Interplay of screening and superconductivity in low-dimensional materials
Abstract
A quantitative description of Coulomb interactions is developed for two-dimensional superconducting materials, enabling us to compare intrinsic with external screening effects, such as those due to substrates. Therefore, using the example of a doped monolayer of MoS2 embedded in a tunable dielectric environment, we demonstrate that the influence of external screening is limited to a length scale, bounded from below by the effective thickness of the quasi-two-dimensional material and from above by its intrinsic screening length. As a consequence, it is found that unconventional Coulomb-driven superconductivity cannot be induced in MoS2 by tuning the substrate properties alone. Our calculations of the retarded Morel-Anderson Coulomb potential μ* reveal that the Coulomb interactions, renormalized by the reduced layer thickness and the substrate properties, can shift the onset of the electron-phonon driven superconducting phase in monolayer MoS2 but do not significantly affect the critical temperature at optimal doping.
- Authors:
-
- Univ. of Bremen (Germany). Inst. fuer Theoretische Physik; Univ. of Bremen (Germany). Bremen Center for Computational Materials Science
- Univ. of Southern California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Southern California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1535772
- Alternate Identifier(s):
- OSTI ID: 1328518
- Grant/Contract Number:
- FG02-05ER46240
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 13; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electron-phonon coupling; electronic structure; superconductivity; transition temperature; 2-dimensional systems; doped semiconductors; heterostructures; transition-metal dichalcogenide; density functional calculations; Eliashberg theory; GW method; methods in superconductivity
Citation Formats
Schönhoff, G., Rösner, M., Groenewald, R. E., Haas, S., and Wehling, T. O. Interplay of screening and superconductivity in low-dimensional materials. United States: N. p., 2016.
Web. doi:10.1103/physrevb.94.134504.
Schönhoff, G., Rösner, M., Groenewald, R. E., Haas, S., & Wehling, T. O. Interplay of screening and superconductivity in low-dimensional materials. United States. https://doi.org/10.1103/physrevb.94.134504
Schönhoff, G., Rösner, M., Groenewald, R. E., Haas, S., and Wehling, T. O. Wed .
"Interplay of screening and superconductivity in low-dimensional materials". United States. https://doi.org/10.1103/physrevb.94.134504. https://www.osti.gov/servlets/purl/1535772.
@article{osti_1535772,
title = {Interplay of screening and superconductivity in low-dimensional materials},
author = {Schönhoff, G. and Rösner, M. and Groenewald, R. E. and Haas, S. and Wehling, T. O.},
abstractNote = {A quantitative description of Coulomb interactions is developed for two-dimensional superconducting materials, enabling us to compare intrinsic with external screening effects, such as those due to substrates. Therefore, using the example of a doped monolayer of MoS2 embedded in a tunable dielectric environment, we demonstrate that the influence of external screening is limited to a length scale, bounded from below by the effective thickness of the quasi-two-dimensional material and from above by its intrinsic screening length. As a consequence, it is found that unconventional Coulomb-driven superconductivity cannot be induced in MoS2 by tuning the substrate properties alone. Our calculations of the retarded Morel-Anderson Coulomb potential μ* reveal that the Coulomb interactions, renormalized by the reduced layer thickness and the substrate properties, can shift the onset of the electron-phonon driven superconducting phase in monolayer MoS2 but do not significantly affect the critical temperature at optimal doping.},
doi = {10.1103/physrevb.94.134504},
journal = {Physical Review. B},
number = 13,
volume = 94,
place = {United States},
year = {Wed Oct 05 00:00:00 EDT 2016},
month = {Wed Oct 05 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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