Spin excitations in the heavily overdoped monolayer graphene superconductor: An analog to the cuprates
| Autor: | Tao Zhou, W. LiMing, Wei-Jie Lin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Van Hove singularity
FOS: Physical sciences 02 engineering and technology 01 natural sciences law.invention Superconductivity (cond-mat.supr-con) Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons symbols.namesake law Condensed Matter::Superconductivity 0103 physical sciences Cuprate 010306 general physics Spin-½ Superconductivity Physics Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Graphene Condensed Matter - Superconductivity Fermi level Fermi surface 021001 nanoscience & nanotechnology symbols Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Random phase approximation |
| Zdroj: | Physical Review B. 103 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Recently it was reported experimentally that the monolayer graphene can be doped to beyond the Van Hove singularity. We study theoretically the possible superconductivity and the corresponding spin excitations of the monolayer graphene in this doping region. A static spin-density-wave state is favorable due to the nested Fermi surface as the Fermi level is doped to the Van Hove singularity point. Superconductivity may be realized upon further doping. The spin excitations in the superconducting state are studied theoretically based on the random phase approximation. The overall features are qualitatively the same with those in cuprate superconductors. Thus we have proposed an exciting possibility, namely, the heavily overdoped monolayer graphene can become a novel platform to study the unconventional superconductivity. 6 pages, 4 figures |
| Databáze: | OpenAIRE |
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