L. P. Levy

NMR Determination of 2D Electron Spin Polarization at $\nu=1/2$ (1999)

Melinte, S., Freytag, N., Horvatic, M., Berthier, C., Levy, L. P., Bayot, V., ...

Using a `standard' NMR spin-echo technique we determined the spin polarization of two-dimensional electrons, confined to GaAs quantum wells, from the hyperfine shift of Ga nuclei in the wells....

Zero Temperature Phase Transition in Spin-ladders: Phase Diagram and Dynamical studies of Cu(Hp)Cl (1998)

Chaboussant, G., Fagot-Revurat, Y., Hanson, M. E., Levy, L. P., Berthier, C., ...

In a magnetic field, spin-ladders undergo two zero-temperature phase transitions at the critical fields Hc1 and Hc2. An experimental review of static and dynamical properties of spin-ladders close to...

NMR study of the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 : Quantum phase transition and critical dynamics (1997)

Chaboussant, G., Fagot-Revurat, Y., Hanson, M. E., Berthier, C., Horvatic, M., ...

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 relaxation rate 1/T_1 and...

Identification of Nuclear Relaxation Processes in a Gapped Quantum Magnet: Proton NMR in the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 (1997)

Chaboussant, G., Fagot-Revurat, Y., Levy, L. P., Berthier, C., Horvatic, M., ...

The proton hyperfine shift K and NMR relaxation rate $1/T_1$ have been measured as a function of temperature in the S=1/2 Heisenberg antiferromagnetic ladder Cu2(C5H12N2)2Cl4. The presence of a spin...