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Title: Tunable delay time and Hartman effect in graphene magnetic barriers

Tunable group delay and Hartman effect have been investigated for massless Dirac electrons in graphene magnetic barriers. In the presence of magnetic field, dwell time is found to be equal to net group delay plus the group delay contributing from the lateral shifts. The group delay times are discussed in both cases of normal and oblique incidence, to clarify the nature of Hartman effect. In addition, the group delay in transmission can be modulated from subluminality to superluminality by adjusting the magnetic field, which may also lead to potential applications in graphene-based microelectronics.
Authors:
;  [1] ;  [2]
  1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444 (China)
  2. Department of Physics, Shanghai University, Shanghai 200444 (China)
Publication Date:
OSTI Identifier:
22402934
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRONS; GRAPHENE; HARTMANN NUMBER; MAGNETIC FIELDS; MAGNETISM; TIME DELAY