Superconductivity study of GaN highly doped by transition metals

Jacek Gosk , M. Boćkowski , M. Tokarczyk , G. Kowalski , A. Twardowski


GaN:Cr and GaN:Fe single crystals as well as GaN:Mn micropowders highly doped by transition metals were grown to investigate low temperature superconductivity. Magnetic measurements revealed type I superconductivity with TC 6 K and HC 600 Oe, identical for all compounds and also identical to that observed before in GaP:Cr and GaAs:Cr. The presence of amorphous inclusions of gallium may explain existing superconductivity as a result of a phase transition leading to β-Ga during cooling down of the sample. Since the observed parameters are close to those characteristic for superconducting Ga(II) this possibility could not be ruled out.
Author Jacek Gosk (FP / SRD) - [University of Warsaw (UW)]
Jacek Gosk,,
- Structural Research Division
- Uniwersytet Warszawski
, M. Boćkowski
M. Boćkowski,,
, M. Tokarczyk
M. Tokarczyk,,
, G. Kowalski
G. Kowalski,,
, A. Twardowski
A. Twardowski,,
Journal seriesActa Physica Polonica A, ISSN 0587-4246
Issue year2013
Keywords in EnglishAmorphous inclusions; GaAs; Low-temperature superconductivity; Micropowders, Gallium nitride; Transition metals, Superconductivity
ASJC Classification3100 General Physics and Astronomy
Score (nominal)15
Score sourcejournalList
ScoreMinisterial score = 15.0, 10-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 0.564; WoS Impact Factor: 2013 = 0.604 (2) - 2013=0.511 (5)
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