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Aspects of Ising-nematic quantum critical point

Ipsita Mandal
Perimeter Institute/IITKharaghpur

We devise a renormalization group analysis for quantum field theories
with Fermi surface to study scaling behaviour of non-Fermi liquid
states in a controlled approximation. The non-Fermi liquid fixed
points are identified from a Fermi surface in (m+1) spatial
dimensions, while the co-dimension of Fermi surface is also extended
to a generic value. We also study superconducting instability in such
systems as a function of dimension and co-dimension of the Fermi
surface. The key point in this whole analysis is that unlike in
relativistic QFT, the Fermi momentum $k_F$ enters as a dimensionful
parameter, thus modifying the naive scaling arguments. The effective
coupling constants are found to be combinations of the original
coupling constants and $k_F$.

Tuesday, 23 August, 2016 - 11:00
Seminar Location: 
V-221, Pav. Roger-Gaudry, UdeM
Refreshments Time and Location: 
V-214 10:45, coffee and cookies

Groupe de Physique des particules
​Université de Montréal
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Montréal, QC H3C 3J7
Tél : 514-343-5607
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