Bounds on nanoscale nematicity in single-layer FeSe/SrTiO3

Dennis Huang, Tatiana A. Webb, Shiang Fang, Can Li Song, Cui Zu Chang, Jagadeesh S. Moodera, Efthimios Kaxiras, Jennifer E. Hoffman

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11 Scopus citations

Abstract

We use scanning tunneling microscopy (STM) and quasiparticle interference (QPI) imaging to investigate the low-energy orbital texture of single-layer FeSe/SrTiO3. We develop a T-matrix model of multiorbital QPI to disentangle scattering intensities from Fe 3dxz and 3dyz bands, enabling the use of STM as a nanoscale detection tool of nematicity. By sampling multiple spatial regions of a single-layer FeSe/SrTiO3 film, we quantitatively exclude static xz/yz orbital ordering with domain size larger than δr2=20nm×20nm, xz/yz Fermi wave vector difference larger than δk=0.014π, and energy splitting larger than δE=3.5meV. The lack of detectable ordering pinned around defects places qualitative constraints on models of fluctuating nematicity.

Original languageEnglish (US)
Article number125129
JournalPhysical Review B
Volume93
Issue number12
DOIs
StatePublished - Mar 18 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Huang, D., Webb, T. A., Fang, S., Song, C. L., Chang, C. Z., Moodera, J. S., Kaxiras, E., & Hoffman, J. E. (2016). Bounds on nanoscale nematicity in single-layer FeSe/SrTiO3. Physical Review B, 93(12), [125129]. https://doi.org/10.1103/PhysRevB.93.125129