ELFT HÍRADÓ

[DORA Balazs <dora AT zero.eik.bme.hu>]

                 MEGHÍVÓ


 az Egzotikus Kvantum Fázisok csoport szemináriumára:


              Igor F. Herbut
          (Simon Fraser University)



"Non-fermi liquids, fixed point collisions, and tensorial order in grey 
tin and in some popular field theories"


Kivonat: Abrikosov proposed in 1974 that a 3D electronic system with its 
fermi level at the point of quadratic band crossing, as in the (spin-orbit
coupled) gray tin or mercury telluride, should represent the simplest 
non-fermi liquid, due to the common long-range Coulomb interaction between 
particles. I will review this idea and discuss how a non-fermi liquid 
ground state may be unstable to ordering via the mechanism of "fixed-point 
collision". This mechanism, with its concomitant hierarchy of scales, may 
also be identified as the culprit behind the notorious dynamical chiral 
symmetry breaking in the three dimensional electrodynamics, known as the 
effective theory of several strongly interacting condensed matter systems 
and as a favorite toy model of particle theorists. Some further 
applications of the nematic order parameters, possibly relevant  to gray 
tin or iridates, in the current search for  higher-dimensional interacting 
field theories will also be mentioned.




Helye: BME Fizikai Intézet, Elméleti Fizika Tanszék
Budafoki út 8. F-épület magasföldszint, szemináriumi szoba


Ideje: 2017. május 16. (kedd), 14:15.


Minden érdeklődőt szívesen látunk!




Dóra Balázs