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Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
Published on: February 5, 2019
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Superconducting Phases in Lithium Decorated Graphene LiC
Rouhollah Gholami1, Rostam Moradian2,3, Sina Moradian4
1Physics Department, Faculty of Science Razi University, Kermanshah, Iran.
Scientific Reports
|September 16, 2018
Summary
Lithium-decorated graphene exhibits novel superconducting phases due to broken lattice symmetry. These phases, including distorted s-wave pairing, arise from specific electronic structures and hybridization effects.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Chemistry
Background:
- Graphene's superconducting properties are of significant interest.
- Understanding the influence of decoration and symmetry breaking on superconductivity is crucial.
Purpose of the Study:
- To investigate possible superconducting phases in Li-decorated graphene.
- To model the effects of Li decoration on graphene's electronic structure and superconducting gap symmetries.
Main Methods:
- A realistic tight-binding model, fitted to ab initio calculations.
- Analysis of seven hybridized Li-C orbitals and nine bond pairing amplitudes.
- Solving the gap equation for various gap symmetries.
Main Results:
- Identified specific pairing symmetries (e.g., s and dxy) arising from Li decoration.
- Observed a new extended s-wave pairing favored by a nearly degenerate band.
- Discovered a phase transition to a distorted s-wave at a critical electron doping level.
Conclusions:
- Li decoration breaks graphene's lattice symmetry, leading to unique superconducting phases.
- The distorted s-wave and extended s-wave pairings are consequences of Li decoration.
- These findings offer insights into controlling superconductivity in 2D materials.
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