Dumbbells of five-connected silicon atoms and superconductivity in the binary silicides MSi3 (M = Ca, Y, Lu).
J Am Chem Soc
; 134(33): 13558-61, 2012 Aug 22.
Article
em En
| MEDLINE
| ID: mdl-22845167
ABSTRACT
The new metastable binary silicides MSi(3) (M = Ca, Y, Lu) have been synthesized by high-pressure, high-temperature reactions at pressures between 12(2) and 15(2) GPa and temperatures from 900(100) to 1400(150) K. The atomic patterns comprise intricate silicon layers of condensed molecule-like Si(2) dimers. The alkaline-earth element adopts the oxidation state +2, while the rare-earth and transition metals realize +3. All of the compounds exhibit BCS-type superconductivity with weak electron-phonon coupling below critical temperatures of up to 7 K.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
J Am Chem Soc
Ano de publicação:
2012
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Article