ELFT HÍRADÓ

[dora AT kapica.phy.bme.hu]

                             MEGHÍVÓ

      a BME Egzotikus kvantum fázisok csoport szemináriumára:


                          Igor Herbut
                Simon Fraser University, Kanada


"Interactions and phase transition in Dirac systems in two and three 
dimensions"


Kivonat:
I will review recent advances in our understanding of the effects of 
electron-electron interactions in systems that exhibit band crossing or
touching at the Fermi level. Two study cases will be covered in detail: 1) 
interacting electrons on the honeycomb or pi-flux lattice,  2) and the
electronic systems with the quadratic band touching in two and three
dimensions, such as bilayer graphene and mercury telluride, for example. I 
will discuss the universal physics of the semimetal - Mott insulator 
transition in the Hubbard model for the former case, as uncovered by 
field-theoretic and Monte Carlo methods. Three dimensional systems with 
the quadratic band touching will be argued to be a precious examples of 
the possible non-Fermi liquid physics, ultimately giving way to new 
symmetry broken states at low temperatures.  




Helye:  BME Fizikai Intézet, Fizika Tanszék
        Budafoki út 8. F-épület, 2. emelet, 13-as terem


Ideje: 2016. április 28 (csütörtök), 10:15.


    Minden érdeklődőt szívesen látunk!




                                Dóra Balázs