Nonadiabatic superconductivity in a Li-intercalated hexagonal boron nitride bilayer
Copyright © 2020, Szewczyk et al.; licensee Beilstein-Institut..
When considering a Li-intercalated hexagonal boron nitride bilayer (Li-hBN), the vertex corrections of electron-phonon interaction cannot be omitted. This is evidenced by the very high value of the ratio λωD/εF ≈ 0.46, where λ is the electron-phonon coupling constant, ωD is the Debye frequency, and εF represents the Fermi energy. Due to nonadiabatic effects, the phonon-induced superconducting state in Li-hBN is characterized by much lower values of the critical temperature (T LOVC C ∈ {19.1, 15.5, 11.8} K, for μ* ∈ {0.1, 0.14, 0.2}, respectively) than would result from calculations not taking this effect into account (T ME C∈ {31.9, 26.9, 21} K). From the technological point of view, the low value of T C limits the possible applications of Li-hBN. The calculations were carried out under the classic Migdal-Eliashberg formalism (ME) and the Eliashberg theory with lowest-order vertex corrections (LOVC). We show that the vertex corrections of higher order (λ3) lower the value of T LOVC C by a few percent.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:11 |
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| Enthalten in: |
Beilstein journal of nanotechnology - 11(2020) vom: 16., Seite 1178-1189 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Szewczyk, Kamila A [VerfasserIn] |
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| Links: |
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| Themen: |
Critical temperature |
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| Anmerkungen: |
Date Revised 29.03.2024 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.3762/bjnano.11.102 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM313953708 |
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| 245 | 1 | 0 | |a Nonadiabatic superconductivity in a Li-intercalated hexagonal boron nitride bilayer |
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| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2020, Szewczyk et al.; licensee Beilstein-Institut. | ||
| 520 | |a When considering a Li-intercalated hexagonal boron nitride bilayer (Li-hBN), the vertex corrections of electron-phonon interaction cannot be omitted. This is evidenced by the very high value of the ratio λωD/εF ≈ 0.46, where λ is the electron-phonon coupling constant, ωD is the Debye frequency, and εF represents the Fermi energy. Due to nonadiabatic effects, the phonon-induced superconducting state in Li-hBN is characterized by much lower values of the critical temperature (T LOVC C ∈ {19.1, 15.5, 11.8} K, for μ* ∈ {0.1, 0.14, 0.2}, respectively) than would result from calculations not taking this effect into account (T ME C∈ {31.9, 26.9, 21} K). From the technological point of view, the low value of T C limits the possible applications of Li-hBN. The calculations were carried out under the classic Migdal-Eliashberg formalism (ME) and the Eliashberg theory with lowest-order vertex corrections (LOVC). We show that the vertex corrections of higher order (λ3) lower the value of T LOVC C by a few percent | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Li-hBN bilayer | |
| 650 | 4 | |a Li-intercalated hexagonal boron nitride (Li-hBN) | |
| 650 | 4 | |a critical temperature | |
| 650 | 4 | |a electron–phonon interaction | |
| 650 | 4 | |a nonadiabatic superconductivity | |
| 650 | 4 | |a vertex corrections | |
| 700 | 1 | |a Domagalska, Izabela A |e verfasserin |4 aut | |
| 700 | 1 | |a Durajski, Artur P |e verfasserin |4 aut | |
| 700 | 1 | |a Szczęśniak, Radosław |e verfasserin |4 aut | |
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| 856 | 4 | 0 | |u http://dx.doi.org/10.3762/bjnano.11.102 |3 Volltext |
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