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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: https://hdl.handle.net/21.11116/0000-0006-DAC0-B Version Permalink: https://hdl.handle.net/21.11116/0000-000B-BBAA-3
Genre: Journal Article

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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://dx.doi.org/10.1103/PhysRevLett.125.076401 (Publisher version)
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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: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.125.076401
arXiv: 1912.09673
 Degree: -

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Project name : -
Grant ID : 695197
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : We acknowledge financial support by the Swiss National Science Foundation (SNSF), via the NCCR:MUST and the Contracts No. 206021-157773 and No. 407040-154056 (PNR 70). This work was supported by the ERC Advanced Grant No. H2020, ERCEA Grant No. 695197, DYNAMOX Grant No. ERC-2015-AdG694097, the Cluster of Excellence (AIM), Grupos Consolidados (Grant No. IT1249-19), and SFB925. The Flatiron Institute is a division of the Simons Foundation. S. M. acknowledges support by the Swiss National Science Foundation (Grant No. P300P2-171221). This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under Contract No. DE-AC02-05CH11231.
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Source 1

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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