Bounds on nanoscale nematicity in single-layer FeSe/SrTiO[subscript 3]
Author(s)
Huang, Dennis; Webb, Tatiana A.; Fang, Shiang; Song, Can-Li; Kaxiras, Efthimios; Hoffman, Jennifer E.; Chang, Cui-zu; Moodera, Jagadeesh; ... Show more Show less
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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.
Date issued
2016-03Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Plasma Science and Fusion Center; Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)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
ISSN
2469-9950
2469-9969