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Giant anharmonicity and nonlinear electron-phonon coupling in MgB2: a combined first-principles calculation and neutron scattering study.

Abstract:

First-principles calculations of the electronic band structure and lattice dynamics for the new superconductor MgB (2) are carried out and found to be in excellent agreement with our inelastic neutron scattering measurements. The numerical results reveal that the E(2g) in-plane boron phonons near the zone center are very anharmonic and strongly coupled to the planar B sigma bands near the Fermi level. This giant anharmonicity and nonlinear electron-phonon coupling is key to quantitatively exp...

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Publication status:
Published

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Journal:
Physical review letters
Volume:
87
Issue:
3
Pages:
037001
Publication date:
2001-07-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:a924ef53-d3bb-492b-a09e-9a9783867f4d
Source identifiers:
50464
Local pid:
pubs:50464
Language:
English
Keywords:

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