Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO[subscript 3]
Name
PhysRevLett.115.017002.pdf
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1.12 MB
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Author(s)
Huang, Dennis
Song, Can-Li
Webb, Tatiana A.
Fang, Shiang
Kaxiras, Efthimios
Hoffman, Jennifer E.
Chang, Cui-zu
Moodera, Jagadeesh
Date Issued
July 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Huang, Dennis, Can-Li Song, Tatiana A. Webb, Shiang Fang, Cui-Zu Chang, Jagadeesh S. Moodera, Efthimios Kaxiras, and Jennifer E. Hoffman. "Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO[subscript 3]." Phys. Rev. Lett. 115, 017002 (July 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We use scanning tunneling spectroscopy to investigate the filled and empty electronic states of superconducting single-unit-cell FeSe deposited on SrTiO[subscript 3](001). We map the momentum-space band structure by combining quasiparticle interference imaging with decay length spectroscopy. In addition to quantifying the filled-state bands, we discover a Γ-centered electron pocket 75 meV above the Fermi energy. Our density functional theory calculations show the orbital nature of empty states at Γ and explain how the Se height is a key tuning parameter of their energies, with broad implications for electronic properties.
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/PhysRevLett.115.017002
