[Jlab-seminars] Fwd: Physics Colloquium Friday, May 3 "Coulomb drag and spin Coulomb drag: from electrons to atoms " - Dr. Giovanni Vignale

[Mary Fox]

-------- Original Message --------
Subject: 	Physics Colloquium Friday, May 3 "Coulomb drag and spin 
Coulomb drag: from electrons to atoms " - Dr. Giovanni Vignale
Date: 	Mon, 29 Apr 2013 15:56:18 +0000
From: 	Wilkinson, Eleonor V <evwilk at wm.edu>
To: 	undisclosed-recipients:;



*PHYSICS COLLOQUIUM *

Friday, May 3, 2013

4:00 PM

Small Hall, Room 111

*Dr. Giovanni Vignale *[Host: Enrico Rossi]**

University of Missouri

*Title of Talk:*

/"Coulomb drag and spin Coulomb drag: from electrons to atom"/

**

*Abstract:*

The expression Coulomb drag is used to describe the mutual friction due 
to the Coulomb electrostatic interaction between electric currents that 
flow in adjacent layers of semiconductor material. This phenomenon 
provides a new coupling mechanism (alternative to the conventional 
inductance and capacitance) between spatially separated elements of 
nano-electronic circuitry. From a more fundamental point of view, it can 
be a revealing probe of novel states of electronic matter. More 
recently, the phenomenon of spin Coulomb drag, whereby friction occurs 
between currents of opposite spin orientation in a single electronic 
layer, has attracted attention in the context of a new branch of 
electronics, which is known as "spintronics". This phenomenon has been 
observed and quantitatively verified in experiments. Lately a new drag 
mechanism, based on energy rather than momentum exchange has been 
suggested for systems consisting of two parallel carbon monolayers 
(graphene). In this talk I review some of the latest theoretical and 
experimental developments on Coulomb drag and spin Coulomb drag in novel 
quantum systems such as graphene, topological insulators and cold atoms.

For more information please visit 
https://events.wm.edu/event/view/physics/22662.

*/*Refreshments will be served in Room 122 at 3:30 PM/*

*//*

Thanks,

Elle

******

*Eleonor V. Wilkinson*

Administrative & Office Specialist

The College of William & Mary-Physics
Small Hall, Room 123
300 Ukrop Way
Williamsburg, VA 23185

Telephone: 757-221-3503

Fax: 757-221-3540

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