Pressure-induced Superconductivity in Crystalline Boron Nanowires

Details Pressure-induced Superconductivity in Crystalline Boron Nanowires Pressure-induced Superconductivity in Crystalline Boron Nanowires

2009-04-08

arxiv.org/abs/0904.1278v1

Phys. Rev. B (R), 79,140505 (2009)

Physics

Condensed Matter

Superconductivity

17 pages, 5 figures

Scientific paper

We report high-pressure induced superconductivity in boron nanowires (BNWs) with rhombohedral crystal structure. Obviously different from bulk rhombohedral boron, these BNWs show a semiconductor-metal transition at much lower pressure than bulk boron. Also, we found these BNWs become superconductors with Tc=1.5 K at 84 GPa, at the pressure of which bulk boron is still a semiconductor, via in-situ resistance measurements in a diamond anvil cell. With increasing pressure, Tc of the BNWs increases. The occurrence of superconductivity in the BNWs at a pressure as low as 84 GPa probably arises from the size effect.

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