Superconductivity in two-dimensional boron allotropes
Yinchang Zhao, Shuming Zeng, Jun Ni
DOI 10.1103/PhysRevB.93.014502 · Physical Review B
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Abstract
We use ab initio evolutionary algorithm and first-principles calculations to investigate structural, electronic, vibrational, and superconducting properties of two-dimensional (2D) boron allotropes. Remarkably, we show that conventional BCS superconductivity in the stable 2D boron structures is ubiquitous with the critical temperature Tc above the liquid hydrogen temperature for certain configurations. Due to the electronic states of the Fermi surface originating from both σ and π electrons, the superconductivity of the 2D structures arises from multiple phonon modes. Our results support that 2D boron structure may be a pure single-element material with the highest Tc on conditions without high pressure and external strain.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39.9 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure unresolved | unknown |
| H3S Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 190 | 200 GPa | unknown |
| Be Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 10.5 | Pressure not reported | unknown |
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