Can Two-Dimensional Boron Superconduct?

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• 作者：Evgeni S. Penev ; Alex Kutana ; Boris I. Yakobson
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：April 13, 2016
• 年：2016
• 卷：16
• 期：4
• 页码：2522-2526
• 全文大小：506K
• 年卷期：0
• ISSN：1530-6992

文摘

Two-dimensional boron is expected to exhibit various structural polymorphs, all being metallic. Additionally, its small atomic mass suggests strong electron–phonon coupling, which in turn can enable superconducting behavior. Here we perform first-principles analysis of electronic structure, phonon spectra, and electron–phonon coupling of selected 2D boron polymorphs and show that the most stable structures predicted to feasibly form on a metal substrate should also exhibit intrinsic phonon-mediated superconductivity, with estimated critical temperature in the range of T_c ≈ 10–20 K.