Superconductivity in Bismuth. A New Look at an Old Problem.
To investigate the relationship between atomic topology, vibrational and electronic properties and superconductivity of bismuth, a 216-atom amorphous structure (a-Bi216) was computer-generated using our undermelt-quench approach. Its pair distribution function compares well with experiment. The calc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2016-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4729681?pdf=render |
| _version_ | 1811207003124531200 |
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| author | Zaahel Mata-Pinzón Ariel A Valladares Renela M Valladares Alexander Valladares |
| author_facet | Zaahel Mata-Pinzón Ariel A Valladares Renela M Valladares Alexander Valladares |
| author_sort | Zaahel Mata-Pinzón |
| collection | DOAJ |
| description | To investigate the relationship between atomic topology, vibrational and electronic properties and superconductivity of bismuth, a 216-atom amorphous structure (a-Bi216) was computer-generated using our undermelt-quench approach. Its pair distribution function compares well with experiment. The calculated electronic and vibrational densities of states (eDOS and vDOS, respectively) show that the amorphous eDOS is about 4 times the crystalline at the Fermi energy, whereas for the vDOS the energy range of the amorphous is roughly the same as the crystalline but the shapes are quite different. A simple BCS estimate of the possible crystalline superconducting transition temperature gives an upper limit of 1.3 mK. The e-ph coupling is more preponderant in a-Bi than in crystalline bismuth (x-Bi) as indicated by the λ obtained via McMillan's formula, λc = 0.24 and experiment λa = 2.46. Therefore with respect to x-Bi, superconductivity in a-Bi is enhanced by the higher values of λ and of eDOS at the Fermi energy. |
| first_indexed | 2024-04-12T03:57:39Z |
| format | Article |
| id | doaj.art-d0c4e34c10df48a9bd942c8d60fe0b27 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-12T03:57:39Z |
| publishDate | 2016-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-d0c4e34c10df48a9bd942c8d60fe0b272022-12-22T03:48:48ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01111e014764510.1371/journal.pone.0147645Superconductivity in Bismuth. A New Look at an Old Problem.Zaahel Mata-PinzónAriel A ValladaresRenela M ValladaresAlexander ValladaresTo investigate the relationship between atomic topology, vibrational and electronic properties and superconductivity of bismuth, a 216-atom amorphous structure (a-Bi216) was computer-generated using our undermelt-quench approach. Its pair distribution function compares well with experiment. The calculated electronic and vibrational densities of states (eDOS and vDOS, respectively) show that the amorphous eDOS is about 4 times the crystalline at the Fermi energy, whereas for the vDOS the energy range of the amorphous is roughly the same as the crystalline but the shapes are quite different. A simple BCS estimate of the possible crystalline superconducting transition temperature gives an upper limit of 1.3 mK. The e-ph coupling is more preponderant in a-Bi than in crystalline bismuth (x-Bi) as indicated by the λ obtained via McMillan's formula, λc = 0.24 and experiment λa = 2.46. Therefore with respect to x-Bi, superconductivity in a-Bi is enhanced by the higher values of λ and of eDOS at the Fermi energy.http://europepmc.org/articles/PMC4729681?pdf=render |
| spellingShingle | Zaahel Mata-Pinzón Ariel A Valladares Renela M Valladares Alexander Valladares Superconductivity in Bismuth. A New Look at an Old Problem. PLoS ONE |
| title | Superconductivity in Bismuth. A New Look at an Old Problem. |
| title_full | Superconductivity in Bismuth. A New Look at an Old Problem. |
| title_fullStr | Superconductivity in Bismuth. A New Look at an Old Problem. |
| title_full_unstemmed | Superconductivity in Bismuth. A New Look at an Old Problem. |
| title_short | Superconductivity in Bismuth. A New Look at an Old Problem. |
| title_sort | superconductivity in bismuth a new look at an old problem |
| url | http://europepmc.org/articles/PMC4729681?pdf=render |
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