Pressure-induced Superconductivity in Crystalline Boron Nanowires

Abstract

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.

17 pages, 5 figures

References in corpus (3)

• Size dependence of the Tc and the superconducting energy gap in nanocrystalline thin films of Nb
• Shape resonances in the superconducting order parameter of ultrathin nanowires
• Pressure-induced metallization in solid boron

Cited by in corpus (5)

• Observation of superconductivity in pressurized Weyl semimetal candidate TaIrTe4
• Quasi-uniaxial pressure induced superconductivity in stoichiometric compound UTe${}_2$
• Debye temperature in LaHx-LaDy superconductors
• Advanced McMillan's equation and its application for the analysis of highly-compressed superconductors
• Classification of superconductors on Tc Map