272 citations · 809 across the 33 of their papers we have counts for
20 papers · 1 filter
Incoherent transport in a model for the strange metal phase: Memory-matrix formalism
Emile Pangburn, Anurag Banerjee, Hermann Freire +1
We revisit a phenomenological model of fermions coupled to fluctuating bosons that emerges from finite-momentum particle-particle pairs for describing the strange metal phase in th…
Pole structure of the electronic self-energy with coexistence of Charge order and Superconductivity
Maxence Grandadam, Catherine Pépin
We compare the pole structure of the electronic Green's function obtained by Cluster Dynamical Mean Field Theory to the results from the fractionalized Pair Density Wave idea. In t…
Anisotropic Kondo pseudo-gap in URu2Si2
J. Buhot, X. Montiel, Y. Gallais +8
A polarized electronic Raman scattering study reveals the emergence of symmetry dependence in the electronic Raman response of single crystalline URuSi below the Kondo…
Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
Carlene Farias, Christopher Thomas, Catherine Pépin +3
An -symmetric generalization of the Heisenberg model for quantum spin operators is used to investigate the geometrically frustrated body-centered tetragonal (BCT)…
Strong competition between -loop-current order and -wave charge order along the diagonal direction in a two-dimensional hot spot model
Vanuildo S. de Carvalho, Thomas Kloss, Xavier Montiel +2
We study the fate of the so-called -loop-current order that breaks both time-reversal and parity symmetries in a two-dimensional hot spot model with antiferromagnetically m…
Renormalization group analysis of the pair-density-wave and charge order within the fermionic hot-spot model for cuprate superconductors
Hermann Freire, Vanuildo S. de Carvalho, Catherine Pépin
In light of the new experimental and theoretical important developments in high- superconductivity, we revisit the fermionic hot-spot model relevant to the phenomenology of th…
Pairing gaps near ferromagnetic quantum critical points
Matthias Einenkel, Hendrik Meier, Catherine Pépin +1
We address the quantum-critical behavior of a two-dimensional itinerant ferromagnetic systems described by a spin-fermion model in which fermions interact with close to critical bo…
Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
Sébastien Burdin, Christopher Thomas, Catherine Pépin +2
The quantum Heisenberg model is studied in the geometrically frustrated body-centered tetragonal lattice(BCT lattice) with antiferromagnetic interlayer coupling J1 and intralayer f…
Modulated Spin Liquid and Magnetic Order from a Kondo-Heisenberg model applied to
X. Montiel, S. Burdin, C. Pépin +1
Within the framework of the Kondo-Heisenberg model, we analyse the effect of charge fluctuation on the modulated spin liquid (MSL) and antiferromagnetic (AF) orders which were esta…
Cascade of phase transitions in the vicinity of a quantum critical point
H. Meier, C. Pépin, M. Einenkel +1
We study the timely issue of charge order checkerboard patterns observed in a variety of cuprate superconductors. We suggest a minimal model in which strong quantum fluctuations in…
Effect of magnetic field on competition between superconductivity and charge order below the pseudogap state
H. Meier, M. Einenkel, C. Pépin +1
We theoretically investigate the T-B phase diagram of cuprates building on the SU(2) pseudogap order recently obtained from the spin-fermion model. At low temperatures, our analysi…
Pseudogap state from quantum criticality
K. B. Efetov, H. Meier, C. Pépin
Upon application of an external tuning parameter, a magnetic state can be driven to a normal metal state at zero temperature. This phenomenon is known as quantum criticality and le…
3D Modulated Spin Liquid model applied to URuSi
Christopher Thomas, Sébastien Burdin, Catherine Pépin +1
We have developed a 3D version for the Modulated Spin Liquid in a body-centered tetragonal lattice structure to describe the hidden order observed in URuSi at $T_0\approx17…
Low energy excitations and singular contributions in the thermodynamics of clean Fermi liquids
H. Meier, C. Pépin, K. B. Efetov
Using a recently suggested method of bosonization in an arbitrary dimension, we study the anomalous contribution of the low energy spin and charge excitations to thermodynamic quan…
Preformed heavy-electrons at the Quantum Critical Point in heavy fermion compounds
Minh-Tien Tran, A. Benlagra, C. Pépin +1
The existence of multiple energy scales is regarded as a signature of the Kondo breakdown mechanism for explaining the quantum critical behavior of certain heavy fermion compounds,…
Describing systems of interacting fermions by boson models: exact mapping in arbitrary dimension and applications
K. B. Efetov, C. Pépin, H. Meier
We develop a new method that allows us to map models of interacting fermions onto bosonic models describing collective excitations in an arbitrary dimension. This mapping becomes e…
He3 bi-layers as a simple example of de-confinement
Adel Benlagra, Catherine Pépin
We consider the recent experiments on He3 bi-layers, showing evidence for a quantum critical point (QCP) at which the first layer localizes. Using the Anderson lattice in two dimen…
Critical phenomena near the antiferromagnetic quantum critical point of Heavy-Fermions
M. Lavagna, C. Pépin
We present a study of the critical phenomena around the quantum critical point in heavy-fermion systems. In the framework of the S=1/2 Kondo lattice model, we introduce an extended…
Spin Dynamics near the Quantum Critical Point of Heavy-Fermions
C. Pepin, M. Lavagna
The dynamical spin susceptibility is studied in the magnetically-disordered phase of heavy-Fermion systems near the antiferromagnetic quantum phase transition. In the framework of…
Supersymmetry and Theory of Heavy-Fermions
C. Pépin, M. Lavagna
We propose a new approach to the Kondo lattice in order to describe simultaneously the Kondo effect and the local magnetism. This approach relies on an original representation of t…