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  • Nocerino, ElisabettaKTH,Material- och nanofysik,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology (author)

Multiple unconventional charge density wave transitions in LaPt2Si2 superconductor clarified with high-energy X-ray diffraction

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • Springer Nature,2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:15b5fc6f-2534-47bd-a7b3-9cd706df52f2
  • https://research.chalmers.se/publication/537930URI
  • https://doi.org/10.1038/s43246-023-00406-yDOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-338787URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • QC 20231101
  • The quasi-2D platinum-based rare earth intermetallic LaPt2Si2 has attracted attention as it exhibits strong interplay between charge density wave order and superconductivity. However, most of the results reported on this material come from theoretical calculations, preliminary bulk investigations and powder samples, which makes it difficult to uniquely determine the temperature evolution of its crystal structure and, consequently, of its charge density wave transition. Therefore, the published literature around LaPt2Si2 is often controversial. Here, by means of high-resolution synchrotron X-ray diffraction data, we clarify some of the poorly or partially understood aspects of the physics of LaPt2Si2. In particular, we resolve the complex evolution of its crystal structure and superstructures, identifying the temperature dependence of multiple density wave transitions in good quality LaPt2Si2 single crystals. According to our findings, on cooling from room temperature LaPt2Si2 undergoes a series of subtle structural transitions which can be summarised as follows: second order commensurate tetragonal (P4/n m m)-to-incommensurate structure followed by a first order incommensurate-to-commensurate orthorhombic (P m m n) transition and then a first order commensurate orthorhombic (P m m n)-to-commensurate tetragonal (P4/n m m). The structural transitions are accompanied by both incommensurate and commensurate superstructural distortions of the lattice. The observed behavior is compatible with discommensuration of the CDW in this material.

Subject headings and genre

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  • Sanlorenzo, IreneNiels Bohr Institute,Politecnico di Torino,Polytechnic University of Turin,Nanoscience Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark, Universitetsparken 5; Department of Applied Science and Technology, Politecnico di Torino, corso Duca degli abruzzi 24, 10129, Torino, Italy, corso Duca degli abruzzi 24 (author)
  • Papadopoulos, Konstantinos,1989Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden(Swepub:cth)konpap (author)
  • Medarde, MarisaPaul Scherrer Institut,Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland (author)
  • Lyu, JikePaul Scherrer Institut,Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland (author)
  • Klein, Yannick MaximilianPaul Scherrer Institut,Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland (author)
  • Minelli, A.University Of Oxford,Inorganic Chemistry Laboratory, University of Oxford, Oxford, OX1 3QR, UK (author)
  • Hossain, ZakirIndian Institute of Technology,Department of Physics, Indian Institute of Technology, Kanpur, Uttar Pradesh, 208016, India, Uttar Pradesh (author)
  • Thamizhavel, A.Tata Institute of Fundamental Research,DCMPMS, Tata Institute of Fundamental Research, Mumbai, Maharashtra, 400005, India, Maharashtra (author)
  • Lefmann, K.Niels Bohr Institute,Nanoscience Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark, Universitetsparken 5 (author)
  • Ivashko, O.Deutsches Elektronen-Synchrotron (DESY),Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany, Notkestr. 85 (author)
  • von Zimmermann, MartinDeutsches Elektronen-Synchrotron (DESY),Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany, Notkestr. 85 (author)
  • Sassa, Yasmine,1981Chalmers tekniska högskola,Chalmers University of Technology,Department of Physics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden(Swepub:cth)sassa (author)
  • Månsson, Martin,As. Prof.1976-KTH,Material- och nanofysik,Alba Nova Universitetscentrum,AlbaNova University Center. Stockholm Center for Physics, Astronomy and Biotechnology(Swepub:kth)u1sajjx0 (author)
  • KTHMaterial- och nanofysik (creator_code:org_t)

Related titles

  • In:Communications Materials: Springer Nature4:12662-4443

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