TY  - JOUR
AU  - Mitrano, M.
AU  - Cotugno, G.
AU  - Clark, S. R.
AU  - Singla, R.
AU  - Kaiser, S.
AU  - Stähler, J.
AU  - Beyer, R.
AU  - Dressel, M.
AU  - Baldassarre, L.
AU  - Nicoletti, D.
AU  - Perucchi, A.
AU  - Hasegawa, T.
AU  - Okamoto, H.
AU  - Jaksch, D.
AU  - Cavalleri, A.
TI  - Pressure-Dependent Relaxation in the Photoexcited Mott Insulator ET–F<sub>2</sub>TCNQ: Influence of Hopping and Correlations on Quasiparticle Recombination Rates
JO  - Physical review letters
VL  - 112
IS  - 11
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2016-03175
SP  - 117801
PY  - 2014
AB  - We measure the ultrafast recombination of photoexcited quasiparticles (holon-doublon pairs) in the one dimensional Mott insulator ET–F<sub>2</sub>TCNQ as a function of external pressure, which is used to tune the electronic structure. At each pressure value, we first fit the static optical properties and extract the electronic bandwidth t and the intersite correlation energy V. We then measure the recombination times as a function of pressure, and we correlate them with the corresponding microscopic parameters. We find that the recombination times scale differently than for metals and semiconductors. A fit to our data based on the time-dependent extended Hubbard Hamiltonian suggests that the competition between local recombination and delocalization of the Mott-Hubbard exciton dictates the efficiency of the recombination.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000332925900038
C6  - pmid:24702420
DO  - DOI:10.1103/PhysRevLett.112.117801
UR  - https://bib-pubdb1.desy.de/record/307321
ER  -