Enhanced electron-phonon scattering in Janus MoSSe

Electron-phonon (e-ph) interaction in monolayer Janus MoSSe has been investigated using ab initio approach. We find that the asymmetric structure induced net dipole moment in MoSSe introduce an enhanced e-ph interaction compared to the symmetric MoS2. Through the mode resolved scattering analysis, w...

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Veröffentlicht in:New journal of physics 2019-11, Vol.21 (11), p.113040
Hauptverfasser: Guo, Rong, Bu, Xiangtian, Wang, Shudong, Zhao, Guojun
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Sprache:eng
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Zusammenfassung:Electron-phonon (e-ph) interaction in monolayer Janus MoSSe has been investigated using ab initio approach. We find that the asymmetric structure induced net dipole moment in MoSSe introduce an enhanced e-ph interaction compared to the symmetric MoS2. Through the mode resolved scattering analysis, we demonstrate that the out-of-plane optical mode in MoSSe contributing to the total e-ph scattering rates are much more than MoS2. Around the band edges, the maximum mean free paths (MFPs) of both electrons and holes along zigzag (ZZ) direction are found to be 4 nm in MoSSe, while the MFPs along armchair directions are significantly shorter than along ZZ direction, meaning the highly anisotropic transport properties in MoSSe.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/ab54a6