Can Two-Dimensional Boron Superconduct?
Can Two-Dimensional Boron Superconduct?
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DOI：
10.1021/acs.nanolett.6b00070
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发表时间：
2016-04-01
期刊：
影响因子：
10.8
通讯作者：
Yakobson, Boris I.
中科院分区：
文献类型：
--
作者：
Penev, Evgeni S.;Kutana, Alex;Yakobson, Boris I.
二维硼有望表现出各种结构多态，都是金属的。此外，它的小原子质量意味着强烈的电子-声子耦合，这反过来又可以使超导行为成为可能。在这里，我们对选定的二维硼多晶型的电子结构、声子谱和电声子耦合进行了第一性原理分析，结果表明，预测在金属衬底上可行形成的最稳定的结构也应该表现出本征声子介导的超导电性，估计临界温度在T-c接近10-20K的范围内。
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 approximate to 10-20 K.