Strongly bound excitons in anatase TiO2 single crystals and nanoparticles

E. Baldini; L. Chiodo; A. Dominguez; M. Palummo; S. Moser; M. Yazdi-Rizi; G. Auböck; B.P.P. Mallett; H. Berger; A. Magrez; C. Bernhard; M. Grioni; A. Rubio; M. Chergui

doi:10.1038/s41467-017-00016-6

Nature Communications (Apr 2017)

Strongly bound excitons in anatase TiO2 single crystals and nanoparticles

E. Baldini,
L. Chiodo,
A. Dominguez,
M. Palummo,
S. Moser,
M. Yazdi-Rizi,
G. Auböck,
B.P.P. Mallett,
H. Berger,
A. Magrez,
C. Bernhard,
M. Grioni,
A. Rubio,
M. Chergui

Affiliations

E. Baldini: Laboratory of Ultrafast Spectroscopy, ISIC and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL)
L. Chiodo: Unit of Nonlinear Physics and Mathematical Modelling, Department of Engineering, Università Campus Bio-Medico di Roma
A. Dominguez: Max Planck Institute for the Structure and Dynamics of Matter
M. Palummo: Dipartimento di Fisica and INFN, Università Tor Vergata
S. Moser: Laboratory of Electron Spectroscopy, IPHYS and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL)
M. Yazdi-Rizi: Department of Physics, University of Fribourg
G. Auböck: Laboratory of Ultrafast Spectroscopy, ISIC and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL)
B.P.P. Mallett: Department of Physics, University of Fribourg
H. Berger: Crystal Growth Facility, École Polytechnique Fédérale de Lausanne (EPFL)
A. Magrez: Crystal Growth Facility, École Polytechnique Fédérale de Lausanne (EPFL)
C. Bernhard: Department of Physics, University of Fribourg
M. Grioni: Laboratory of Electron Spectroscopy, IPHYS and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL)
A. Rubio: Max Planck Institute for the Structure and Dynamics of Matter
M. Chergui: Laboratory of Ultrafast Spectroscopy, ISIC and Lausanne Centre for Ultrafast Science (LACUS), École Polytechnique Fédérale de Lausanne (EPFL)

DOI: https://doi.org/10.1038/s41467-017-00016-6
Journal volume & issue: Vol. 8, no. 1
pp. 1 – 11

Abstract

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Here the authors combine steady-state angle-resolved photoemission spectroscopy, ellipsometry and ultrafast two-dimensional ultraviolet spectroscopy to examine the role of many-body correlations in anatase TiO2, revealing the existence of strongly bound excitons in single crystals and nanoparticles.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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