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CATEGORIES:Semiconductor Physics
SUMMARY:Conductance anomaly and Zeeman splitting in ballis
 tic hole quantum wires - Dr. Romain Danneau (Schoo
 l of Physics\, University of New South Wales\, Syd
 ney\, Australia)
DTSTART;TZID=Europe/London:20060612T141500
DTEND;TZID=Europe/London:20060612T151500
UID:TALK5114AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/5114
DESCRIPTION:I will present a study of the Zeeman splitting in 
 ballistic hole\nquantum wires formed in a (311)A q
 uantum well by surface gate\nconfinement. Transpor
 t measurements clearly show lifting of the spin\nd
 egeneracy and crossings of the subbands when an in
 -plane magnetic\nfield B is applied parallel to th
 e wire. When B is oriented\nperpendicular to the w
 ire\, no spin-splitting is discernible up to B =\n
 8.8 T. This anisotropic behavior is also measured 
 for the 0.7\nstructure and the zero bias anomaly. 
 The observed large Zeeman\nsplitting anisotropy in
  our hole quantum wires demonstrates the\nimportan
 ce of quantum-confinement for spin-splitting in\nn
 anostructures with strong spin-orbit coupling.\n\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Departm
 ent of Physics
CONTACT:K DAS GUPTA
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