From a Lifshitz Transition to Spin-Density-Wave Order: Sr2RuO4 under Uniaxial Strain
Abstract
In recent years, the effects of uniaxial strain on Sr2RuO4 have been extensively investigated, revealing a pronounced enhancement of the superconducting critical temperature accompanied by experimental indications of an emergent magnetically ordered state. In this Letter, we study the impact of strain on the spectral and magnetic properties of this material within an advanced many-body theoretical framework. We find that strain induces an anisotropic Lifshitz transition, which enhances the electron scattering rate along the elongation axis while simultaneously promoting coherent Fermi-liquid behavior in the perpendicular direction, in close agreement with experimental observations. Taking into account this anisotropic behavior allows us to capture the magnetic instability leading to a finite-temperature ordered state at large strain values. Our analysis further reveals that the magnetic response is dominated by two competing wave vectors associated with distinct nesting vectors: one within the γ sheet and the other between the α and β sheets of the Fermi surface. Both wave vectors can stabilize magnetic order, with their competition depending sensitively on the coherence of the respective Fermi surface sheets.
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BibTeX
@misc{stepanov2026from,
title = {{From a Lifshitz Transition to Spin-Density-Wave Order: Sr$_2$RuO$_4$ under Uniaxial Strain}},
author = {Evgeny A. Stepanov and Sophie Beck and Maria Chatzieleftheriou and Antoine Georges},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38025},
eprint = {2610.38025},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38025},
}
RIS
TY - UNPB
TI - From a Lifshitz Transition to Spin-Density-Wave Order: Sr_2RuO_4 under Uniaxial Strain
AU - Evgeny A. Stepanov
AU - Sophie Beck
AU - Maria Chatzieleftheriou
AU - Antoine Georges
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.38025
UR - https://arxiv.org/abs/2610.38025
AB - In recent years, the effects of uniaxial strain on Sr_2RuO_4 have been extensively investigated, revealing a pronounced enhancement of the superconducting critical temperature accompanied by experimental indications of an emergent magnetically ordered state. In this Letter, we study the impact of strain on the spectral and magnetic properties of this material within an advanced many-body theoretical framework. We find that strain induces an anisotropic Lifshitz transition, which enhances the electron scattering rate along the elongation axis while simultaneously promoting coherent Fermi-liquid behavior in the perpendicular direction, in close agreement with experimental observations. Taking into account this anisotropic behavior allows us to capture the magnetic instability leading to a finite-temperature ordered state at large strain values. Our analysis further reveals that the magnetic response is dominated by two competing wave vectors associated with distinct nesting vectors: one within the γ sheet and the other between the α and β sheets of the Fermi surface. Both wave vectors can stabilize magnetic order, with their competition depending sensitively on the coherence of the respective Fermi surface sheets.
ER -