Tunable delay time and Hartman effect in graphene magnetic barriers

Journal Article · Tue Apr 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4919069· OSTI ID:22402934

Ban, Yue; Wang, Lin-Jun ^[1]; Chen, Xi ^[2]

---

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444 (China)
2. Department of Physics, Shanghai University, Shanghai 200444 (China)

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.

• OSTI ID: 22402934
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
GRAPHENE
HARTMANN NUMBER
MAGNETIC FIELDS
MAGNETISM
TIME DELAY