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  Multicritical Fermi Surface Topological Transitions

Efremov, D. V., Shtyk, A., Rost, A. W., Chamon, C., Mackenzie, A. P., & Betouras, J. J. (2019). Multicritical Fermi Surface Topological Transitions. Physical Review Letters, 123(20): 207202, pp. 1-6. doi:10.1103/PhysRevLett.123.207202.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-4D85-F Version Permalink: http://hdl.handle.net/21.11116/0000-0005-51D6-E
Genre: Journal Article

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 Creators:
Efremov, Dmitry V.1, Author
Shtyk, Alex1, Author
Rost, Andreas W.1, Author
Chamon, Claudio1, Author
Mackenzie, Andrew P.2, Author              
Betouras, Joseph J.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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 Abstract: A wide variety of complex phases in quantum materials are driven by electron-electron interactions, which are enhanced through density of states peaks. A well-known example occurs at van Hove singularities where the Fermi surface undergoes a topological transition. Here we show that higher order singularities, where multiple disconnected leaves of Fermi surface touch all at once, naturally occur at points of high symmetry in the Brillouin zone. Such multicritical singularities can lead to stronger divergences in the density of states than canonical van Hove singularities, and critically boost the formation of complex quantum phases via interactions. As a concrete example of the power of these Fermi surface topological transitions, we demonstrate how they can be used in the analysis of experimental data on Sr3Ru2O7. Understanding the related mechanisms opens up new avenues in material design of complex quantum phases.

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Language(s): eng - English
 Dates: 2019-11-132019-11-13
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
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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: 123 (20) Sequence Number: 207202 Start / End Page: 1 - 6 Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1