Van Hove singularity and stress-induced Fermi surface tuning in Sr<sub>2</sub>RuO<sub>4</sub>
ORAL
Abstract
Application of in-plane uniaxial stress to the quasi-2D correlated material Sr2RuO4 results in pronounced changes to the physical properties; most widely recognized is a factor 2.5 increase in superconducting transition temperature. The normal state is also significantly impacted. Reported here are 17O NMR hyperfine shifts over a wide range of stress, field, and temperature. Results are compared to renormalized 3-band Wannier models constructed from DFT calculations. The crossover temperature to standard Fermi Liquid properties is observed to be tuned continuously from TFL=30 K to 0 K with applied stress. Furthermore, the combination of correlations and the stress-controlled proximity of EF to a van Hove singularity are the main factors in determining the normal state properties for temperatures of order 300 K and below.
*Julian Schwinger Foundation Alexander von Humboldt Foundation National Science Foundation (1709304, 2004553) Laboratory Directed Research and Development programme of Los Alamos National Laboratory (20170204ER)
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Presenters
Aaron Chronister
University of California, Los Angeles
Authors
Aaron Chronister
University of California, Los Angeles
Manuel Zingl
Center For Computational Quantum Physics, Flatiron Institute
Flatiron Institute
Andrej Pustogow
University of California, Los Angeles
Department of Physics and Astronomy, University of California
University of Stuttgart
Yongkang Luo
University of California, Los Angeles
Huazhong University of Science & Technology
Huazhong University of Science and Technology
Yue-Shun Su
University of California, Los Angeles
Andrew Mackenzie
Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
Max Planck Institute for Chemical Physics of Solids
Max Planck Institute for the Chemical Physics of Solids
Clifford W Hicks
Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
Max Planck Institute for Chemical Physics of Solids
Chemical Physics of Solids, Max Planck Institute
Max Planck Institute for the Chemical Physics of Solids
Eric D Bauer
Los Alamos National Laboratory
Los Alamos National Lab
Los Alamos National laboratory
Los Alamos Natl Lab
Condensed Matter and Magnet Science Group, Los Alamos National Laboratory
Los Alamos National LAborator
Naoki Kikugawa
National Institute for Materials Science, Tsukuba, Japan
National Institute for Material Science, Tsukuba Japan
National Institute for Materials Science
National Institute for Material Science, Japan
Jernej Mravlje
Jozef Stefan Institute, Ljubljana, Slovenia
Institute Jozef Stefan
Antoine Georges
Center for Computational Quantum Physics, Flatiron Institute
