%0 Conference Paper
%F Oral 
%T Unraveling the bandgap nature in hexagonal boron nitride
%+ Laboratoire Charles Coulomb (L2C)
%A Cassabois, Guillaume
%F Invité
%< sans comité de lecture
%Z L2C:16-018
%B UK Nitrides Consortium winter conference
%C Cambridge, United Kingdom
%8 2016-01-06
%D 2016
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Conference papers
%X I will discuss our recent experiments by two-photon spectroscopy demonstrating that hBN is an indirect bandgap material. I will show that the optical properties of hBN are profoundly determined by phonon-assisted transitions involving either virtual or real excitonic states. I will present our measurements of the exciton binding energy by two-photon excitation, leading to the estimation of 6.08 eV for the single-particle bandgap in hBN.
%G English
%L hal-01281937
%U https://hal.science/hal-01281937
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021