Publications (11)
Electron-induced nuclear magnetic ordering in n-type semiconductors
M. Vladimirova, D. Scalbert, M. S. Kuznetsova +1
Nuclear magnetism in n-doped semiconductors with positive hyperfine constant is revisited. Two kinds of nuclear magnetic ordering can be induced by resident electrons in a deeply c…
Nonlinear optical spectroscopy of indirect excitons in biased coupled quantum wells
P. Andreakou, S. Cronenberger, D. Scalbert +9
Indirect excitons in coupled quantum wells are long-living quasi-particles, explored in the studies of collective quantum states. We demonstrate, that despite the extremely low osc…
Single-shot measurement of transient nuclear magnetization with spin-noise spectroscopy in n-GaAs microcavities
I. I. Ryzhov, S. V. Poltavtsev, K. V. Kavokin +9
We exploit spin noise spectroscopy (SNS) to directly observe build-up of dynamic nuclear polarization and relaxation of a perturbed nuclear spin-system to its equilibrium state in…
Influence of magnetic quantum confined Stark effect on the spin lifetime of indirect excitons
P. Andreakou, A. V. Mikhailov, S. Cronenberger +7
We report on the unusual and counter-intuitive behaviour of spin lifetime of excitons in coupled semiconductor quantum wells (CQWs) in the presence of in-plane magnetic field. Inst…
Complexity of dipolar exciton Mott transition in GaN/(AlGa)N nanostructures
F. Chiaruttini, T. Guillet, C. Brimont +6
The Mott transition from a dipolar excitonic liquid to an electron-hole plasma is demonstrated in a wide GaN/(Al,Ga)N quantum well at K by means of spatially-resolved magneto-…
Two kinds of spin precession modes in diluted magnetic semiconductors
M. Vladimirova, S. Cronenberger, P. Barate +3
Time-resolved Kerr rotation experiments show that two kinds of spin modes exist in diluted magnetic semiconductors: (i) coupled electron-magnetic ion spin excitations and (ii) exci…
Nuclear spin relaxation in n-GaAs: from insulating to metallic regime
M. Vladimirova, S. Cronenberger, D. Scalbert +7
Nuclear spin relaxation is studied in n-GaAs thick layers and microcavity samples with different electron densities. We reveal that both in metallic samples where electrons are fre…
Spin temperature concept verified by optical magnetometry of nuclear spins
M. Vladimirova, S. Cronenberger, D. Scalbert +5
We develop a method of non-perturbative optical control over adiabatic remagnetisation of the nuclear spin system and apply it to verify the spin temperature concept in GaAs microc…
Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures
M. Vladimirova, S. Cronenberger, A. Colombier +4
Heat capacity of the nuclear spin system (NSS) in GaAs-based microstructures has been shown to be much greater than expected from dipolar coupling between nuclei, thus limiting the…
Exciton dynamics in CdTe/CdZnTe quantum well
A. V. Mikhailov, A. S. Kurdyubov, E. S. Khramtsov +6
Exciton energy structure and population dynamics in a wide CdTe/CdZnTe quantum well are studied by spectrally-resolved pump-probe spectroscopy. Multiple excitonic resonances in ref…
Spin noise of localized electrons in CdTe/CdMgTe quantum well
A. L. Zibinskiy, S. Cronenberger, B. Gribakin +5
The spin dynamics of localized electrons in bulk semiconductors is governed by the interplay of effective nuclear field fluctuations, spin exchange between electrons, and spin tran…