As of first of July, Emil has taken up a tenured faculty position at Stockholm University, generously supported be the Wallenberg Academy Fellows program.
News from Jul 04, 2016
News from Sep 02, 2015
News from Jul 26, 2015
News from Jun 19, 2015
We recently published the pre-print "Quantum transport in Dirac materials: signatures of tilted and anisotropic Dirac and Weyl cones" on arxiv.org.
News from Feb 12, 2015
We recently published the article "Topology and Interactions in a Frustrated Slab: Tuning from Weyl Semimetals to C>1 Fractional Chern Insulators" in Physical Review Letters (114).
News from Feb 12, 2015
A comprehensive introduction to one of our main fields of interest, "Topological Flat Band Models and Fractional Chern Insulators" -- see the link on the left.
News from Aug 08, 2013
"Topological Phases in Condensed Matter and Cold Atom Systems: towards quantum computations"
News from Jun 05, 2013
Talk given at Oxford University. Title: "Fractional Chern insulators: High-temperature quantum Hall states and beyond" Abstract: A large number of recent works point to the emergence of intriguing analogues of fractional quantum Hall (FQH) states in two-dimensional lattice models due to effective interactions in nearly flat bands with Chern number C=1. In principle, this opens up a number of intriguing possibilities including lattice realizations of quantum Hall phenomena at room temperature and zero magnetic field. In this talk, I will summarize some of our recent work in the area.First, I will discuss how the most prominent fractional Chern insulators (FCIs) in C=1 bands quantitatively compare to Abelian and non-Abelian FQH states by using a Wannier basis representation of the Chern band.Second, I will give a heuristic explanation of the numerically observed FCIs and their relative stability by relating the lattice interactions to Haldane’s pseudopotentials in the continuum, as well as discuss a new interaction driven instability to incompressible states that is absent in continuum systems and is responsible for the absence of some FCIs. Third, I will discuss how flat bands with higher Chern number, C>1, naturally form in quasi-two-dimensional slabs of pyrochlore oxides and demonstrate the existence of qualitatively new correlated states within these bands.
News from May 22, 2013