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Why Phonon Behaviors in Transition Metal Dichalcogenides Matter

Published online by Cambridge University Press:  06 February 2019

Chenzhang Zhou  and
Kofi Adu
Chenzhang Zhou
Affiliation:
Pennsylvania State University, University Park, PA16802, U. S. A.
Kofi Adu*
Affiliation:
Pennsylvania State University, University Park, PA16802, U. S. A. Pennsylvania State University, Altoona, PA, 16601, U. S. A.
*
*(Email: [email protected])
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Abstract

Phonons are critical in understanding the electronic, optical and optoelectronic properties of transition metal dichalcogenides (TMDs). The interpretation of lineshapes is important for understanding the effect of specific physical processes on the electronic, optical and optoelectronic properties of TMDs. We employ an analytical approach to investigate the influence of the layered effect, the quantum size effect, the Breit-Wigner-Fano effect, and the inhomogeneous heating effect on the phonon lineshape of TMDs, using WS2 and MoS2 as prototypes. We demonstrate the similarities and differences in how individual processes affect the lineshapes and also the effect of combining processes. Such an approach is useful in guiding the interpretation of the phonon lineshapes of TMDs in particular, and nanostructures in general.

Keywords

2D materialsquantum dotquantum materialsRaman spectroscopy
Type
Articles
Information
MRS Advances , Volume 4 , Issue 10: Electronic, Photonic and Magnetic Materials , 2019 , pp. 629 - 634
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Copyright
Copyright © Materials Research Society 2019 

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