Wigner Transport Simulation of Resonant Tunneling Diodes with Auxiliary Quantum Wells

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Resonant-tunneling diodes (RTDs) with auxiliary quantum wells (e.g., emitter prewell, subwell, and collector postwell) are studied using a Wigner transport equation (WTE) discretized by a thirdorder upwind differential scheme. A flat-band potential profile is used for the WTE simulation. Our calculations revealed functions of the auxiliary wells as follows: The prewell increases the current density (J) and the peak voltage (V (p) ) while decreasing the peak-to-valley current ratio (PVCR), and the postwell decreases J while increasing the PVCR. The subwell affects J and PVCR, but its main effect is to decrease V (p) . When multiple auxiliary wells are used, each auxiliary well contributes independently to the transport without producing side effects.
Publisher
KOREAN PHYSICAL SOC
Issue Date
2018-03
Language
English
Article Type
Article
Keywords

FUNCTION MODEL; DEVICES; HETEROSTRUCTURE; PREWELLS

Citation

JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.72, no.5, pp.622 - 627

ISSN
0374-4884
DOI
10.3938/jkps.72.622
URI
http://hdl.handle.net/10203/241205
Appears in Collection
EE-Journal Papers(저널논문)
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