In:
Applied Physics Letters, AIP Publishing, Vol. 115, No. 15 ( 2019-10-07)
Abstract:
Using density functional theory combined with nonequilibrium Green's function, the photocurrent induced by the photogalvanic effect of two phases of Te-based monolayer materials is calculated along both their zigzag and armchair directions under the irradiation of the linearly polarized light. Results show that the photocurrent has a sinusoidal shape with regard to the polarization angle of the light at all simulated bias voltages for different photon energies. A photocurrent peak for α-Te and β-Te is at the photon energy of around 1.4 and 1.8 eV, respectively. Furthermore, for α-Te the phase of the photocurrent vs the polarization angle curve reserves when the photon energy increases, while for β-Te the phase remains unchanged in our simulated photon energy range. The different optical responses of the two phases of Te-based monolayer materials along different directions make them have potential applications in various aspects of optoelectronics.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2019
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0
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