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Tuesday, August 12 • 08:30 - 10:30
Spintronics & Spin Phenomena II

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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
Open

Session Chairs
VS

Vanessa Sih

University of Michigan

Speakers
HD

Hanan Dery

Associate Professor of Electrical & Computer Engineering, University of Rochester
Hanan Dery, a specialist in the emerging field of spintronics, joined the Department of ECE in July, 2007. Previously, he was a Postdoctoral Associate in Lu Sham's group in the Department of Physics, University of California San Diego (UCSD). During this time, he worked on spintronics, seeking ways to integrate information based on electron spin into semiconductors. Dery earned his PhD in Electrical Engineering from Technion-Israel Institute of... Read More →


Tuesday August 12, 2014 08:30 - 10:30
Room 18CD

Attendees (13)