Superconductivity of bilayer phosphorene under interlayer compression |
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Affiliation: | 1. Department of Physics, Nanjing Normal University, Nanjing 210023, China;
2. National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, China |
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Abstract: | According to first-principles calculations, it is our prediction that bilayer phosphorene (BLP) will become a quasi-two-dimensional superconductor under a certain degree of interlayer compression. A decreasing interlayer distance may realize the transition in the BLP from a semiconducting phase to a metallic phase. On the other hand, a severe vertical compression may make the BLP lattice become dynamically unstable. It is found that in the stable metallic phase of the BLP, interlayer phonon modes dominate the electron-phonon coupling λ. The obtained λ can be greater than 1 and the superconducting temperature Tc can be higher than 10 K. |
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Keywords: | bilayer phosphorene superconductivity electron-phonon coupling semiconductor-metal transition |
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