ELFT HÍRADÓ

[Kádár György <kadargy AT mfa.kfki.hu>]

MFA Szeminárium
(nem szerda, hanem hétfő!!!)

Z. Q. Qiu (U. California,Berkeley)
Quantum Well States in Magnetic Nanostructures

2011. május 16.-án, hétfőn 11:00 órakor
az MTA Műszaki Fizikai és Anyagtudományi
Kutatóintézet Tanácstermében,
KFKI 26. épület I. emelet

Minden érdeklődőt szívesen várunk

Kádár György (MFA)
kadargy AT mfa.kfki.hu

Short abstract: Electrons in ultrathin films are confined to form 
quantum well states (QWS). Photoemission provides the most direct 
observation of QWS in k-space. The unique capabilities now available at 
the Advanced Light Source (ALS) at Berkeley make it possible to measure 
the QW states with atomic layer resolution.  In this talk, the 
photoemission result from the ALS on the Cu/Co(100) QW system is 
presented. Firstly, using a Ni monolayer to probe the Cu QWS at 
different positions, it is shown that the QWS in metallic thin films can 
be described by the envelope function of the Bloch wave. Secondly, by 
measuring the magnetic coupling using the magnetic dichroism, the 
relationship is demonstrated between the oscillatory magnetic coupling 
and the oscillations of the density of states at the Fermi level.