Implications of the electron-phonon coupling in CuPb 9 ( PO 4 ) 6 O for superconductivity: An ab initio study
- Univ. of Iowa, Iowa City, IA (United States); Ames Lab., and Iowa State Univ., Ames, IA (United States)
- Univ. of Iowa, Iowa City, IA (United States); Eindhoven Univ. of Technology (Netherlands)
- Ames Lab., and Iowa State Univ., Ames, IA (United States)
Here we report ab initio calculations of the electronic and vibrational properties in CuPb9 (PO4)6O, including the electron-phonon coupling strength via strong-coupling Migdal-Eliashberg theory. We verify the presence of appealing flat electronic bands near the Fermi level, a strong hybridization between the Cu 3d and O 2p states, and soft low-energy phonons, which can suggest high-temperature superconducting behavior. However, the electron-phonon coupling strength appears insufficient to overcome the Coulomb repulsion between an electron pair and thus does not support high-temperature superconductivity in CuPb9 (PO4)6O via the conventional electron-phonon Migdal-Eliashberg mechanism. Even neglecting Coulomb repulsion of the electron pair we find this electron-phonon coupling suggests a superconducting transition temperature of less than 2 K.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE
- Grant/Contract Number:
- SC0016379; AC02-07CH11358
- OSTI ID:
- 2282322
- Alternate ID(s):
- OSTI ID: 2474230
- Report Number(s):
- IS-J-11,241; TRN: US2408642
- Journal Information:
- Physical Review Materials, Vol. 8, Issue 1; ISSN 2475-9953
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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