Showing 2010 · cond-mat.str-elShow all

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cond-mat.str-el2010★ 258 cited

Majorana edge states in interacting one-dimensional systems

Suhas Gangadharaiah, Bernd Braunecker, Pascal Simon +1

We show that one-dimensional electron systems in proximity of a superconductor that support Majorana edge states are extremely susceptible to electron-electron interactions. Strong…

cond-mat.str-el2010★ 206 cited

Hund's coupling key role in multi-orbital correlations

Luca de' Medici

We show how in multi-band materials, the Hund's coupling plays a crucial role in tuning the degree of electronic correlation. While in half-filled systems it enhances the correlati…

cond-mat.str-el2010★ 32 cited

Application of the S=1 underscreened Anderson lattice model to Kondo uranium and neptunium compounds

Christopher Thomas, Acirete S. da Rosa Simões, J. R. Iglesias +3

Magnetic properties of uranium and neptunium compounds showing the coexistence of Kondo screening effect and ferromagnetic order are investigated within the Anderson lattice Hamilt…

cond-mat.str-el2010★ 10 cited

Lattice softening effects at the Mott critical point of Cr-doped VO

S. Populoh, P. Wzietek, R. Gohier +1

We have performed sound velocity measurements in (VCr)O in the vicinity of the critical point of the first order Mott transition line. The pressure sweeps at co…

cond-mat.str-el2010★ 157 cited

A Microscopic View on the Mott transition in Chromium-doped V2O3

S. Lupi, L. Baldassarre, B. Mansart +18

V2O3 is the prototype system for the Mott transition, one of the most fundamental phenomena of electronic correlation. Temperature, doping or pressure induce a metal to insulator t…

cond-mat.str-el2010★ 32 cited

Mott transition in Cr-doped V2O3 studied by ultrafast reflectivity: electron correlation effects on the transient response

B. Mansart, D. Boschetto, S. Sauvage +2

The ultrafast response of the prototype Mott-Hubbard system (V1-xCrx)2O3 was systematically studied with fs pump-probe reflectivity, allowing us to clearly identify the effects of…

cond-mat.str-el2010★ 11 cited

Condensate-free superfluidity induced by frustrated proximity effect

Nicolas Laflorencie, Frederic Mila

Since the discovery of superfluidity in He4 and Landau's phenomenological theory, the relationship between Bose condensation and superfluidity has been intensely debated. He4 is kn…

cond-mat.str-el2010★ 29 cited

Role of oxygen-oxygen hopping in the three-band copper-oxide model: quasiparticle weight, metal insulator and magnetic phase boundaries, gap values and optical conductivity

Xin Wang, Luca de' Medici, Andrew J. Millis

We investigate the effect of oxygen-oxygen hopping on the three-band copper-oxide model relevant to high- cuprates, finding that the physics is changed only slightly as the ox…

cond-mat.str-el2010★ 143 cited

Statics and dynamics of weakly coupled antiferromagnetic spin-1/2 ladders in a magnetic field

Pierre Bouillot, Corinna Kollath, Andreas M. Läuchli +9

We investigate weakly coupled spin-1/2 ladders in a magnetic field. The work is motivated by recent experiments on the compound (C5H12N)2CuBr4 (BPCB). We use a combination of numer…

cond-mat.str-el2010★ 18 cited

Evidence for charge orbital and spin stripe order in an overdoped manganite

H. Ulbrich, D. Senff, P. Steffens +5

We present diffraction data on a single-layered manganite La(0.42)Sr(1.58)MnO4 with hole doping (x>0.5). Overdoped La(0.42)Sr(1.58)MnO4 exhibits a complex ordering of charges, orbi…

cond-mat.str-el2010★ 26 cited

Field evolution of the magnetic structures in ErTiO through the critical point

H. B. Cao, I. Mirebeau, A. Gukasov +2

We have measured neutron diffraction patterns in a single crystal sample of the pyrochlore compound ErTiO in the antiferromagnetic phase (T=0.3\,K), as a function of th…

cond-mat.str-el2010★ 18 cited

Field-Induced magnetic structures in Tb2Ti2O7 at low temperatures: From spin-ice to spin-flip structures

