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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)