589 citations · 946 across the 8 of their papers we have counts for
6 papers · 1 filter
Activation gap in the specific heat measurements for He bi-layers
Adam Rançon-Schweiger, Adel Benlagra, Catherine Pépin
Recently, attention has been given to a system of He bi-layers where a quantum criticality similar to the one in heavy fermion compounds has been observed [Science 317, 1356 92…
Model of Quantum Criticality in He3 bilayers Adsorbed on graphite
Adel Benlagra, Catherine Pepin
Recent experiments on He3 bilayers adsorbed on Graphite have shown striking quantum critical properties at the point where the first layer localizes. We model this system with the…
Kondo Breakdown as a Selective Mott Transition in the Anderson Lattice
C. Pepin
We show within the slave boson technique, that the Anderson lattice model exhibits a Kondo breakdown quantum critical point (KB-QCP) where the hybridization goes to zero at zero te…
Quantum critical behavior in itinerant electron systems -- Eliashberg theory and instability of a ferromagnetic quantum-critical point
J. Rech, C. Pepin, A. V. Chubukov
We consider the problem of fermions interacting with gapless long-wavelength collective bosonic modes. The theory describes, among other cases, a ferromagnetic quantum-critical poi…
Supersymmetric approach to the infinite U Hubbard Model
P. Coleman, C. Pepin
We present a preliminary discussion on the use of supersymmetric representation of the Hubbard operator which unifies the slave boson and slave fermion representations into a singl…
How do Fermi liquids get heavy and die?
P. Coleman, C. Pepin, Q. Si +1
We discuss non-Fermi liquid and quantum critical behavior in heavy fermion materials, focussing on the mechanism by which the electron mass appears to diverge at the quantum critic…