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Title: Electronic Band Structure of a Superconducting Nickelate Probed by the Seebeck Coefficient in the Disordered Limit

Superconducting nickelates are a new family of strongly correlated electron materials with a phase diagram closely resembling that of superconducting cuprates. While analogy with the cuprates is natural, very little is known about the metallic state of the nickelates, making these comparisons difficult. We probe the electronic dispersion of thin-film superconducting five-layer (n=5) and metallic three-layer (n=3) nickelates by measuring the Seebeck coefficientS. We find a temperature-independent and negativeS/Tfor bothn=5andn=3nickelates. These results are in stark contrast to the strongly temperature-dependentS/Tmeasured at similar electron filling in the cuprateLa1.36Nd0.4Sr0.24CuO4. The electronic structure calculated from density-functional theory can reproduce the temperature dependence, sign, and amplitude ofS/Tin the nickelates using Boltzmann transport theory. This demonstrates that the electronic structure obtained from first-principles calculations provides a reliable description of the fermiology of superconducting nickelates and suggests that, despite indications of strong electronic correlations, there are well-defined quasiparticles in the metallic state. Finally, we explain the differences in the Seebeck coefficient between nickelates and cuprates as originating in strong dissimilarities in impurity concentrations. Our study demonstrates that the high elastic scattering limit of the Seebeck coefficient reflects only the underlying band structure of a metal, analogous to the high magnetic field limit of the Hall coefficient. This opens a new avenue for Seebeck measurements to probe the electronic band structures of relatively disordered quantum materials.

Published by the American Physical Society2024 
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Award ID(s):
2045826
PAR ID:
10562402
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ; ;
Publisher / Repository:
APS
Date Published:
Journal Name:
Physical Review X
Volume:
14
ISSN:
2160-3308
Page Range / eLocation ID:
041021
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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Retrieved from https://par.nsf.gov/biblio/10562402. <em>Physical Review X</em> 14. Web. doi:10.1103/PhysRevX.14.041021. </div> <div class="modal-footer"> <button class="btn btn-sm btn-default" data-dismiss="modal" aria-hidden="true">Close</button> </div> </div> </div> </div></li> <li class="links-format"><a href="#cite-apa" data-toggle="modal">APA</a> <div id="cite-apa" class="modal" tabindex="-1" role="dialog" aria-labelledby="cite-apa_label" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <strong id="cite-apa_label">Cite: APA Format</strong> </div> <div class="modal-body">Grissonnanche, G, Pan, G A, LaBollita, H, Segedin, D Ferenc, Song, Q, Paik, H, Brooks, C M, Beauchesne-Blanchet, E, Santana_González, J L, Botana, A S, Mundy, J A, & Ramshaw, B J. <em>Electronic Band Structure of a Superconducting Nickelate Probed by the Seebeck Coefficient in the Disordered Limit</em>. <em>Physical Review X</em>, <em>14</em> (). Retrieved from https://par.nsf.gov/biblio/10562402. <a href="https://doi.org/10.1103/PhysRevX.14.041021">https://doi.org/10.1103/PhysRevX.14.041021</a> </div> <div class="modal-footer"> <button class="btn btn-sm btn-default" data-dismiss="modal" aria-hidden="true">Close</button> </div> </div> </div> </div></li> <li class="links-format"><a href="#cite-chi" data-toggle="modal">Chicago</a> <div id="cite-chi" class="modal" tabindex="-1" role="dialog" aria-labelledby="cite-chi_label" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <strong id="cite-chi_label">Cite: Chicago Format</strong> </div> <div class="modal-body">Grissonnanche, G, Pan, G A, LaBollita, H, Segedin, D Ferenc, Song, Q, Paik, H, Brooks, C M, Beauchesne-Blanchet, E, Santana_González, J L, Botana, A S, Mundy, J A, and Ramshaw, B J. "Electronic Band Structure of a Superconducting Nickelate Probed by the Seebeck Coefficient in the Disordered Limit". <em>Physical Review X</em> 14 (). Country unknown/Code not available: APS. <a href="https://doi.org/10.1103/PhysRevX.14.041021">https://doi.org/10.1103/PhysRevX.14.041021.