Tue, 02/13/2018

At a recent workshop at the Banff International Research Station, I gave a talk about the possibility of huge thermopower in nodal semimetals.  You can watch the seminar at the link below, or read the preprint at

Thu, 01/04/2018

I have been invited to discuss my recent work on semimetals at a number of universities.  The title of the talk is "Semimetals Unlimited", and I discuss ways in which nodal semimetals can overcome the limits on electron mobility and thermopower that constrain semiconductors.

Caltech: Nov...

Wed, 10/11/2017

Together with Sergey Syzranov, I studied the conductivity of nodal line semimetals. These turn out to be qualitatively different from other semimetals, like Weyl or Dirac semimetals, because of an unusual screening that changes the nature of the Coulomb potential from 1/r to 1/r^2.  Most...

Thu, 09/29/2016

A new paper in Nature Communications describes experiments that examine the "extreme quantum limit" of magnetic field in the material strontium titanate.  We find evidence of a drastic reduction of the Fermi energy driven by the magnetic field, which leads to the formation of a spatially...

Mon, 08/29/2016

In a recent paper, Tianran Chen and I identified an interesting fractal structure of hopping conduction pathways in compensated semiconductors.  The finding implies that hopping conductivity is unusually large and robust in these systems, and can appear two-dimensional even in a 3D system.

Mon, 06/27/2016

In a series of recent papers, I explored ways to make bosonic particles with unusual properties using bilayer electronic systems.  These works suggest new ways to realize quantum phases and quantum phase transitions of 2D bosons.


Thu, 04/14/2016

I am giving a seminar at the Applied Math Lab at NYU's Courant Institute in New York City. 

Fri, 02/26/2016

I am giving a talk on Friday, Feb. 26, at Harvard Unversity as part of the Boston Area CarBon Nanoscience Meetings (BACON+). 
The topic will be the possibility of creating continuously tunable bosonic phases (such as Bose-Einstein condensates, superfluids, and Wigner crystals) using...

Tue, 02/23/2016

I am giving a seminar on Tuesday, Feb. 23 at the Widely Applied Math seminar at Harvard University.  My talk is entitled "Problems in Human Motion Planning", and it will deal with the statistical mechanics of pedestrian crowds and traffic networks.

Fri, 01/08/2016

I recently co-authored a book chapter that reviews what we know about the theory (and practice) of optimal offensive strategy in basketball.  You can also read a popular summary of its contents here: http...