0000000000740744

AUTHOR

Jean-marc Broto

showing 2 related works from this author

Electronic structure of indium selenide probed by magnetoabsorption spectroscopy under high pressure

2010

We report on an investigation of the peculiar electronic structure of the layered semiconductor InSe by magneto-optical experiments under high pressure up to 5 GPa. Magneto-absorption spectroscopy is performed under pulsed magnetic field up to 53 T using a specific setup. Excitonic magnetofingerprints and high-field oscillatory magnetoabsorption yield significant details on the band structure. In addition, the application of an external pressure unveils phenomena that confirm the specific $\mathbf{k}\ensuremath{\cdot}\mathbf{p}$ model proposed for this compound on the basis of earlier measurements.

Yield (engineering)Materials scienceCondensed matter physicsbusiness.industrychemistry.chemical_element02 engineering and technologyElectronic structure021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsMagnetic field[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]chemistry.chemical_compoundSemiconductorchemistrySelenide0103 physical sciences010306 general physics0210 nano-technologySpectroscopyElectronic band structurebusinessComputingMilieux_MISCELLANEOUSIndium
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High pressure and high magnetic field behaviour of free and donor-bound-exciton photoluminescence in InSe

2009

We report here first magneto-photoluminescence investigations under high pressure up to 6 GPa on III-VI layered semiconductor InSe. Both diamagnetism and magnetic field induced gap opening driven by Landau quantization became observable by using a 60 T pulsed magnet. The pressure-induced enhancement of the diamagnetic coefficient is consistent with the increase of the dielectric constant under pressure while the evolution of the linear coefficient is consistent with a slight increase of the electron effective mass up to 4 GPa and a direct-to-indirect conduction-band crossover around that pressure.

PhotoluminescenceCondensed matter physicsChemistryBand gapExcitonDielectricLandau quantizationCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter::Materials ScienceEffective mass (solid-state physics)Diamagnetismphysica status solidi (b)
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