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
Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet
T. Maniv, Yu. A. Bychkov, I. D. Vagner +1
A scenario of quantum computing process based on the manipulation of a large number of nuclear spins in Quantum Hall (QH) ferromagnet is presented. It is found that vacuum quantum…
Field-induced metal-insulator transition in a two-dimensional organic superconductor
J. Wosnitza, S. Wanka, J. Hagel +9
The quasi-two-dimensional organic superconductor beta-(BEDT-TTF)_2SF_5CH_2CF_2SO_3 (T_c approx 4.4 K)shows very strong Shubnikov-de Haas (SdH) oscillations which are superimposed o…
Phonon-assisted tunneling in the quantum regime of Mn12-ac
I. Chiorescu, R. Giraud, A. G. M. Jansen +2
Longitudinal or transverse magnetic fields applied on a crystal of Mn12-ac allows to observe independent tunnel transitions between m=-S+p and m=S-n-p (n=6-10, p=0-2 in longitudina…
Nuclear-spin qubits interaction in mesoscopic wires and rings
Yu. V. Pershin, I. D. Vagner, P. Wyder
Theoretical study of the indirect coupling of nuclear spins (qubits) embedded into a mesoscopic ring and in a finite length quantum wire in a magnetic field is presented. It is fou…
Glassy Spin Freezing and NMR Wipeout Effect in the High-T_c Superconductor La1.90Sr0.10CuO4: What is the Relationship With Stripes ?
M. -H. Julien, A. Campana, A. Rigamonti +9
We report on 139La and 63Ccu NMR/NQR measurements in the high-Tc superconductor La1.90Sr0.10CuO4 with Tc=26.5 K. Spin fluctuations probed by 139La spin-lattice relaxation (T1), con…
Magnetic Field Induced Low-Energy Spin Excitations in YBa2Cu4O8 Measured by High Field Gd3+ ESR
Titusz Feher, Andras Janossy, Gabor Oszlanyi +5
We have measured the spin susceptibility of the underdoped high temperature superconductor, YBa2Cu4O8 by Gd^{3+} electron spin resonance in single crystals and aligned powders at s…
Quantum Size Effect transition in percolating nanocomposite films
B. Raquet, M. Goiran, N. Negre +3
We report on unique electronic properties in Fe-SiO2 nanocomposite thin films in the vicinity of the percolation threshold. The electronic transport is dominated by quantum correct…
Quantum Hall effect at low magnetic fields due to electron-electron interaction: A Comment on cond-mat/9906450 (published in Phys. Rev. Lett. 84, 3141 (2000))
S. S. Murzin, A. G. M. Jansen
In a recent preprint cond-mat/9906450 (published in PRL 84, 3141 (2000)) Bodo Huckestein showed that at real experimental conditions it is not possible to observe the quantum Hall…
Experimental evidence for the formation of stripe phases in Si/SiGe
U. Zeitler, H. W. Schumacher, A. G. M. Jansen +1
We observe pronounced transport anisotropies in magneto-transport experiments performed in the two-dimensional electron system of a Si/SiGe heterostructure. They occur when an in-p…
InAs-AlSb quantum wells in tilted magnetic fields
S. Brosig, K. Ensslin, A. G. Jansen +4
InAs-AlSb quantum wells are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. Using the coincidence method we find for magnetic fie…
Mesoscopic Spin Tunneling in Molecular Crystals
B. Barbara, I. Chiorescu, R. Giraud +2
The phenomenon of Quantum Tunneling of Mesoscopic Spins is reviewed in the light of the behavior of the archetype of these systems: the molecular complex Mn12-ac. Most observations…
Charge, Orbital and Magnetic Order in Nd0.5Ca0.5MnO3
F. millange, S. de Brion, G. Chouteau
In the manganite Nd0.5Ca0.5MnO3, charge ordering occurs at much higher temperature than the antiferromagnetic order (TCO=250K,TN=160K). The magnetic behavior of the phase TN<T<TCO…
On the electron scattering and dephasing by the nuclear spins
A. M. Dyugaev, I. D. Vagner, P. Wyder
We show that scattering of the conduction electrons by nuclear spins via the hyperfine interaction may lead the upper limit on the mean free path in clean metals. Nuclear spins wit…
Magnetoresistance and electronic structure of asymmetric GaAs/AlGaAs double quantum wells in the in-plane/tilted magnetic field
O. N. Makarovskii, L. Smrcka, P. Vasek +3
Bilayer two-dimensional electron systems formed by a thin barrier in the GaAs buffer of a standard heterostructure were investigated by magnetotransport measurements. In magnetic f…
Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects
P. Mendels, A. Keren, L. Limot +3
We present the first Ga(4f) NMR study of the Cr susceptibility in the archetype of Kagome based frustrated antiferromagnets, SrCrGaO. Our major finding is that t…
NMR evidence for a "generalized spin-Peierls transition" in the high magnetic field phase of the spin-ladder Cu2(C5N2H12)2Cl4
H. Mayaffre, M. Horvatic, C. Berthier +4
The magnetic field-induced 3D ordered phase of the two-leg spin-ladder Cu2(C5N2H12)2Cl4 has been probed through measurements of 1H NMR spectra and 1/T1 in the temperature range 70~…
Magnetic field - temperature phase diagram of the organic conductor alpha-(BEDT-TTF)2KHg(SCN)4
P. Christ, W. Biberacher, M. V. Kartsovnik +4
We present systematic magnetic torque studies of the ``magnetic field - temperature'' phase diagram of the layered organic conductor alpha-(BEDT-TTF)2KHg(SCN)4 at fields nearly per…
Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots
I. Hapke-Wurst, U. Zeitler, H. Frahm +3
Current steps attributed to resonant tunneling through individual InAs quantum dots embedded in a GaAs-AlAs-GaAs tunneling device are investigated experimentally in magnetic fields…
Magnetic pair-breaking in superconducting (Ba,K)BiO_3 investigated by magnetotunneling
P. Szabo, P. Samuely, A. G. M. Jansen +2
The de Gennes and Maki theory of gapless superconductivity for dirty superconductors is used to interpret the tunneling measurements on the strongly type-II high-Tc oxide-supercond…
Nuclear Spin Qubit Dephasing Time in the Integer Quantum Hall Effect Regime
D. Mozyrsky, V. Privman, I. D. Vagner
We report the first theoretical estimate of the nuclear-spin dephasing time T_2 owing to the spin interaction with the two-dimensional electron gas, when the latter is in the integ…