Kondo physics in multilevel quantum dots.

Add to your list(s) Download to your calendar using vCal

• Prof. David Logan, Theoretical Chemistry, Oxford University
• Thursday 21 May 2009, 14:15-15:15
• TCM Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Dr Jonathan Keeling.

The low-energy behaviour of quantum dots coupled to metallic leads is commonly associated with a single ‘active’ dot level, and hence with the spin-1/2 Kondo efect. But this is not ubiquitous: if several dot levels are relevant to charge transport, higher spin Kondo efects may arise, and have been observed experimentally. This talk will discuss a rather general model for a two-level correlated quantum dot, studied largely via RG. Particular consideration will be given to the spin-1 and spin-1/2 Kondo regimes which occur on sweeping the dot levels through the Fermi level by tuning a gate voltage; to the nature of the resultant quantum phase transition between the regimes arising in a two-lead, one-channel setup; and to comparison to experiment. Time permitting, I may also discuss some aspects of SU(4) Kondo physics in carbon nanotube quantum dots.

This talk is part of the Theory of Condensed Matter series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Combined TCM Seminars and TCM blackboard seminar listing
• Featured lists
• Lennard-Jones Centre external
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• PMRFPS's
• School of Physical Sciences
• TCM Seminar Room, Cavendish Laboratory
• Theory of Condensed Matter
• Thin Film Magnetic Talks

Note that ex-directory lists are not shown.