Nonequilibrium multi-band spin quantum transport: Spin, pseudo-spin, and total charge coupling

Authors

Ricardo A. Narandan ⋅ US Theoretical and Computational Sciences and Engineering (TCSE) Group
Felix Buot ⋅ PH Department of Physics,University Of San Carlos
Roland Emerito Otadoy ⋅ PH Department Of Physics, University of San Carlos

Abstract

Using the superfield nonequilibrium Green’s function technique, the spatio-temporal spin magnetization quantum transport equations (SMQTEs) were derived for a two-band model of semiconductors. The results show that the multi-band real SMQTEs are coupled to the pseudo-spin magnetization transport equations. Thus the SMQTEs essentially consist of three group of terms describing the rate of change, namely, (1) a group of terms similar to the equation for particle quantum transport, (2) a group of terms describing various torques influencing the spin orientation and phase-space magnetization density, and (3) a group of terms expressing the coupling of the real spin magnetization with the pseudo-spin magnetization. Self-consistently, the pseudo-spin magnetization equations incorporate the pseudo-spin/real spin coupling, as well as the pseudo-spin coupling to the total charge.

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Issue

2013: Proceedings of the 31st Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP2013-1B-1

Section

Theoretical Physics

Published

2013-10-23

How to Cite

[1]

RA Narandan, F Buot, and RE Otadoy, Nonequilibrium multi-band spin quantum transport: Spin, pseudo-spin, and total charge coupling, Proceedings of the Samahang Pisika ng Pilipinas 31, SPP2013-1B-1 (2013). URL: https://proceedings.spp-online.org/article/view/SPP2013-1B-1.