La2Sb, a layered superconductor with metal-metal bonds
Hiroshi Mizoguchi, Hideo Hosono
TL;DR
This paper reports the discovery of La2Sb, a layered superconductor with a critical temperature of 5.3 K, emphasizing the role of La-La metal bonds in its superconductivity.
Contribution
It introduces La2Sb as a new layered superconductor with a unique structure featuring metal-metal bonds, highlighting the importance of square nets in superconductivity.
Findings
La2Sb exhibits bulk superconductivity at 5.3 K.
The structure includes La square nets with strong La-La bonds.
Metal-metal bonding in the square nets is crucial for superconductivity.
Abstract
We found La2Sb with a layered structure composed of alternate stacking of La square nets and LaSb layers exhibits bulk superconductivity with a critical temperature of 5.3 K. This suggests that the presence of the square net with strong La-La metal bonding is essential for the emergence of superconductivity.
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