2.1k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR773 papers
- Université Grenoble AlpesFR325 papers
- Institut National des Sciences Appliquées de ToulouseFR210 papers
- Université Joseph FourierFR194 papers
- Université Toulouse III - Paul SabatierFR170 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR134 papers
- CEA GrenobleFR112 papers
- University of WarsawPL87 papers
- Institut NéelFR84 papers
- Charles UniversityCZ80 papers
- Institut Nanosciences et CryogénieFR53 papers
- Institut polytechnique de GrenobleFR48 papers
20 papers · 1 filter
Quantum Oscillations of Electrons and of Composite Fermions in Two Dimensions: Beyond the Luttinger Expansion
S. Curnoe, P. C. E. Stamp
Quantum oscillation phenomena, in conventional 2-dimensional electron systems and in the fractional quantum Hall effect, are usually treated in the Lifshitz-Kosevich formalism. Thi…
Interaction effects at the magnetic-field induced metal-insulator transition in Si/SiGe superlattices
G. Brunthaler, T. Dietl, A. Prinz +7
A metal-insulator transition was induced by in-plane magnetic fields up to 27 T in homogeneously Sb-doped Si/SiGe superlattice structures. The localisation is not observed for perp…
Is the magnetic field necessary for the Aharonov-Bohm effect in mesoscopics?
I. D. Vagner, A. S. Rozhavsky, P. Wyder +1
A new class of topological mesoscopic phenomena in absence of external magnetic field (meso-nucleo-spinics)is predicted, which is based on combined action of the nonequilibrium nuc…
Cu(2) nuclear resonance evidence for an original magnetic phase in aged 60K-superconductors RBa2Cu3O6+x (R=Tm,Y)
A. V. Dooglav, H. Alloul, O. N. Bakharev +7
It is widely believed that the long-range antiferromagnetic order in the RBa2Cu3O6+x compounds (R=Y and rare earths except of Ce, Pr, Tb) is totally suppressed for the oxygen index…
NMR study of the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 : Quantum phase transition and critical dynamics
G. Chaboussant, Y. Fagot-Revurat, M. -H. Julien +5
We present an extensive NMR study of the spin-1/2 antiferromagnetic Heisenberg ladder Cu2(C5H12N2)2Cl4 in a magnetic field range 4.5 - 16.7 T. By measuring the proton NMR relaxatio…
Optical spectroscopy on the spin-Peierls compound CuGeO
P. H. M. van Loosdrecht
An overview is given of Raman and infrared spectroscopic studies of the inorganic spin-Peierls compound CuGeO, with an emphasis on the magnetic fluctuations in the uniform, dim…
Low-Temperature Quantum Relaxation in a System of Magnetic Nanomolecules
Nikolai Prokof'ev, Philip Stamp
We argue that to explain recent resonant tunneling experiments on crystals of Mn and Fe, particularly in the low-T limit, one must invoke dynamic nuclear spin and dipola…
High field study of normal state magneto-transport in the thallium cuprate Tl-2201
A. W. Tyler, Yoichi Ando, F. F. Balakirev +5
We present a study of in-plane normal state magneto-transport in single crystal Tl-2201 in 60T pulsed magnetic fields. In optimally doped samples (Tc ~ 80K) the weak-magnetic-field…
Coherence in the Quasi-Particle 'Scattering' by the Vortex Lattice in Pure Type-II Superconductors
V. N. Zhuravlev, T. Maniv, I. D. Vagner +1
The effect of quasi-particle (QP) 'scattering' by the vortex lattice on the de-Haas van-Alphen oscillations in a pure type-II superconductor is investigated within mean field,asymp…
High frequency EPR spectra of a molecular nanomagnet provide a key to understand Quantum Tunneling of the Magnetization
A. L. Barra, D. Gatteschi, R. Sessoli
EPR spectra have been recorded in very high field, up to 25T, and at high frequency, up to 525 GHz, on a polycristalline sample of Mn12ac (see paper for detailed formula), the firs…
Phasecoherent Transport in PbTe Wide Parabolic Quantum Wells
J. Oswald, G. Span, A. Homer +4
Conductance fluctuations have been observed in macroscopic, quasi 3D PbTe wide quantum wells. A significant increase of the correlation field occurs in a temperature range from 40…
Edge Channel Dominated Magnetotransport in PbTe Wide Parabolic Quantum Wells
J. Oswald, G. Span, A. Homer +4
In PbTe wide parabolic quantum wells (WPQW) a plateau-like structure is observed in the Hall resistance, which corresponds to the Shubnikov-de Haas oscillations in the same manner…
Anomalous magnetotransport in wide quantum wells
J. Oswald, G. Span, A. Homer +4
We present magneto transport experiments of quasi 3D PbTe wide quantum wells. A plateau-like structure in the Hall resistance is observed, which corresponds to the Shubnikov de Haa…
Non Local Transport in PbTe Wide Parabolic Quantum Wells
J. Oswald, G. Heigl, G. Span +4
The results of non-local experiments in different contact configurations are discussed in terms of a non-local behaviour of the contact arms. It is shown that the observed reproduc…
Quenching of the Quantum Hall Effect in PbTe Wide Parabolic Quantum Wells
J. Oswald, G. Heigl, G. Span +4
We show that for the case of a many valley host semiconductor an edge channel (EC) related non-local behaviour can persist also in the 3D-regime where the quantum Hall effect (QHE)…
Conductance Fluctuations in PbTe Wide Parabolic Quantum Wells
J. Oswald, G. Heigl, G. Span +4
We report on conductance fluctuations which are observed in local and non-local magnetotransport experiments. Although the Hall bar samples are of macroscopic size, the amplitude o…
Magnetotransport in wide parabolic PbTe quantum wells
J. Oswald, G. Heigl, M. Pippan +4
The 3D- and 2D- behaviour of wide parabolic PbTe single quantum wells, which consist of PbTe p-n-p-structures, are studied theoretically and experimentally. A simple model combines…
Quantum Computation in Quantum-Hall Systems
V. Privman, I. D. Vagner, G. Kventsel
We describe a quantum information processor (quantum computer) based on the hyperfine interactions between the conduction electrons and nuclear spins embedded in a two-dimensional…
Fractional Quantum Hall Effect Measurements at Zero g-Factor
D. R. Leadley, R. J. Nicholas, D. K. Maude +4
Fractional quantum Hall effect energy gaps have been measured in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is varied by applying hydrostatic pressure up to…
Identification of Nuclear Relaxation Processes in a Gapped Quantum Magnet: Proton NMR in the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4
G. Chaboussant, M. -H. Julien, Y. Fagot-Revurat +4
The proton hyperfine shift K and NMR relaxation rate have been measured as a function of temperature in the S=1/2 Heisenberg antiferromagnetic ladder Cu2(C5H12N2)2Cl4. The…