Superconductivity of quench-condensed beryllium and beryllium-germanium films

Autor: S. Ewert, H. Wühl, Albert Comberg
Rok vydání: 1975
Předmět:
Zdroj: Zeitschrift f�r Physik B: Condensed Matter and Quanta. 20:165-168
ISSN: 1434-6036
0340-224X
DOI: 10.1007/bf01315686
Popis: Tunneling experiments on Be films condensed onto helium cooled substrates show that these films are homogeneously disordered with a uniform transition temperatureTc when Ge is codeposited, whereas thick films of pure Be do not grow homogeneously. For films of Be+10 at.% Ge a ratio 2Δ/kBTc=3.7 is found. Phonon induced structure in the tunneling density of states is not observed. The metastable phase obtained by quench-condensation is considered to be a disordered high-temperature phase of Be which transforms to the room temperature phase at about 60 K.
Databáze: OpenAIRE
Popis
Abstrakt:Tunneling experiments on Be films condensed onto helium cooled substrates show that these films are homogeneously disordered with a uniform transition temperatureTc when Ge is codeposited, whereas thick films of pure Be do not grow homogeneously. For films of Be+10 at.% Ge a ratio 2Δ/kBTc=3.7 is found. Phonon induced structure in the tunneling density of states is not observed. The metastable phase obtained by quench-condensation is considered to be a disordered high-temperature phase of Be which transforms to the room temperature phase at about 60 K.
ISSN:14346036
0340224X
DOI:10.1007/bf01315686