Theoretical Physics Seminar
Title : Introduction to High-Energy Neutrino Astrophysics
Date : 02-12-2024
Time : 11:00:00
Speaker : Dr. Bhupal Dev, Washington University, USA
Area : Theoretical Physics
Venue : Room no: 469 (Main Campus)
Abstract
We will provide a pedagogical introduction to High-Energy Neutrino Astrophysics and the emerging field of Multimessenger Neutrino Astronomy. We will discuss how the high-energy neutrinos are produced, propagate and are detected and what they can tell us about the origins of cosmic rays, dark matter, and other fundamental puzzles of the Universe.
Title : Unveiling the mechanism behind sign changes in the thermopower and Hall coefficient of strained Sr2RuO4
Date : 04-12-2024
Time : 04:00:00
Speaker : Dr. Sudeep K. Ghosh, IIT Kanpur
Area : Theoretical Physics
Venue : Room no: 469 (Main Campus)
Abstract
Sr2RuO4 is a fascinating material in condensed matter physics, celebrated for its unconventional superconductivity and intricate electronic structure. A particularly intriguing aspect is its strain-induced Lifshitz transition, which profoundly influences transport properties. Notable among these effects are the sign changes observed in the thermopower and Hall coefficient under strain, a phenomenon that remains not fully understood. In this talk, I will explore these transport properties using the semiclassical Boltzmann transport formalism, examining both unstrained and strained (uniaxial and c-axis) systems. I will demonstrate that the sign changes are driven by the Van Hove singularity, which emerges as a direct consequence of the Lifshitz transition, offering deeper insights into the electronic structure and transport behavior of Sr2RuO4.