Hierarchy of Lifshitz transitions in the surface electronic structure of Sr2RuO4 under uniaxial compression

DOI: 10.1103/PhysRevLett.130.096401

Authors: Edgar Abarca Morales (Max Planck Institute for Chemical Physics of Solids; University of St. Andrews) , Gesa-R. Siemann (University of St Andrews) , Andela Zivanovic (Max Planck Institute for Chemical Physics of Solids; University of St Andrews) , Philip A. E. Murgatroyd (University of St Andrews) , Igor Markovic (Max Planck Institute for Chemical Physics of Solids; University of St. Andrews) , Brendan Edwards (University of St Andrews) , Chris A. Hooley (University of St Andrews) , Dmitry A. Sokolov (Max Planck Institute for Chemical Physics of Solids) , Naoki Kikugawa (National Institute for Materials Science (Japan)) , Cephise Cacho (Diamond Light Source) , Matthew D. Watson (Diamond Light Source) , Timur K. Kim (Diamond Light Source) , Clifford W. Hicks (Max Planck Institute for Chemical Physics of Solids; University of Birmingham) , Andrew P. Mackenzie (Max Planck Institute for Chemical Physics of Solids; University of St. Andrews) , Phil D. C. King (University of St Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 130

State: Published (Approved)
Published: February 2023
Diamond Proposal Number(s): 27471 , 28412

Abstract: We report the evolution of the electronic structure at the surface of the layered perovskite Sr 2 RuO 4 under large in-plane uniaxial compression, leading to anisotropic B 1 g strains of ϵ x x − ϵ y y = − 0.9 ± 0.1 % . From angle-resolved photoemission, we show how this drives a sequence of Lifshitz transitions, reshaping the low-energy electronic structure and the rich spectrum of van Hove singularities that the surface layer of Sr 2 RuO 4 hosts. From comparison to tight-binding modeling, we find that the strain is accommodated predominantly by bond-length changes rather than modifications of octahedral tilt and rotation angles. Our study sheds new light on the nature of structural distortions at oxide surfaces, and how targeted control of these can be used to tune density of state singularities to the Fermi level, in turn paving the way to the possible realization of rich collective states at the Sr 2 RuO 4 surface.

Journal Keywords: Electronic structure; Strain; Superconductors; Surface reconstruction; Surface states; Angle-resolved photoemission spectroscopy; Tight-binding model

Subject Areas: Materials, Physics


Instruments: I05-ARPES

Added On: 02/03/2023 10:04

Discipline Tags:

Surfaces Superconductors Quantum Materials Hard condensed matter - electronic properties Physics Hard condensed matter - structures Materials Science

Technical Tags:

Spectroscopy Angle Resolved Photoemission Spectroscopy (ARPES)