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PH427 Journal Club Presentation Matt W. Graham March 1, 2016

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

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  1. PH427 Journal Club Presentation Matt W. Graham March 1, 2016

  2. 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).

  3. How do electrons relax in graphene? Acoustic phonons or optical phonons? < 4 meV Electron and acoustic phonon velocity mismatch slows cooling1-2 200 meV

  4. 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

  5. Supercollision acoustic phonon relaxation qac vs kBTe qdisorder Fast kBTe

  6. 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

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