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

Journal Article · · Physical Review Letters
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  1. Ecole Polytechnique Federale Lausanne (Switzerland)
  2. Max Planck Institute for the Structure and Dynamics of Matter. (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science
  3. National Research Council-Institute for Photonics and Nanotechnologies (CNR-IFN), Padova (Italy)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of California, Berkeley, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Univ. of Wurzburg (Germany)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  7. Max Planck Institute for the Structure and Dynamics of Matter. (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Center for Free-Electron Laser Science; Universidad del País Vasco, San Sebastian (Spain); Flatiron Institute, New York, NY (United States)
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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. In this study 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.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss National Science Foundation (SNSF); European Research Council (ERC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1775402
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 125; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS2 journal December 2020
Photoinduced renormalization of Dirac states in BaNiS$_2$ text January 2019
NMR determination of Van Hove singularity and Lifshitz transitions in nodal-line semimetal ZrSiTe text January 2021

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
electronic structure
light-matter interaction
node-line semimetals
time & angle resolved photoemission spectroscopy
topological materials