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
27 papers · 2 filters
Single crystal structural study of the charge ordered phase of Pr0.6Ca0.4MnO3: electronic localization beyond the atomic level
A. Daoud-Aladine, J. Rodriguez-Carvajal, L. Pinsard-Gaudart +2
In the R1/2D1/2MnO3 manganites (R: rare earth, D: divalent cation), the structural phase transition at Tco is commonly interpreted as a concomitant charge and orbital ordering (CO/…
Susceptibility and dilution effects of the kagome bi-layer geometrically frustrated network. A Ga-NMR study of SrCr_(9p)Ga_(12-9p)O_(19)
L. Limot, P. Mendels, G. Collin +5
We present an extensive gallium NMR study of the geometrically frustrated kagome bi-layer compound SrCr_(9p)Ga_(12-9p)O_(19) (Cr^3+, S=3/2) over a broad Cr-concentration range (.72…
(Sr/Ca)_{14}Cu_{24}O_{41} spin ladders studied by NMR under pressure
Y. Piskunov, D. Jérome, P. Auban-Senzier +5
(63)Cu-NMR measurements have been performed on two-leg hole-doped spin ladders Sr_{14-x}Ca_{x}Cu_{24}O_{41} single crystals (0-x-12) at several pressures up to the pressure domain…
Thermoelectric power of Cerium and Ytterbium intermetallics
V. Zlatic, I. Milat, B. Coqblin +1
Temperature dependence S(T) of the thermoelectric power of metallic systems with cerium and ytterbium ions exhibits some characteristic features, which can be used to classify thes…
Spin fluctuations and pseudogap in the two-dimensional half-filled Hubbard model at weak coupling
N. Dupuis
Starting from the Hubbard model in the weak-coupling limit, we derive a spin-fermion model where the collective spin excitations are described by a non-linear sigma model. This res…
Magnetic excitations in two-leg spin 1/2 ladders: experiment and theory
M. Grueninger, M. Windt, T. Nunner +8
Magnetic excitations in two-leg S=1/2 ladders are studied both experimentally and theoretically. Experimentally, we report on the reflectivity, the transmission and the optical con…
X-ray anomalous scattering investigations on the charge order in -NaVO
S. Grenier, A. Toader, J. E. Lorenzo +8
Anomalous x-ray diffraction studies show that the charge ordering in -NaVO is of zig-zag type in all vanadium ladders. We have found that there are two models of…
Coexistence of Superconductivity and Spin Density Wave orderings in the organic superconductor (TMTSF)_2PF_6
T. Vuletic, P. Auban-Senzier, C. Pasquier +4
The phase diagram of the organic superconductor (TMTSF)_2PF_6 has been revisited using transport measurements with an improved control of the applied pressure. We have found a 0.8…
ESR study of (Sr,La,Ca)_{14}Cu_{24}O_{41}
V. Kataev, K. -Y. Choi, M. Grueninger +4
We report an electron spin resonance (ESR) study of single crystals of the spin-chain spin-ladder compound (Sr,La,Ca)_{14}Cu_{24}O_{41}. The data suggest that in intrinsically hole…
Heat transport in SrCu_2(BO_3)_2 and CuGeO_3
M. Hofmann, T. Lorenz, A. Freimuth +5
In the low dimensional spin systems and the thermal conductivities along different crystal directions show pronounced double-peak structures and strongly…
Optical spectroscopy of (La,Ca)14Cu24O41 spin ladders: comparison of experiment and theory
M. Grueninger, M. Windt, T. Nunner +8
Transmission and reflectivity of La_x Ca_14-x Cu_24 O_41 two-leg spin-1/2 ladders were measured in the mid-infrared regime between 500 and 12000 1/cm. This allows us to determine t…
Interacting fermions in self-similar potentials
J. Vidal, D. Mouhanna, T. Giamarchi
We consider interacting spinless fermions in one dimension embedded in self-similar quasiperiodic potentials. We examine generalizations of the Fibonacci potential known as preciou…
Heavy-fermion and spin-liquid behavior in a Kondo lattice with magnetic frustration
S. Burdin, D. R. Grempel, A. Georges
We study the competition between the Kondo effect and frustrating exchange interactions in a Kondo-lattice model within a large- dynamical mean-field theory. We find a T=…
Magnetic Resonance of Spin Clusters and Triplet Excitations in a Spin-Peierls Magnet with Impurities
V. N. Glazkov, A. I. Smirnov, R. M. Eremina +2
The magnetic resonance spectrum of spin clusters formed in spin-Peierls magnets in the vicinity of impurity ions was investigated. The observed temperature dependences of the effec…
Spin-density-wave instabilities in the organic conductor (TMTSF)_2ClO_4: Role of anion ordering
K. Sengupta, N. Dupuis
We study the spin-density-wave instabilities in the quasi-one-dimensional conductor (TMTSF)_2ClO_4. The orientational order of the anions ClO_4 doubles the unit cell and leads to t…
Work function changes in the double layered manganite La1.2Sr1.8Mn2O7
K. Schulte, M. A. James, L. H. Tjeng +5
We have investigated the behaviour of the work function of La1.2Sr1.8Mn2O7 as a function of temperature by means of photoemission. We found a decrease of 55 +/- 10 meV in going fro…
A new approach to strongly correlated fermion systems: the spin-particle-hole coherent-state path integral
N. Dupuis
We describe a new path integral approach to strongly correlated fermion systems, considering the Hubbard model as a specific example. Our approach is based on the introduction of s…
Electron Spin Resonance of Ni-doped CuGeO in the paramagnetic, spin-Peierls and antiferromagnetic states: Comparison with non-magnetic impurities
B. Grenier, P. Monod, M. Hagiwara +7
We have performed Electron Spin Resonance measurements on single crystals of the doped spin-Peierls compounds CuGeSiO and CuMGeO with M = Zn, Mg, Ni…
Evidence of ultra-slow polaron dynamics in low-doped manganites from 139La NMR-NQR and muon spin rotation
G. Allodi, M. Cestelli Guidi, R. De Renzi +2
We report a 139La NMR investigation of low-doped insulating manganite samples (LaMnO(3+y) and La(1-x)Ca(x)MnO(3+y)) as a function of temperature. A volume fraction with fast nuclea…
Using electronic structure changes to map the H-T phase diagram of alpha'-NaV2O5
A. B. Sushkov, J. L. Musfeldt, S. A. Crooker +2
We report polarized optical reflectance studies of α'-NaV2O5 as a function of temperature (4-45 K) and magnetic field (0-60 T). Rung directed electronic structure changes, as measu…
Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41
M. Windt, M. Grueninger, T. Nunner +8
Phonon-assisted 2-magnon absorption is studied at T=4 K in the spin-1/2 two-leg ladders of Ca_14-x La_x Cu_24 O_41 (x=5 and 4) for polarization of the electrical field parallel to…
Heat transport by lattice and spin excitations in the spin chain compounds SrCuO_2 and Sr_2CuO_3
A. V. Sologubenko, K. Gianno, H. R. Ott +2
We present the results of measurements of the thermal conductivity of the quasi one-dimensional spin S=1/2 chain compound SrCuO_2 in the temperature range between 0.4 and 300 K alo…
Approach to the metal-insulator transition in La(1-x)CaxMnO3 (0<x<.2): magnetic inhomogeneity and spin wave anomaly
G. Biotteau, M. Hennion, F. Moussa +4
We describe the evolution of the static and dynamic spin correlations of LaCaMnO, for x=0.1, 0.125 and 0.2, where the system evolves from the canted magnetic state…
Mott-Superfluid transition in bosonic ladders
P. Donohue, T. Giamarchi
We show that in a commensurate bosonic ladder, a quantum phase transition occurs between a Mott insulator and a superfluid when interchain hopping increases. We analyse the propert…