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Events on Thursday, May 27th, 2010

R. G. Herb Condensed Matter Seminar
Transport experiments on carbon nanotube double quantum dots
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Simon Chorley, Cambridge University
Abstract: In this talk I will present the results of a number of electrical transport experiments performed at low temperature on carbon nanotube double dots.

I will discuss in detail the behaviour of a double dot which exhibits Pauli spin blockade, and its interaction with the environment. In our experiments we measure and demonstrate control of the single-triplet exchange coupling between the dots and investigate the effect of spin-orbit interaction. We find that the double dot is exchange-coupled to a single impurity spin and show how this affects transport.

On the same device, under different coupling conditions, the Kondo effect is present and we probe the competition between Kondo and exchange interactions. I will then move on to initial experiments of state sensing performed using radio-frequency reflectometry with a resonator directly coupled to the nanotube. Finally I will show results of quantised charge pumping using a nanotube double dot.
Host: Mark Eriksson
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