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Scripts, Tutorials and Applications / How to calculate valley resolved transmission in graphene
« on: March 14, 2016, 09:32 »
1) In graphene, application of strain must cause a gauge potential that has opposite sign for K and K' valleys. Therefore, in the case of strained region on graphene, valleys must deflect to transverse directions. This also reduces the conductance at some energy levels. Is there a way to calculate the transmission of K and K' independently?
2) In the VNL buildder, I am using ''stretch the cell'' to apply uniaxial strain. In that case, does the calculation consider a gauge potential that affects kx and ky in the Hamiltonian. For example, if the strain is uniaxial along transport direction of armchair graphene, this only generate a gauge potential on ky. So electrons must deflect (similar with application of magnetic field). Due to some reflection, conductance must decrease. Is the system considering this approach?
Example works:
Applied Physics Letters 97,043508 (2010)
Applied Physics Express 8,105201 (2015)
AIP Advances 6, 056303 (2016)
2) In the VNL buildder, I am using ''stretch the cell'' to apply uniaxial strain. In that case, does the calculation consider a gauge potential that affects kx and ky in the Hamiltonian. For example, if the strain is uniaxial along transport direction of armchair graphene, this only generate a gauge potential on ky. So electrons must deflect (similar with application of magnetic field). Due to some reflection, conductance must decrease. Is the system considering this approach?
Example works:
Applied Physics Letters 97,043508 (2010)
Applied Physics Express 8,105201 (2015)
AIP Advances 6, 056303 (2016)