Spectroscopic evidence of low-energy gaps persisting up to 120 K in surface-doped p -terphenyl crystals
Year: 2019
Type: article
Abstract: Using high-resolution photoemission spectroscopy on in situ potassium surface-doped para-terphenyl crystals, we uncover a low-energy spectral gap of 12 meV. This spectral gap displays a strong temperature-dependent gap-filling behavior and persists up to 120 K, which is consistent with the onset temperature of a weak steplike diamagnetic transition found in this material. Among a few potential candidates for the origin of the observed gaps, we argue that electron pairing is a plausible origin---a possibility consistent with fluctuating Cooper pairs forming near 120 K.
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: DYNAMICS OF ELECTRONIC INTERACTIONS IN SUPERCONDUCTORS AND RELATED MATERIALS, G1286236842, G1286251239, G222768804, G303061748, G30714459, G3083819904, NEW TECHNIQUES FOR ELECTRONIC STRUCTURE OF CORRELATED ELECTRON SYSTEMS, G419881185, G42916606, G4501827968, G498139845, G5648016710, G650090426, G969889393
OpenAlex ID: W2967093360