BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Spin blockade and Kondo physics in carbon nanotube double quantum 
 dots- Dr. Mark Buitelaar -Semiconductor Physics group - Speaker to be conf
 irmed
DTSTART:20120607T133000Z
DTEND:20120607T150000Z
UID:TALK38497@talks.cam.ac.uk
CONTACT:Kimberly Cole
DESCRIPTION:In this talk\, I will discuss recent measurements in which we 
 investigate spin blockade and Kondo physics in carbon nanotube double quan
 tum dots. \nSpin blockade is observed in weakly coupled double quantum dot
 s when electron transitions between the dots are forbidden by spin conserv
 ation. \nAs such\, this phenomenon is of considerable importance in spin-b
 ased quantum information processing schemes as a way to convert the spin d
 egree of freedom to a much easier detectable charge state or current. Here
  I discuss results on spin blockade in carbon nanotube double quantum dots
  and coupling to impurity spins in the nanotube environment.\n\nThe abilit
 y to control the tunnel couplings in the nanotube devices also allows us t
 o investigate carbon nanotube double quantum dots which are much more stro
 ngly coupled to their leads. In this case\, we observe pronounced Kondo fe
 atures. Of particular interest here is the competition between Kondo corre
 lations and exchange coupling between the spins\, when both quantum dots c
 ontain an odd number of electrons. These effects have been studied as a fu
 nction of tunnel coupling\, temperature and magnetic field and will be dis
 cussed during the second part of the talk\, as well as recent radio-freque
 ncy reflectometry measurements on the nanotube double quantum dots.\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory
END:VEVENT
END:VCALENDAR