Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR10.1k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR4.1k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR3.2k papers
- Université Paris-SaclayFR3.1k papers
- National Institute for Subatomic PhysicsNL2k papers
- University of ManchesterGB2k papers
- Sapienza University of RomeIT2k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT1.9k papers
- CEA Paris-SaclayFR1.9k papers
- Heidelberg UniversityDE1.8k papers
- Rutherford Appleton LaboratoryGB1.8k papers
- Laboratoire de Physique Nucléaire et de Hautes ÉnergiesFR1.8k papers
25 papers · 2 filters
The Hubbard model at half-filling, part III: the lower bound on the self-energy
Stephane Afchain, Jacques Magnen, Vincent Rivasseau
We complete the proof that the two-dimensional Hubbard model at half-filling is not a Fermi liquid in the mathematically precise sense of Salmhofer, by establishing a lower bound o…
Origin of Colossal Dielectric Response of Pr(0.6)Ca(0.4)MnO(3)
N. Biskup, A. de Andres, J. L. Martinez +1
We report the detailed study of dielectric response of Pr(0.6)Ca(0.4)MnO(3) (PCMO), member of manganite family showing colossal magnetoresistance. Measurements have been performed…
Mott insulator to superfluid transition in the Bose-Hubbard model: a strong-coupling approach
K. Sengupta, N. Dupuis
We present a strong-coupling expansion of the Bose-Hubbard model which describes both the superfluid and the Mott phases of ultracold bosonic atoms in an optical lattice. By perfor…
Momentum anisotropy of the scattering rate in cuprate superconductors
A. Kaminski, H. M. Fretwell, M. R. Norman +12
We examine the momentum and energy dependence of the scattering rate of the high temperature cuprate superconductors using angle resolved photoemission spectroscopy. The scattering…
Orientation-dependent C60 electronic structures revealed by photoemission
V. Brouet, W. L. Yang, X. J. Zhou +7
We observe, with angle-resolved photoemission, a dramatic change in the electronic structure of two C60 monolayers, deposited respectively on Ag (111) and (100) substrates, and sim…
Structural aspects of the metal-insulator transition in BaVS3
S. Fagot, P. Foury-Leylekian, S. Ravy +5
A sequence of structural transitions occurring in the quasi-one-dimensional (1D) 3d1 system BaVS3 at low temperature was investigated by high resolution synchrotron X-ray diffracti…
Dynamical singlets and correlation-assisted Peierls transition in VO2
S. Biermann, A. Poteryaev, A. I. Lichtenstein +1
A theory of the metal-insulator transition in vanadium dioxide from the high-temperature rutile to the low- temperature monoclinic phase is proposed on the basis of cluster dynamic…
Ground state of a two dimensional quasiperiodic antiferromagnet
A. Jagannathan
We consider the spin 1/2 Heisenberg antiferromagnet on a two dimensional quasiperiodic tiling. The T=0 state is long range ordered, with an inhomogeneous distribution of the stagge…
Renormalization of the 2-point function of the Hubbard model at half-filling
Stephane Afchain, Jacques Magnen, Vincent Rivasseau
We prove that the two dimensional Hubbard model at finite temperature T and half-filling is analytic in the coupling constant in a radius at least . We also study the…
SR study of the quantum dynamics in the frustrated kagome bilayers
David Bono, P. Mendels, G. Collin +5
We present SR experiments in the kagome bilayer compound BaSnZnGaCrO (BSZCGO) and compare it to the isostructural SrCrGa$…
Transport properties of single channel quantum wires with an impurity: Influence of finite length and temperature on average current and noise
Fabrizio Dolcini, Bjoern Trauzettel, Ines Safi +1
The inhomogeneous Tomonaga Luttinger liquid model describing an interacting quantum wire adiabatically coupled to non-interacting leads is analyzed in the presence of a weak impuri…
