University of Connecticut

Events Calendar

Graduate Student Seminar

Friday, March 29, 2019
12:15pm – 1:15pm

Storrs Campus
P121

Prof. Boris Sinkovic, Department of Physics, University of Connecticut

Topological Insulators, New Paradigm for Quantum Electronics

Recent discovery of topological insulators (TI) and realization that they present new states of matter has generated much excitement in the condensed matter physics community and beyond. TI are insulators in the bulk but their boundaries support gapless spin-chiral state with extraordinary properties and relativistic momentum dispersion. Because of the time reversal symmetry, the electrons at the boundaries cannot back-scattered by non-magnetic impurities and their spin-coherence is preserved over very long distances, which is of great technological interest in spintronics and quantum computing. In particular, magnetic TI are predicted to exhibit opening of the energy gap at the Dirac point and give rise to massive Dirac fermions, leading to the experimental realizations of quantum anomalous Hall effect (QAHE). On the other hand the superconducting TI are proposed to induce new collective particle, Majorana fermions that have a potential to be a platform for quantum computing. In this talk I will present our group’s attempts to induce the magnetism and superconductivity in TI, and the challenges to overcome. The studies combine growth of atomically thin films of TI and momentum resolving spectroscopy of Dirac states by angle-resolved photoemission (ARPES) technique, performed at our UCONN lab and at the Brookhaven National Lab.

Contact:

Prof. V. Kharchenko

Physics Department (primary), UConn Master Calendar

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