Superconductivity in boron-doped crystalline and amorphous carbon
ORAL
Abstract
We investigate the superconducting properties of boron-doped carbon materials composed of sp3 hybridized atoms: cubic diamond, hexagonal diamond, and body centered tetragonal C4 (bct C4). We find that a high density of states (DOS) at the Fermi energy result in a high superconducting transition temperature (Tc) in all three materials. The high DOS is particularly realized when boron dopants are not placed at nearest neighbor sites. A Tc above 60 K can be obtained for cubic diamond, although other crystalline allotropes can exhibit a Tc of 40-50 K at 25 % boron-doping. We also consider superconductivity in boron-doped amorphous carbon.
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Presenters
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Yuki Sakai
University of Texas at Austin, University of Texas, Austin
Authors
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Yuki Sakai
University of Texas at Austin, University of Texas, Austin
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James Chelikowsky
The University of Texas at Austin, University of Texas at Austin, University of Texas, Austin
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Marvin L Cohen
University of California, Berkeley