Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 43: Spintronics (joint session HL/TT)

HL 43.5: Talk

Thursday, March 15, 2018, 16:00–16:15, EW 201

Spin valley coherent transport in Graphene — •Saber Rostamzadeh — Sabanci University, Orta Mahalle, Universite Caddesi No:27, 34956 Orhanli/Tuzla/Istanbul

Due to the advent of Spintronics, which attempts to perform calculations and store information using the spin instead of charge, there is a gradual increase in investigating methods to manipulate the spin degree of freedom of electrons in quantum confined structures to propose a surrogate for conventional electronic devices.

It has been shown that spin orbit coupling in Graphene plays a major role in generating and manipulating of spin polarized currents which found useful in spintronics applications.

Extra degree of freedom such as valley index in Graphene always adds to the functionality of the system and in a sense enlarges the parameter space of the system and works as an additional control parameter without the effort to make one.

In this work we demonstrate the effect of Rashba spin orbit interaction in Graphene induced by adatoms and show that it produces spin-valley coupling. This feature is useful in manipulating spin degree of freedom via valley index and furthermore we illustrate and theoretically set up a formalism which suggest the extraction of spin current form a valley current.