Study of one-dimensional nature of (Sr,Ba)_2Cu(PO_4)_2 and BaCuP_2O_7 via 31P NMR
R. Nath, A. V. Mahajan, N. Buttgen +2
The magnetic behavior of the low-dimensional phosphates (Sr,Ba)_2 Cu(PO_4)_2 and BaCuP_2O_7 was investigated by means of magnetic susceptibility and ^{31}P nuclear magnetic resonan…
High-pressure transport properties of CeRu_2Ge_2
H. Wilhelm, D. Jaccard, V. Zlatic +3
The pressure-induced changes in the temperature-dependent thermopower S(T) and electrical resistivity ρ(T) of CeRu_2Ge_2 are described within the single-site Anderson model. The Ce…
Percolative phase transition on ferromagnetic insulator manganites: uncorrelated to correlated polaron clusters
A. M. L. Lopes, J. P. Araujo, J. J. Ramasco +5
In this work, we report an atomic scale study on the ferromagnetic insulator manganite LaMnO using PAC spectroscopy. Data analysis reveals a nanoscopic transition fr…
Structural aspects of metamagnetism in Ca_{2-x}Sr_{x}RuO_4 (0.2 < x < 0.5): field tuning of orbital occupation
M. Kriener, P. Steffens, J. Baier +12
The crystal structure of Ca_{2-x}Sr_xRuO_4 with 0.2 < x < 1.0 has been studied by diffraction techniques and by high resolution capacitance dilatometry as a function of temperature…
Stretched exponential behavior in remanent lattice striction of a (La,Pr)SrMnO bilayer manganite single crystal
M. Matsukawa, M. Chiba, R. Suryanarayanan +4
We have investigated the time dependence of remanent magnetostriction in a (La,Pr)SrMnO single crystal, in order to examine the slow dynamics of lattice…
Self-Consistent Random Phase Approximation - Application to the Hubbard Model for finite number of sites
Mohsen Jemai, Peter Schuck, Jorge Dukelsky +1
Within the 1D Hubbard model linear closed chains with various numbers of sites are considered in Self Consistent Random Phase Approximation (SCRPA). Excellent results with a minima…
Universality and Critical Behavior at the Mott transition
P. Limelette, A. Georges, D. Jerome +3
We report conductivity measurements of Cr-doped V2O3 using a variable pressure technique. The critical behavior of the conductivity near the Mott-insulator to metal critical endpoi…
Quantum Critical Point in the Spin Glass-Kondo Transition in Heavy Fermion Systems
Alba Theumann, B. Coqblin
The Kondo-Spin Glass competition is studied in a theoretical model of a Kondo lattice with an intra-site Kondo type exchange interaction treated within the mean field approximation…
Fermi Surface reconstruction in the CDW state of CeTe3 observed by photoemission
V. Brouet, W. L. Yang, X. J. Zhou +5
CeTe3 is a layered compound where an incommensurate Charge Density Wave (CDW) opens a large gap (400 meV) in optimally nested regions of the Fermi Surface (FS), whereas other secti…
Dynamical Mean Field Theory with the Density Matrix Renormalization Group
Daniel J. Garcia, Karen Hallberg, Marcelo J. Rozenberg
A new numerical method for the solution of the Dynamical Mean Field Theory's self-consistent equations is introduced. The method uses the Density Matrix Renormalization Group techn…
23Na NMR Evidence for Charge Order and Anomalous Magnetism in NaxCoO2
I. R. Mukhamedchine, H. Alloul, G. Collin +1
We have compared by Na NMR and magnetic susceptibility the magnetic properties of oriented powder samples of NaCoO compounds. The NMR spectra are found identical…
Intrinsic susceptibility and bond defects in the novel 2D frustrated antiferromagnet BaSnZnCrGaO
David Bono, Philippe Mendels, Gaston Collin +1
We present microscopic and macroscopic magnetic properties of the highly frustrated antiferromagnet BaSnZnCrGaO, respectively probed with NMR an…
Appearance of fractional charge in the noise of non-chiral Luttinger liquids
B. Trauzettel, I. Safi, F. Dolcini +1
The current noise of a voltage biased interacting quantum wire adiabatically connected to metallic leads is computed in presence of an impurity in the wire. We find that in the wea…