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PH427 Journal Club Presentation Matt W. Graham March 1, 2016. Motivation. Fundamental Physics How do electrons in graphene loose their energy? Possible applications graphene bolometers and photosensors designing graphene electronics. E ( k ). T e. Graphene Photodetector. t.
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PH427 Journal Club Presentation Matt W. Graham March 1, 2016
Motivation Fundamental Physics • How do electrons in graphene loose their energy? Possible applications • graphene bolometers and photosensors • designing graphene electronics E(k) Te Graphene Photodetector t Th T. Mueller et al., Nature Photonics4, 297-301 (2010).
How do electrons relax in graphene? Acoustic phonons or optical phonons? < 4 meV Electron and acoustic phonon velocity mismatch slows cooling1-2 200 meV
Relationship with class material How do electrons relax in graphene? Acoustic phonons or optical phonons? < 4 meV Electron and acoustic phonon velocity mismatch slows cooling1-2 200 meV 200 meV
Supercollision acoustic phonon relaxation qac vs kBTe qdisorder Fast kBTe
Result From Paper: supercollison acoustic model predicts how electrons relax in graphene Conclusions: a new model and physical process of how electrons relax in graphene has been developed