First-principles study on superconductivity of the gold–indium alloy under high pressure

Autor:	Masaya Nomura, Kuniko Kato, Hiroyoshi Itoh, Takahiro Ishikawa, Naoshi Suzuki, Katsuya Shimizu
Rok vydání:	2013
Předmět:	Superconductivity Materials science Condensed matter physics Phonon Alloy chemistry.chemical_element engineering.material Condensed Matter Physics chemistry engineering Coupling (piping) Atomic ratio Density functional theory Indium Ambient pressure
Zdroj:	High Pressure Research. 33:152-157
ISSN:	1477-2299 0895-7959
Popis:	The superconductivity of gold–indium alloys has been investigated using first-principles calculations based on the density functional theory. At ambient pressure, the calculated superconducting transition temperature (T c) is 0.04 μ K in pure gold, but T c dramatically increases by substituting indium atoms for gold atoms. The gold–indium alloy having 12.5 atomic percent indium (Au0.875In0.125) shows T c of 0.1 K, and Au0.75In0.25 marks 1.7 K. The dramatic increase in T c owing to the alloying effect is caused by the enhancement of the electron–phonon coupling. The superconductivity of gold is predicted to be drastically weakened with increasing pressure and virtually disappear at 10 GPa, but it continues up to at least 30 GPa by the inclusion of indium atoms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::585590363b27d3930cb7af6c562fb5db https://doi.org/10.1080/08957959.2012.763120 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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