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SUMMARY:Observations of the 0.7 anomaly in p-type quantum point contacts (
 SP Workshop) - Miss Karina Hudson\, University of New South Wales
DTSTART:20150902T131500Z
DTEND:20150902T141500Z
UID:TALK59560@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:The 0.7-anomaly in 1D conductance has been the focus of many r
 esearch efforts since its discovery\, however theoretical models have larg
 ely failed to account for all experimental observations of the feature in 
 1D electron conductance. Furthermore\, few studies have addressed the prop
 erties of the 0.7 anomaly in hole-based 1D devices. In this work\, we pres
 ent measurements of the 0.7 anomaly in a GaAs quantum point contact. We de
 monstrate that our measurements qualitatively bear striking similarities w
 ith the recently proposed model of the 0.7 resulting from an enhanced loca
 l density of states via a smeared van Hove singularity about the peak of t
 he quantum point contact potential barrier.
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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