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Optical detection of charge accumulation in an electrically anisotropic semimetal of WTe2

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Title
Optical detection of charge accumulation in an electrically anisotropic semimetal of WTe2
Author(s)
Choi, Young-Gwan; Manh-Ha Doan; Gyung-Min Choi
Publication Date
2022-08
Journal
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.81, no.3, pp.267 - 272
Publisher
KOREAN PHYSICAL SOC
Abstract
Charge accumulation in a current-injected device provides important information about the electrical properties of materials. Conventionally, local charge accumulation is measured by potential drops at multiple positions in the device using a voltage probe. Here, we report on direct observations of the spatial distribution of charge accumulation in semimetal WTe2 via the polarization rotation microscopy technique. The mappings of the polarization rotation of the reflected light show that the injected charge carriers accumulate near the transverse boundaries of the device. Our results demonstrate an optical method to visualize charge accumulation profiles of the electrically anisotropic medium.
URI
https://pr.ibs.re.kr/handle/8788114/12156
DOI
10.1007/s40042-022-00539-2
ISSN
0374-4884
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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