Bulk-boundary correspondence of topological insulators

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

• Prof. Victor Gurarie, University of Colorado at Boulder
• Thursday 12 May 2011, 14:15-15:15
• TCM Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Dr G Moller.

Topological insulators are noninteracting gapful fermionic systems which have gapless boundary excitations. They are characterized by topological invariants. The topological invariants can be written in many different ways, including in terms of the Green’s functions. We show that the existence of the boundary states directly follows, and can be derived by simple manipulations, from the existence of the bulk topological invariant written in terms of the Green’s functions, for all types of topological insulators in all spacial dimensions. At the same time, the same procedure explains why topological insulators, once the interactions are turned on, can lose their boundary states.

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
• few29

Note that ex-directory lists are not shown.