Phonon-mediated superconductivity in borophenes

We use first-principles calculations to systematically investigate electronic, vibrational, and superconducting properties in borophenes (boron monolayer sheets). Remarkably, superconducting transition temperature Tc is a V-like function of hexagon hole density and has a similar tendency to the vari...

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Veröffentlicht in:	Applied physics letters 2016-06, Vol.108 (24)
Hauptverfasser:	Zhao, Yinchang, Zeng, Shuming, Ni, Jun
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied physics Boron Borophene Density of states Electrons Fermi level First principles Hole density Quantum theory Sheets Silver Substrates Superconductivity Transition temperature
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container_title	Applied physics letters
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creator	Zhao, Yinchang Zeng, Shuming Ni, Jun
description	We use first-principles calculations to systematically investigate electronic, vibrational, and superconducting properties in borophenes (boron monolayer sheets). Remarkably, superconducting transition temperature Tc is a V-like function of hexagon hole density and has a similar tendency to the variations of the total energy and density of states at the Fermi level, which shows that the larger density of states at the Fermi level corresponds to the higher Tc . In consideration of substrate, the Ag(111) surfaces weaken the superconductivity in borophenes, which results in T c μ * = 0.1 of about 5.2 K in the buckled triangular sheet. As synthesis of borophenes was reported, superconducting boron sheets are feasible.
doi_str_mv	10.1063/1.4953775
format	Article
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subjects	Applied physics Boron Borophene Density of states Electrons Fermi level First principles Hole density Quantum theory Sheets Silver Substrates Superconductivity Transition temperature
title	Phonon-mediated superconductivity in borophenes
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