</a> <a href="https://par.nsf.gov/biblio/10562402">https://par.nsf.gov/biblio/10562402</a>. </div> <div class="modal-footer"> <button class="btn btn-sm btn-default" data-dismiss="modal" aria-hidden="true">Close</button> </div> </div> </div> </div></li> <li class="links-format"><a href="#cite-bib" data-toggle="modal">BibTeX</a> <div id="cite-bib" class="modal" tabindex="-1" role="dialog" aria-labelledby="cite-bib_label" aria-hidden="true"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button> <strong id="cite-bib_label">Cite: BibTeX Format</strong> </div> <div class="modal-body"> @article{osti_10562402,<br/> place = {Country unknown/Code not available}, title = {Electronic Band Structure of a Superconducting Nickelate Probed by the Seebeck Coefficient in the Disordered Limit}, url = {https://par.nsf.gov/biblio/10562402}, DOI = {10.1103/PhysRevX.14.041021}, abstractNote = {Superconducting nickelates are a new family of strongly correlated electron materials with a phase diagram closely resembling that of superconducting cuprates. While analogy with the cuprates is natural, very little is known about the metallic state of the nickelates, making these comparisons difficult. We probe the electronic dispersion of thin-film superconducting five-layer (n=5) and metallic three-layer (n=3) nickelates by measuring the Seebeck coefficientS. We find a temperature-independent and negativeS/Tfor bothn=5andn=3nickelates. These results are in stark contrast to the strongly temperature-dependentS/Tmeasured at similar electron filling in the cuprateLa1.36Nd0.4Sr0.24CuO4. The electronic structure calculated from density-functional theory can reproduce the temperature dependence, sign, and amplitude ofS/Tin the nickelates using Boltzmann transport theory. This demonstrates that the electronic structure obtained from first-principles calculations provides a reliable description of the fermiology of superconducting nickelates and suggests that, despite indications of strong electronic correlations, there are well-defined quasiparticles in the metallic state. Finally, we explain the differences in the Seebeck coefficient between nickelates and cuprates as originating in strong dissimilarities in impurity concentrations. Our study demonstrates that the high elastic scattering limit of the Seebeck coefficient reflects only the underlying band structure of a metal, analogous to the high magnetic field limit of the Hall coefficient. This opens a new avenue for Seebeck measurements to probe the electronic band structures of relatively disordered quantum materials. Published by the American Physical Society2024}, journal = {Physical Review X}, volume = {14}, publisher = {APS}, author = {Grissonnanche, G and Pan, G A and LaBollita, H and Segedin, D Ferenc and Song, Q and Paik, H and Brooks, C M and Beauchesne-Blanchet, E and Santana_González, J L and Botana, A S and Mundy, J A and Ramshaw, B J}, }</div> <div class="modal-footer"> <button class="btn btn-sm btn-default" data-dismiss="modal" aria-hidden="true">Close</button> </div> </div> </div> </div></li> <li class="divider"></li> </ul> <ul class="nav nav-list" style="font-size: 14px; font-family: Arial Regular;"> <li class="nav-header header-format">Export Metadata</li> <li class="links-format"><a href="https://par.nsf.gov/endnote?osti_id=10562402">EndNote</a></li> <li class="links-format"><a href="https://par.nsf.gov/export/format:excel/osti-id:10562402">Excel</a></li> <li class="links-format"><a href="https://par.nsf.gov/export/format:csv/osti-id:10562402">CSV</a></li> <li class="links-format"><a href="https://par.nsf.gov/export/format:xml/osti-id:10562402">XML</a></li> <li class="divider"></li> </ul> <ul class="nav nav-list" style="font-size: 14px; 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