Drexel University - Comprehensive, integrated academics enhanced by co-operative education, technology, and research opportunities. | Drexel University
Drexel University
Search events. View events.

All Categories

Click for help in using calendar displays. Print the contents of the current screen.
Display Format: 
Event Details
Notify me if this event changes.Add this event to my personal calendar.
Go Back
Physics Colloquium: The Nonlinear Electrodynamics of Weyl Semimetals
Start Date: 6/6/2019Start Time: 3:30 PM
End Date: 6/6/2019End Time: 4:30 PM

Event Description

Darius H Torchinsky, PhD, Temple University

At the heart of the Weyl semimetal are massless, chiral quasiparticles that derive from electronic band-crossings split by either spatial inversion or time-reversal symmetry breaking. The resulting nodal points in the bulk band structure serve as sources and sinks of units of Berry curvature or “topological charge” that are responsible for the phenomenology usually associated with these materials, including open Fermi arc surface states, negative magnetoresistance, and the chiral anomaly. However, Weyl semimetals with acentric crystal structures can also support second order nonlinear optical responses that reveal their unique band structure in surprising ways. In this talk, I will discuss our recent observation of a quantized photogalvanic effect in the structurally chiral Weyl semimetal RhSi measured using nonlinear optical techniques that reports its topological charge directly and also share our ongoing spectroscopic studies of the second harmonic generation response of this material.

Contact Information:
Name: Professor Goran Karapetrov
Email: gk327@drexel.edu
Disque Hall, Room 919, 32 South 32nd Street, Philadelphia, PA 19104
  • Undergraduate Students
  • Graduate Students
  • Faculty

  • Display Month:

    Advanced Search (New Search)
    Date Range:
    Time Range:

    Special Features: 

    Select item(s) to Search

    Select item(s) to Search
    Select item(s) to Search
    Select item(s) to Search