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Wednesday, April 02, 2014
3:00 PM - 4:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

CMS Colloquium

**Location Change** Bulk Thermoelectric and Thermodynamic Probes of non-Abelian Anyons in Topological Systems

Kun Yang
Florida State University, National High Magnetic Field Lab

Topological states of matter support quasiparticle excitations with fractional charge and possibly exotic statistics of the non-Abelian type, known as non-Abelian anyons. Most current experimental attempts to reveal such exotic statistics focus on interference involving edge transport. After a brief introduction of topological states, in this talk we will discuss how one can reveal the non-Abelian quasiparticle statistics in bulk probes. We show that bulk thermopower is a promising way to detect their non-Abelian nature, and measure the quantum dimension (a key parameter that quantifies non-Abelian statistics) of these anyons. We also demonstrate a novel cooling effect associated with them. We discuss application of these ideas to the specific candidate system of FQH liquid at filling factor 5/2, and topological insulator-superconductor hybrid systems. Some of the predicted behavior has been observed in recent experiments, which will also be discussed.

Host: Armin Rahmani