Ballistic collective group delay and its Goos–Hänchen component in graphene

Yu Song, Han-Chun Wu
  • Journal of Physics Condensed Matter, August 2013, Institute of Physics Publishing
  • DOI: 10.1088/0953-8984/25/35/355301

Intrinsic contribution of Goos-Hanchen shift to 2D phase time (group delay) in graphene

What is it about?

The high-frequency response property is determined by the dwell time or phase time of tunneling electrons. It was widely believed that, the phase time reads d\phi/dE, where \phi is the scattering phase. In this work, we demonstrate that, for oblique incidence, the Goos-Hanchen shift contributes an intrinsic component in the phase time (or group delay), which resulting a remarkable asymmetric feature in the energy dependence of the 2D phase time.

Why is it important?

The phase time (group delay) in graphene will be illegally calculated without the intrinsic Goos-Hanchen component revealed by us.


Yu Song (Author)

I hope more researchers can notice the new and complete definition of 2D phase time or group delay, which exists in all 2D materials.

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