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  Light-Induced Renormalization of the Dirac Quasiparticles in the Nodal-Line Semimetal ZrSiSe

Gatti, G., Crepaldi, A., Puppin, M., Tancogne-Dejean, N., Xian, L. D., de Giovannini, U., et al. (2020). Light-Induced Renormalization of the Dirac Quasiparticles in the Nodal-Line Semimetal ZrSiSe. Physical Review Letters, 125(7): 076401. doi:10.1103/PhysRevLett.125.076401.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-DAC0-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-DAC1-A
Genre: Journal Article

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PhysRevLett.125.076401.pdf (Publisher version), 2MB
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The supplemental material contains 5 figures and a movie (.mov) | The supplemental material contains additional experimental and theoretical results about the renormalization of the Dirac quasiparticles dispersion. | It contains additional data for different absorbed fluences, and the analysis of the electronic temperature thermalization for two fluences. It discusses the apparent deviation from the linear dispersion close to EF due to the Fermi-Dirac distribution. A movie shows the ultrafast evolution of the surface band structure along the MXM direction, as discussed in Figure 2 and 3. | Finally, we provide more details about the theoretical calculations, comparing the results of different method (DFT, DFT + U, HSE and DFT +U+V). Additional time-dependent DFT simulations benchmark our interpretation by investigating the energy position of the bands upon optical excitation.
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https://arxiv.org/abs/1912.09673 (Preprint)
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 Creators:
Gatti, G.1, 2, Author
Crepaldi, A.1, 2, Author
Puppin, M.2, 3, Author
Tancogne-Dejean, N.4, 5, Author              
Xian, L. D.4, 5, Author              
de Giovannini, U.4, 5, Author              
Roth, S.1, 2, Author
Polishchuk, S.2, 3, Author
Bugnon, Ph.1, Author
Magrez, A.1, Author
Berger, H.1, Author
Frassetto, F.6, Author
Poletto, L.6, Author
Moreschini, L.7, 8, Author
Moser, S.7, 9, Author
Bostwick, A.7, Author
Rotenberg, Eli7, Author
Rubio, A.4, 5, 10, 11, Author              
Chergui, M.2, 3, Author
Grioni, M.1, 2, Author
Affiliations:
1Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), ou_persistent22              
2Lausanne Centre for Ultrafast Science (LACUS), Ecole Polytechnique Fédérale de Lausanne (EPFL), ou_persistent22              
3Laboratory of Ultrafast Spectroscopy, ISIC, Ecole Polytechnique Fédérale de Lausanne (EPFL), ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
5Center for Free-Electron Laser Science, ou_persistent22              
6National Research Council-Institute for Photonics and Nanotechnologies (CNR-IFN), ou_persistent22              
7Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, ou_persistent22              
8Department of Physics, University of California–Berkeley, Berkeley, ou_persistent22              
9Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, ou_persistent22              
10Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del País Vasco, ou_persistent22              
11Center for Computational Quantum Physics, Flatiron Institute, New York, ou_persistent22              

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 Abstract: In nodal-line semimetals, linearly dispersing states form Dirac loops in the reciprocal space with a high degree of electron-hole symmetry and a reduced density of states near the Fermi level. The result is reduced electronic screening and enhanced correlations between Dirac quasiparticles. Here we investigate the electronic structure of ZrSiSe, by combining time- and angle-resolved photoelectron spectroscopy with ab initio density functional theory (DFT) complemented by an extended Hubbard model (DFT+U+V) and by time-dependent DFT+U+V. We show that electronic correlations are reduced on an ultrashort timescale by optical excitation of high-energy electrons-hole pairs, which transiently screen the Coulomb interaction. Our findings demonstrate an all-optical method for engineering the band structure of a quantum material.

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Language(s): eng - English
 Dates: 2019-12-132020-07-172020-08-122020-08-14
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.125.076401
arXiv: 1912.09673
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 (7) Sequence Number: 076401 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1