Condensed Matter/Biological Physics Seminar: Dr. Brian Skinner, ANL  Add To Calendar

  • Date(s): Thursday, 4/2 10:00 AM to Thursday, 4/2 11:00 AM
  • Speaker: Dr. Brian Skinner
  • Host: Fatemeh Khalili-Araghi
  • Campus Address: 2214 SES (Science and Engineering South)
Title: Negative compressibility

Abstract: Negative compressibility, in which a system lowers its energy with increasing density, is an unusual feature of strongly-correlated systems with long-ranged Coulomb interactions. In this talk I first show how negative compressibility arises in two-dimensional electron gases, including conventional semiconductor heterostructures and graphene, and discuss its experimental signature. I then show how similar physics is behind the remarkable performance of supercapacitors, which are energy storage devices capable of storing hundreds of Coulombs of electric charge within a single cubic centimeter of volume. Finally, I discuss how an understanding of correlation-enhanced compressibility enabled us to resolve a long-standing puzzle associated with the behavior of human crowds.

Cm-Bio 4-02 Skinner