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Unraveling Electronic and Spin Structure with Photoemission – Oleg Krupin

Date: Mon. February 26th, 2007, 12:30 pm-1:30 pm
Location: Rockefeller 221

Angle-resolved photoemission is widely recognized as a versatile tool for studies of the electronic structure and Fermi surface topology of new structures and materials with electronic and magnetic properties potentially interesting for modern electronics and future spintronics applications. In my talk I will present two examples showing that it also can be used to study effects directly associated with the spin structure. At the example of the rare-earth metal surfaces I will consider an appearance of the Rashba effect at real surfaces/interfaces and associated electron and spin structures. In the past this effect has attracted considerable attention due to proposing it for manipulating the electron spin by an electric field. I will also present results of investigating the spin-density wave ground state of Cr1-xVx alloy films. The spin-density wave plays an important role in mediating magnetic interactions in magnetic multilayer structures providing a giant magnetoresistance effect and potentially interesting for application in spintronic devices. A key feature of the results is the ability to control the spin-density wave periodicity in the Cr1-xVx films with an external perturbation.

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