Fabian, J., Vignale, G., Peeters, F. M.
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 88, 195402 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.88.195402
Popis:	The charge density relaxation propagator of a two dimensional electron system, which is the slope of the imaginary part of the polarization function, exhibits singularities for bosonic momenta having the order of the spin-orbit momentum and depending on the momentum orientation. We have provided an intuitive understanding for this non-analytic behavior in terms of the inter chirality subband electronic transitions, induced by the combined action of Bychkov-Rashba (BR) and Dresselhaus (D) spin-orbit coupling. It is shown that the regular behavior of the relaxation propagator is recovered in the presence of only one BR or D spin-orbit field or for spin-orbit interaction with equal BR and D coupling strengths. This creates a new possibility to influence carrier relaxation properties by means of an applied electric field. Comment: 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1308.3264 Zobrazit plný text záznamu View this record from Arxiv