Events
Events:
Public Talk: Shining Light on Electrons at the Nanoscale Aug 10, 2015
As a part of the on-going conference on "Topological Particles in Condensed Matter Physics", IISER Pune has organized a public talk:
Shining Light on Electrons at the Nanoscale
by
Prof. Aron Pinczuk, Columbia University
Date: August 10, 2015
Time: 6.00 pm
Venue: C. V. Raman Auditorium, LHC, Pune
Abstract:
Low-dimensional electron systems in man-made structures in which characteristic lengths are reduced to the nanoscale display remarkable behaviors due to fundamental quantum physics. In two- dimensional systems benchmark examples are composite fermionic quasi-particles that currently interpret experimental results in the quantum Hall regimes. In artificial lattices with honeycomb topology, created by state-of-the-art nanofabrication, electrons behave as massless Dirac fermions with linear energy- momentum dispersion (artificial graphene). These low-dimensional systems display unique quasi-particle excitations that at low temperatures express fundamental quantum interactions. These excitations are probed by Raman light scattering experiments that access directly the emergent quasi-particle excitation modes. This presentation has two segments. The first segment describes properties of low dimensional electron systems in semiconductor nanostructures and a very brief tutorial on light scattering processes in the low-dimensional electron gas. The second segment presents an overview of recent light scattering experiments in two- dimensional systems that reveal key physics that arises from combined impact of reduction in dimensionality and fundamental interactions.
About the Speaker:
Prof. Pinczuk is one of foremost condensed matter experimentalists, known for his pathbreaking work using Raman’s inelastic light scattering to learn about properties of matter in extreme conditions. He has contributed to the fields of spectroscopy of semiconductors and insulators, quantum structures and interfaces, electrons in systems of reduced dimensions, and electron quantum fluids. For his seminal contributions, he was awarded in 1994 the Oliver E. Buckley Prize of the American Physical Society, the highest prize in the United States in the field of condensed matter physics. He is an elected Fellow of the American Academy of Arts and Sciences and of the American Association for the Advancement of Science. Prof. Pinczuk currently holds the position of Professor of Physics and Applied Physics at Columbia University. He was a Distinguished Member of the technical staff of the Bell Laboratories / Lucent Technologies during 1978-2006.
