PT Journal
AU Omidian, M
   Brand, J
   Néel, N
   Crampin, S
   Kröger, J
TI From a wide band gap to the superconducting proximity effect: Fe on Pb(111)
SO New journal of physics: the open-access journal for physics
PD April
PY 2023
VL 25
IS 3
PU Dt. Physikalische Ges.
DI 10.1088/1367-2630/acc607
WP https://www.db-thueringen.de/receive/dbt_mods_00062509
LA en
DE electronic structure; scanning tunneling microscopy; scanning tunneling spectroscopy; superconductivity; Physik; Zeitschrift; Online-Publikation
SN 1367-2630
AB Epitaxially grown Fe nanostructures on Pb(111) were studied by low-temperature scanning tunneling microscopy and spectroscopy. The deposited Fe assemblies are classified into two groups according to their electronic behavior close to the Fermi energy. One group exhibits a wide energy gap of 0.7 eV that is independent of the temperature ranging from 5 K to room temperature. These Fe islands indicate the absence of the superconductivity proximity effect in their interior. The other group shows a metallic behavior at the Fermi level. The substrate superconducting phase locally enters into these islands, which is evidenced by a sharp resonance at the Fermi energy presumably signaling Andreev reflection at the magnet-superconductor interface.
PI Bad Honnef
ER