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Showing 2013 · cond-mat.str-elShow all

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cond-mat.str-el2013

Doping evolution of the electron-hole asymmetric s-wave pseudogap in underdoped high-Tc cuprate superconductors

Shiro Sakai, Marcello Civelli

We study the doping evolution of the electronic structure in the pseudogap state of high-Tc cuprate superconductors, by means of a cluster extension of the dynamical mean-field the…

cond-mat.str-el2013★ 13 cited

Hybridizing localized and itinerant electrons: a recipe for pseudogaps

E. A. Winograd, L. de' Medici

In a system where selective Mott localization is realized, some electrons show a gap to charge excitations while others do not. A hybridization between these two kind of electrons…

cond-mat.str-el2013★ 6 cited

NMR investigation of the pressure induced Mott transition to superconductivity in Cs3C60 isomeric compounds

Henri Alloul, Yoshihiko Ihara, Takeshi Mito +4

The discovery in 1991 of high temperature superconductivity (SC) in A3C60 compounds, where A is an alkali ion, has been initially ascribed to a BCS mechanism, with a weak incidence…

cond-mat.str-el2013

Fractional quantum Hall states in charge-imbalanced bilayer systems

N. Thiebaut, N. Regnault, M. O. Goerbig

We study the fractional quantum Hall effect in a bilayer with charge-distribution imbalance induced, for instance, by a bias gate voltage. The bilayer can either be intrinsic or it…

cond-mat.str-el2013★ 26 cited

Charge-Ordering Transition in (TMTTF)X Explored via Dilatometry

Mariano de Souza, Jean-Paul Pouget

Charge-ordering phenomena have been highly topical over the last few years. A phase transition towards a charge ordered state has been observed experimentally in several classes of…

cond-mat.str-el2013★ 4 cited

Many-body study of a quantum point contact in the fractional quantum Hall regime at v=5/2

Paul Soulé, Thierry Jolicoeur, Philippe Lecheminant

We study a quantum point contact in the fractional quantum Hall regime at Landau level filling factors 1/3 and 5/2. By using exact diagonalizations in the cylinder geometry we iden…

cond-mat.str-el2013★ 14 cited

Magnetic responses of randomly depleted spin ladders

Arthur Lavarélo, Guillaume Roux, Nicolas Laflorencie

The magnetic responses of a spin-1/2 ladder doped with non-magnetic impurities are studied using various methods and including the regime where frustration induces incommensurabili…

cond-mat.str-el2013★ 139 cited

Gapless spin liquid ground state in the S=1/2 vanadium oxyfluoride kagome antiferromagnet [NH4]2[C7H14N][V7O6F18]

L. Clark, J. C. Orain, F. Bert +10

The vanadium oxyfluoride [NH4]2[C7H14N][V7O6F18] (DQVOF) is a geometrically frustrated magnetic bilayer material. The structure consists of S=1/2 kagome planes of V4+ d1 ions with…

cond-mat.str-el2013★ 35 cited

Evidence for the coexistence of Dirac and massive carriers in a-(BEDT-TTF)2I3 under hydrostatic pressure

M. Monteverde, M. O. Goerbig, P. Auban-Senzier +5

Transport measurements were performed on the organic layered compound \aI3 under hydrostatic pressure. The carrier types, densities and mobilities are determined from the magneto-c…

cond-mat.str-el2013★ 30 cited

Nature of the bad metallic behavior of Fe_{1.06}Te inferred from its evolution in the magnetic state

Ping-Hui Lin, Y. Texier, A. Taleb-Ibrahimi +5

We investigate with angle resolved photoelectron spectroscopy the change of the Fermi Surface (FS) and the main bands from the paramagnetic (PM) state to the antiferromagnetic (AFM…

cond-mat.str-el2013

Anisotropic propagative excitations and quadrupolar effects in TbTiO

Solène Guitteny, Julien Robert, Pierre Bonville +7

The dynamical magnetic correlations in \tbti\, have been investigated using polarized inelastic neutron scattering. Dispersive excitations are observed, emerging from pinch points…

cond-mat.str-el2013★ 16 cited

Low temperature structural effects in the (TMTSF)PF and AsF Bechgaard salts

P. Foury-Leylekian, S. Petit, I. Mirebeau +6

We present a detailed low-temperature investigation of the statics and dynamics of the anions and methyl groups in the organic conductors (TMTSF)PF and (TMTSF)AsF (…

cond-mat.str-el2013★ 125 cited

Resistive switching induced by electronic avalanche breakdown in GaTaSeTe narrow gap Mott Insulators

Vincent Guiot, Laurent Cario, Etienne Janod +6

Mott transitions induced by strong electric fields are receiving a growing interest. Recent theoretical proposals have focused on the Zener dielectric breakdown in Mott insulators,…

cond-mat.str-el2013★ 65 cited

Dzyaloshinsky-Moriya interaction in vesignieite: A route to freezing in a quantum kagome antiferromagnet

A. Zorko, F. Bert, A. Ozarowski +4

We report an electron spin resonance investigation of the geometrically frustrated spin-1/2 kagome antiferromagnet vesignieite, BaCuVO(OH). Analysis of the line wid…

cond-mat.str-el2013★ 42 cited

Melting of the orbital order in LaMnO3 probed by NMR

A. Trokiner, S. Verkhovskii, A. Gerashenko +4

The Mn spin correlations were studied near the O'-O phase transition at T{JT} = 750 K, up to 950 K with 17O and 139La NMR in a stoichiometric LaMnO3 crystalline sample. The measure…

cond-mat.str-el2013★ 80 cited

Mott-Hubbard transition in V2O3 revisited

P. Hansmann, A. Toschi, G. Sangiovanni +4

The isostructural metal-insulator transition in Cr-doped V2O3 is the textbook example of a Mott-Hubbard transition between a paramagnetic metal and a paramagnetic insulator. We rev…

cond-mat.str-el2013★ 8 cited

Structural transitions in a doped lanthanum cuprate

S. -H. Baek, P. C. Hammel, M. Hücker +4

139La NMR and relaxation measurements have been performed on La{1.8-x}Eu{0.2}Sr{x}CuO{4} (x = 0.13 and 0.2) single crystals. The temperature dependence of the 139La NMR spectra in…

cond-mat.str-el2013

The 1D Heisenberg antiferromagnet model by the variation after projection method

Aziz Rabhi, Marta Brajczewska, Peter Schuck +2

The 4 sites and 8 sites 1D anti-ferromagnetic Heisenberg chains in the Jordan-Wigner representation are investigated within the standard Hartree-Fock and RPA approaches, both in th…

cond-mat.str-el2013★ 66 cited

Large temperature dependence of the number of carriers in Co-doped BaFe2As2

V. Brouet, Ping-Hui Lin, Y. Texier +10

Using angle-resolved photoemission spectroscopy, we study the evolution of the number of carriers in Ba(Fe(1-x)Cox)2As2 as a function of Co content and temperature. We show that th…

cond-mat.str-el2013★ 17 cited

Ultrafast filling of an electronic pseudogap in an incommensurate crystal

V. Brouet, J. Mauchain, E. Papalazarou +11

We investigate the quasiperiodic crystal (LaS)1.196(VS2) by angle and time resolved photoemission spectroscopy. The dispersion of electronic states is in qualitative agreement with…