PRL_Multicritical_FS_cond_mat.pdf (6.67 MB)
Multicritical Fermi Surface Topological Transitions
journal contribution
posted on 2019-10-21, 11:26 authored by Dmitry Efremov, Alex Shtyk, Andreas W Rost, Claudio Chamon, Andrew P Mackenzie, Joseph BetourasJoseph BetourasA 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.
Funding
EPSRC grant No. EP/P002811/1 and Royal Society (JJB) and DOE Grant No. DE-FG02-06ER46316 (CC)
History
School
- Science
Department
- Physics
Published in
Physical Review LettersVolume
123Issue
20Publisher
American Physical SocietyVersion
- AM (Accepted Manuscript)
Rights holder
© American Physical SocietyPublisher statement
This paper was accepted for publication in the journal Physical Review Letters and the definitive published version is available at https://doi.org/10.1103/PhysRevLett.123.207202.Acceptance date
2019-10-11Publication date
2019-11-13Copyright date
2019ISSN
0031-9007eISSN
1079-7114Publisher version
Language
- en
Depositor
Dr Joseph Betouras. Deposit date: 18 October 2019Article number
207202Usage metrics
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