University of Connecticut

Events Calendar

Physics Colloquium

Friday, October 17, 2014
4:00pm – 5:00pm

Storrs Campus
Gant Science Complex, Room P-38

Dr. Alexander V. Balatsky, Nordita, Stockholm, Sweden and Los Alamos National Laboratory, NM

“Quantum imaging of Dirac Materials”

Recently a new single-layer material—graphene—has been discovered. This is a material where quasi-particle behavior is described by the very same Dirac equation that governs behavior of relativistic particles. Dirac fermionic spectrum leads to very unusual properties of these materials, including Klein paradox, chirality of carriers, unusual electron transport and impurity states. These properties are not unique to graphene, instead they represent universal consequences of the Dirac spectrum of the fermionic excitation sector. I will explore these similarities with other materials exhibiting similar spectra including d-wave superconductors, superfluid 3He and recently discovered topological insulators and discuss the unique role of symmetries that protect the Dirac spectrum. I will also discuss how we can use modern tools to design Dirac Materials and perform their quantum imaging. I will illustrate how the ripples in the Dirac sea produced by defects can induce fascinating features that can be probed locally.

Refreshments will be prior to the talk, at 3:30 p.m., in the Gant Complex, Physics Library, Room P-103.

Contact:

Dawn Rawlinson, 486-4916, dawn.rawlinson@uconn.edu

Physics Department (primary)

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