B. Sriram Shastry (Special Seminar)

Date/Time
Date(s) - Dec 4 2013
10:30 AM - 11:30 AM

Location
McCullough Building, Room 335

Category(ies)


Theory of Extremely Correlated Fermi Liquids

B Sriram Shastry

 

Professor of Physics,  University of California, Santa Cruz

 

 Abstract:

 A newly developed theory is presented for dealing with Gutzwiller projected electrons- in the context of the t-J model. The method uses Schwinger’s ideas to bypass the difficulties arising from the  non-canonical Gutzwiller projected electrons that make the  Feynman series  useless. 

 In applying these ideas to the t-J model, one generically finds a Fermi liquid ground state, but with large corrections to the Landau theory  asymptotic behavior. We obtain Im Sigma(w,T) = c (w^2 + T^2)( 1- w/w_0)+..  so that the particle hole symmetry is violated by the odd in “w” term with a rather small w_0 energy scale. 

By way of applications of the theoretical methodology, I present comparisons with the ARPES lines shapes, dispersion curves and the kinks in the spectrum at optimal and slightly overdoped limits of the cuprates.  An excellent fit with data is found, and also interesting predictions for future experiments are made. 

 References:

“ Extremely Correlated Fermi Liquids ”, B. S. Shastry, arXiv:1102.2858 (2011),Phys. Rev. Letts. 107, 056403 (2011).

 “Extremely correlated Fermi liquid theory meets Dynamical mean-field theory: Analytical insights into the doping-driven Mott transition”, R. Zitko, D. Hansen, E. Perepelitsky, J. Mravlje, A. Georges and B. S. Shastry, arXiv:1309.5284 (2013).