Observation of negative differential mobility and charge packet in polyethylene
Observation of negative differential mobility and charge packet in polyethylene
Charge packet has been observed on many occasions but its physical mechanisms have never been properly understood. One of the models proposed by Lewis et al shows the presence of negative differential mobility with an electric field in semicrystalline polyethylene. In this paper we have observed the negative differential mobility using the transient space charge profile measured by the pulsed electroacoustic technique. By superimposing a short pulse voltage to a dc voltage, it is possible to obtain the velocity of holes at different applied fields. To the best of our knowledge we have for the first time observed negative differential mobility in polyethylene. This observation provides crucial evidence to support Lewis’s model and allows one to simulate charge packet and its behaviours.
212001
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhao, Junwei
b3fc6668-bcfd-4ba3-8c44-809cc7f26727
June 2011
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhao, Junwei
b3fc6668-bcfd-4ba3-8c44-809cc7f26727
Chen, George and Zhao, Junwei
(2011)
Observation of negative differential mobility and charge packet in polyethylene.
Journal of Physics D: Applied Physics, 44 (21), .
Abstract
Charge packet has been observed on many occasions but its physical mechanisms have never been properly understood. One of the models proposed by Lewis et al shows the presence of negative differential mobility with an electric field in semicrystalline polyethylene. In this paper we have observed the negative differential mobility using the transient space charge profile measured by the pulsed electroacoustic technique. By superimposing a short pulse voltage to a dc voltage, it is possible to obtain the velocity of holes at different applied fields. To the best of our knowledge we have for the first time observed negative differential mobility in polyethylene. This observation provides crucial evidence to support Lewis’s model and allows one to simulate charge packet and its behaviours.
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Published date: June 2011
Organisations:
Electronics & Computer Science, EEE
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Local EPrints ID: 272508
URI: http://eprints.soton.ac.uk/id/eprint/272508
ISSN: 0022-3727
PURE UUID: 77e4e903-aa88-4148-ac6e-195bc336cce7
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Date deposited: 22 Jun 2011 16:20
Last modified: 14 Mar 2024 10:03
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Author:
George Chen
Author:
Junwei Zhao
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