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  • PhysRevLett.112.055504

    Rights statement: © 2014 American Physical Society

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Electron-phonon coupling and the metallization of solid helium at terapascal pressures

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Electron-phonon coupling and the metallization of solid helium at terapascal pressures. / Monserrat, Bartomeu; Drummond, Neil; Pickard, Chris J. et al.
In: Physical review letters, Vol. 112, No. 5, 055504, 07.02.2014.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Monserrat, B, Drummond, N, Pickard, CJ & Needs, RJ 2014, 'Electron-phonon coupling and the metallization of solid helium at terapascal pressures', Physical review letters, vol. 112, no. 5, 055504. https://doi.org/10.1103/PhysRevLett.112.055504

APA

Monserrat, B., Drummond, N., Pickard, C. J., & Needs, R. J. (2014). Electron-phonon coupling and the metallization of solid helium at terapascal pressures. Physical review letters, 112(5), Article 055504. https://doi.org/10.1103/PhysRevLett.112.055504

Vancouver

Monserrat B, Drummond N, Pickard CJ, Needs RJ. Electron-phonon coupling and the metallization of solid helium at terapascal pressures. Physical review letters. 2014 Feb 7;112(5):055504. doi: 10.1103/PhysRevLett.112.055504

Author

Monserrat, Bartomeu ; Drummond, Neil ; Pickard, Chris J. et al. / Electron-phonon coupling and the metallization of solid helium at terapascal pressures. In: Physical review letters. 2014 ; Vol. 112, No. 5.

Bibtex

@article{15a620dce8cf40cd94e9c2ee69060318,
title = "Electron-phonon coupling and the metallization of solid helium at terapascal pressures",
abstract = "Solid He is studied in the pressure and temperature ranges 1-40 TPa and 0-10 000 K using first-principles methods. Anharmonic vibrational properties are calculated within a self-consistent field framework, including the internal and free energies, density-pressure relation, stress tensor, thermal expansion, and the electron-phonon coupling renormalization of the electronic band gap. We find that an accurate description of electron-phonon coupling requires us to use a nonperturbative approach. The metallization pressure of 32.9 TPa at 0 K is larger than found previously. The vibrational effects are large; for example, at P=30  TPa the band gap is increased by 2.8 eV by electron-phonon coupling and a further 0.1 eV by thermal expansion compared to the static value. The implications of the calculated metallization pressure for the cooling of white dwarfs are discussed.",
author = "Bartomeu Monserrat and Neil Drummond and Pickard, {Chris J.} and Needs, {R. J.}",
note = "{\textcopyright} 2014 American Physical Society",
year = "2014",
month = feb,
day = "7",
doi = "10.1103/PhysRevLett.112.055504",
language = "English",
volume = "112",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "5",

}

RIS

TY - JOUR

T1 - Electron-phonon coupling and the metallization of solid helium at terapascal pressures

AU - Monserrat, Bartomeu

AU - Drummond, Neil

AU - Pickard, Chris J.

AU - Needs, R. J.

N1 - © 2014 American Physical Society

PY - 2014/2/7

Y1 - 2014/2/7

N2 - Solid He is studied in the pressure and temperature ranges 1-40 TPa and 0-10 000 K using first-principles methods. Anharmonic vibrational properties are calculated within a self-consistent field framework, including the internal and free energies, density-pressure relation, stress tensor, thermal expansion, and the electron-phonon coupling renormalization of the electronic band gap. We find that an accurate description of electron-phonon coupling requires us to use a nonperturbative approach. The metallization pressure of 32.9 TPa at 0 K is larger than found previously. The vibrational effects are large; for example, at P=30  TPa the band gap is increased by 2.8 eV by electron-phonon coupling and a further 0.1 eV by thermal expansion compared to the static value. The implications of the calculated metallization pressure for the cooling of white dwarfs are discussed.

AB - Solid He is studied in the pressure and temperature ranges 1-40 TPa and 0-10 000 K using first-principles methods. Anharmonic vibrational properties are calculated within a self-consistent field framework, including the internal and free energies, density-pressure relation, stress tensor, thermal expansion, and the electron-phonon coupling renormalization of the electronic band gap. We find that an accurate description of electron-phonon coupling requires us to use a nonperturbative approach. The metallization pressure of 32.9 TPa at 0 K is larger than found previously. The vibrational effects are large; for example, at P=30  TPa the band gap is increased by 2.8 eV by electron-phonon coupling and a further 0.1 eV by thermal expansion compared to the static value. The implications of the calculated metallization pressure for the cooling of white dwarfs are discussed.

U2 - 10.1103/PhysRevLett.112.055504

DO - 10.1103/PhysRevLett.112.055504

M3 - Journal article

VL - 112

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

IS - 5

M1 - 055504

ER -