Abstract
We use scanning tunneling spectroscopy to investigate the filled and empty electronic states of superconducting single-unit-cell FeSe deposited on SrTiO3(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.
Original language | English (US) |
---|---|
Article number | 017002 |
Journal | Physical review letters |
Volume | 115 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2 2015 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy