Bounds on nanoscale nematicity in single-layer FeSe/SrTiO[subscript 3]
Name
PhysRevB.93.125129.pdf
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2.44 MB
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Author(s)
Huang, Dennis
Webb, Tatiana A.
Fang, Shiang
Song, Can-Li
Kaxiras, Efthimios
Hoffman, Jennifer E.
Chang, Cui-zu
Moodera, Jagadeesh
Date Issued
March 2016
Journal
Physical Review B
Publisher
American Physical Society
Citation
Huang, Dennis, Tatiana A. Webb, Shiang Fang, Can-Li Song, Cui-Zu Chang, Jagadeesh S. Moodera, Efthimios Kaxiras, and Jennifer E. Hoffman. “ Bounds on Nanoscale Nematicity in Single-Layer FeSe/SrTiO[subscript 3.” Physical Review B 93, no. 12 (March 18, 2016). © 2016 American Physical Society
Version
Final published version
Abstract
We use scanning tunneling microscopy (STM) and quasiparticle interference (QPI) imaging to investigate the low-energy orbital texture of single-layer FeSe/SrTiO[subscript 3]. We develop a T-matrix model of multiorbital QPI to disentangle scattering intensities from Fe 3d[subscript xz] and 3d[subscript yz] bands, enabling the use of STM as a nanoscale detection tool of nematicity. By sampling multiple spatial regions of a single-layer FeSe/SrTiO[subscript 3] film, we quantitatively exclude static xz/yz orbital ordering with domain size larger than δr[superscript 2] = 20 nm × 20 nm, xz/yz Fermi wave vector difference larger than δk = 0.014 π, and energy splitting larger than δE = 3.5 meV. The lack of detectable ordering pinned around defects places qualitative constraints on models of fluctuating nematicity.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.93.125129
