Multicritical Fermi Surface Topological Transitions
Journal Article
·
· Physical Review Letters
- Loughborough Univ. (United Kingdom); OSTI
- Harvard Univ., Cambridge, MA (United States)
- Univ. of St. Andrews, Scotland (United Kingdom); Max Planck Institute for Solid State Research, Stuttgart (Germany)
- Boston Univ., MA (United States)
- Univ. of St. Andrews, Scotland (United Kingdom); Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
- Loughborough Univ. (United Kingdom)
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. Further, 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.
- Research Organization:
- Boston Univ., MA (United States)
- Sponsoring Organization:
- Engineering and Physical Sciences Research Council (EPSRC); Royal Society; USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-06ER46316
- OSTI ID:
- 1800382
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 123; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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