A. P. Sazonov, A. Gukasov, I. Mirebeau +4

We studied the field-induced magnetic structures of the Tb2Ti2O7 pyrochlore by single-crystal neutron diffraction with a magnetic field applied along a [110] axis, focusing on the…

cond-mat.str-el2010★ 91 cited

Non-equilibrium electronic transport in a one-dimensional Mott insulator

F. Heidrich-Meisner, I. Gonzalez, K. A. Al-Hassanieh +3

We calculate the non-equilibrium electronic transport properties of a one-dimensional interacting chain at half filling, coupled to non-interacting leads. The interacting chain is…

cond-mat.str-el2010

Weakening of antiferromagnetism due to frustration on inhomogeneous 2D lattices

A. Jagannathan

This paper discusses the ground state of quantum spins interacting via Heisenberg antiferromagnetic exchange, in two dimensional lattices having several different local environment…

cond-mat.str-el2010★ 109 cited

Interplay of thermal and quantum spin fluctuations on the kagome lattice

Dirk Wulferding, Peter Lemmens, Patric Scheib +6

We present a Raman spectroscopic investigation of the Herbertsmithite ZnCu3(OH)6Cl2, the first realization of a Heisenberg s=1/2 antiferromagnet on a perfect kagome lattice. The ma…

cond-mat.str-el2010★ 18 cited

Electron-Quasihole Duality and Second Order Differential Equation for Read-Rezayi and Jacks Wavefunctions

Benoit Estienne, B. Andrei Bernevig, Raoul Santachiara

We consider the quasihole wavefunctions of the non-abelian Read-Rezayi quantum Hall states which are given by the conformal blocks of the minimal model WA_{k-1}(k+1,k+2) of the WA_…

cond-mat.str-el2010★ 22 cited

Phase separation versus supersolid behavior in frustrated antiferromagnets

A. Fabricio Albuquerque, Nicolas Laflorencie, Jean-David Picon +1

We investigate the competition between spin-supersolidity and phase separation in a frustrated spin-half model of weakly coupled dimers. We start by considering systems of hard-cor…

cond-mat.str-el2010★ 10 cited

Phase segregation in NaxCoO2 for large Na contents

T. A. Platova, I. R. Mukhamedshin, A. V. Dooglav +1

We have investigated a set of sodium cobaltates (NaxCoO2) samples with various sodium content (0.67 \le x \le 0.75) using Nuclear Quadrupole Resonance (NQR). The four different sta…

cond-mat.str-el2010★ 36 cited

Effect of pressure on the magnetic, transport, and thermal-transport properties of the electron-doped manganite CaMnSbO

Y. Murano, M. Matsukawa, S. Kobayashi +4

We have demonstrated the effect of hydrostatic pressure on magnetic and transport properties, and thermal transport properties in electron-doped manganites CaMnSbO$_{…

cond-mat.str-el2010★ 29 cited

Finite temperature ordering of dilute graphene antiferromagnets

Thomas Fabritius, Nicolas Laflorencie, Stefan Wessel

We employ large-scale quantum Monte Carlo simulations to study the magnetic ordering transition among dilute magnetic moments randomly localized on the graphene honeycomb lattice,…

cond-mat.str-el2010★ 4 cited

Spin rotational symmetry breaking by orbital current patterns in two-leg ladders.

P. Chudzinski, M. Gabay, T. Giamarchi

We investigate the physical consequences of orbital current patterns (OCP) in doped two-leg Cu-O Hubbard ladders. The internal symmetry of the pattern, in the case of the ladder st…

cond-mat.str-el2010★ 9 cited

New electronic orderings observed in cobaltates under the influence of misfit periodicities

A. Nicolaou, V. Brouet, M. Zacchigna +10

We study with ARPES the electronic structure of CoO2 slabs, stacked with rock-salt (RS) layers exhibiting a different (misfit) periodicity. Fermi Surfaces (FS) in phases with diffe…

cond-mat.str-el2010★ 19 cited

Experimental study of the incoherent spectral weight in the photoemission spectra of the misfit cobaltate [Bi2Ba2O4][CoO2]2

A. Nicolaou, V. Brouet, M. Zacchigna +8

Previous ARPES experiments in NaxCoO2 reported both a strongly renormalized bandwidth near the Fermi level and moderately renormalized Fermi velocities, leaving it unclear whether…

cond-mat.str-el2010★ 14 cited

Highest weight Macdonald and Jack Polynomials

Th. Jolicoeur, J. G. Luque

Fractional quantum Hall states of particles in the lowest Landau levels are described by multivariate polynomials. The incompressible liquid states when described on a sphere are f…