Publications associées à Séparation spin-charge

Fractional excitations in the square-lattice quantum antiferromagnet

Henrik Moodysson Rønnow, Dmitri Ivanov, Bastien Dalla Piazza, Goran Nilsen, Martin Mourigal, Mechthild Enderle

Quantum magnets have occupied the fertile ground between many-body theory and low-temperature experiments on real materials since the early days of quantum mechanics. However, our understanding of even deceptively simple systems of interacting spin-1/2 par ...

Nature Publishing Group2015

Direct measurement of the bulk spin structure of noncentrosymmetric BiTeCl

Jan Hugo Dil, Stefan Peter Muff

A strong spin-orbit interaction leads to a Rashba-type splitting of the bulk bands of BiTeCl, which results in toroidal Fermi surfaces with distinct spin structures depending on the chemical potential. Here, we present spin-and angle-resolved photoelectron ...

American Physical Society2015

Probing the dynamics of plasmon-excited hexanethiol-capped gold nanoparticles by picosecond X-ray absorption spectroscopy

Majed Chergui, Thomas James Penfold, Jochen Rittmann

Picosecond X-ray absorption spectroscopy (XAS) is used to investigate the electronic and structural dynamics initiated by plasmon excitation of 1.8 nm diameter Au nanoparticles (NPs) functionalised with 1-hexanethiol. We show that 100 ps after photoexcitat ...

Royal Society of Chemistry2014

Interplay of Dirac fermions and heavy quasiparticles in solids

Thorsten Schmitt

Many-body interactions in crystalline solids can be conveniently described in terms of quasiparticles with strongly renormalized masses as compared with those of non-interacting particles. Examples of extreme mass renormalization are on the one hand graphe ...

Nature Publishing Group2013

Experimental evidence for Luttinger liquid behavior in sufficiently long GaAs V-groove quantum wires

Elyahou Kapon, Alok Rudra, Benjamin Dwir

We have measured the temperature dependence of the conductance of long V-groove quantum wires fabricated using GaAs/AlGaAs heterostructures, in a wide temperature range (200 mK < T < 4.2 K). We find that for our quantum wires the Fermi velocity can be as l ...

2012

Spin-orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3

Henrik Moodysson Rønnow, Thorsten Schmitt, Martin Mourigal, Jean-Sebastien Caux

When viewed as an elementary particle, the electron has spin and charge. When binding to the atomic nucleus, it also acquires an angular momentum quantum number corresponding to the quantized atomic orbital it occupies. Even if electrons in solids form ban ...

2012

Spin-Orbital Quantum Liquid on the Honeycomb Lattice

Frédéric Mila, Karlo Penc, Miklos Lajko

The main characteristic of Mott insulators, as compared to band insulators, is to host low-energy spin fluctuations. In addition, Mott insulators often possess orbital degrees of freedom when crystal-field levels are partially filled. While in the majority ...

2012

Femtosecond UV Studies of the Electronic Relaxation Processes in Cytochrome c

Majed Chergui, Andrea Cannizzo, Cristina Consani

We report on an experimental study with UV and visible ultrafast time-gated emission and transient absorption of the early photodynamics of horse heart Cytochrome c in both ferric and ferrous redox states. A clear separation in time and energy of tryptopha ...

2011

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Séparation spin-charge

Fractional excitations in the square-lattice quantum antiferromagnet

Direct measurement of the bulk spin structure of noncentrosymmetric BiTeCl

Probing the dynamics of plasmon-excited hexanethiol-capped gold nanoparticles by picosecond X-ray absorption spectroscopy

Interplay of Dirac fermions and heavy quasiparticles in solids

Experimental evidence for Luttinger liquid behavior in sufficiently long GaAs V-groove quantum wires

Spin-orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3

Spin-Orbital Quantum Liquid on the Honeycomb Lattice

Femtosecond UV Studies of the Electronic Relaxation Processes in Cytochrome c

On Zero-Dimensional Exciton-Polaritons

Phase diagram and continuous pair-unbinding transition of the bilinear-biquadratic S=1 Heisenberg chain in a magnetic field

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Chattez avec Graph Search

Direct measurement of the bulk spin structure of noncentrosymmetric BiTeCl

Fractional excitations in the square-lattice quantum antiferromagnet

Probing the dynamics of plasmon-excited hexanethiol-capped gold nanoparticles by picosecond X-ray absorption spectroscopy

On Zero-Dimensional Exciton-Polaritons

Interplay of Dirac fermions and heavy quasiparticles in solids

Spin-orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3

Experimental evidence for Luttinger liquid behavior in sufficiently long GaAs V-groove quantum wires

Phase diagram and continuous pair-unbinding transition of the bilinear-biquadratic S=1 Heisenberg chain in a magnetic field

Spin-Orbital Quantum Liquid on the Honeycomb Lattice

Femtosecond UV Studies of the Electronic Relaxation Processes in Cytochrome c