ICPS 2014

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8:30-9:00
Invited: Hanan Dery
Spin Transport in 2D Membranes

Group theory is a powerful tool to investigate spin-dependent transport and optical properties. It allows one to identify important processes and to define the physics with a minimal set of material dependent parameters. In this talk, I will present our recent findings for the spin transport in 2D membranes including monolayer transition-metal dichalogonides, graphene [1,2], and silicene. I will focus on spin flips induced by flexural phonons and show that the spin relaxation is ultrafast for electrons in free-standing membranes while being mitigated in supported membranes. This behavior is universal in 2D membranes that respect mirror symmetry and it leads to a counterintuitive inverse relation between mobility and spin relaxation. The findings will be compared with the case of graphene.

[1] Y. Song and H. Dery, "Transport Theory of Monolayer Transition-Metal Dichalcogenides," Phys. Rev. Lett. 111, 026601 (2013).
[2] T. Cheiwchanchamnangij, W. R. L. Lambrecht, Yang Song, and Hanan Dery, "Strain effects on the spin-orbit induced band structure splittings in monolayer MoS2 and graphene,"Phys. Rev. B 88, 155404 (2013).

9:00-9:15
Oral: Sangyeop Lee
Doping-Controlled Interlayer Exchange Coupling in Ferromagnetic Semiconductor GaMnAs/GaAs Multilayers
Co-authors: Sunjae Chung, Taehee Yoo, Hakjoon Lee, Sanghoon Lee, Xinyu Liu, Jacek Furdyna

9:15-9:30
Oral: Jianhua Zhao
Ferromagnetic Interfacial Interaction & Magnetic Proximity Effect in Co2FeAl/(Ga,Mn)As Bilayers

9:30-9:45
Oral: Takafumi Akiho
Efficient Dynamic Nuclear Polarization Using Electrical Spin Injection from a Half-Metallic Spin Source
Co-authors: Yuya Ebina, Hong-xi Liu, Masafumi Yamamoto, Tetsuya Uemura

9:45-10:00
Oral: Christopher Morrison
Zero-Field Spin Splitting in a High Mobility Ge 2D Hole Gas
Co-authors: Maksym Myronov, Piotr Wi´sniewski, Stephen Rhead, David Leadley

10:00-10:15
Oral: Vanessa Sih
Electrical Orientation of Electron & Nuclear Spins in Semiconductors
Co-authors: B. M. Norman, C. J. Trowbridge, D. D. Awschalom

10:15-10:30
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