Quantum spin liquids: Can an insulator have a Fermi surface?

Speaker:Dr. Daniel Podolsky
Location:Lidow Rosen Auditorium (323)
Abstract:A quantum spin liquid is a state of matter with strong spin correlations over short distances, but in which quantum fluctuations and geometrical frustration impede the formation of long-range order, leading instead to a fluid-like state over long distances.  Although the experimental detection of such a state has remained elusive, the potential payoff for its observation is great, with rich physical consequences such as fractional particles and emergent gauge fields.  Recently, a host of promising new materials has been discovered which may provide the first experimental examples of spin liquids.  I will discuss recent experimental and theoretical developments in this field.