In:
Journal of Physics: Condensed Matter, IOP Publishing, Vol. 33, No. 15 ( 2021-04-14), p. 155501-
Abstract:
We report growth, electronic structure and superconductivity of ultrathin epitaxial CoSi 2 films on Si (111). At low coverages, preferred islands with 2, 5 and 6 monolayers height develop, which agrees well with the surface energy calculation. We observe clear quantum well states as a result of electronic confinement and their dispersion agrees well with density functional theory calculations, indicating weak correlation effect despite strong contributions from Co 3 d electrons. Ex situ transport measurements show that superconductivity persists down to at least 10 monolayers, with reduced T c but largely enhanced upper critical field. Our study opens up the opportunity to study the interplay between quantum confinement, interfacial symmetry breaking and superconductivity in an epitaxial silicide film, which is technologically relevant in microelectronics.
Type of Medium:
Online Resource
ISSN:
0953-8984
,
1361-648X
DOI:
10.1088/1361-648X/abdff6
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2021
detail.hit.zdb_id:
1472968-4
detail.hit.zdb_id:
228975-1
