Revealing the Empty-State Electronic Structure of Single-Unit-Cell FeSe/SrTiO[subscript 3]
DownloadPhysRevLett.115.017002.pdf (1.116Mb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
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.
Date issued
2015-07Department
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 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
ISSN
0031-9007
1079-7114