CMD2020GEFES: Explaining Observed Stability of Excitons in Highly Excited CdSe Nanoplatelets
Channel: Francisco García Flórez
Date: 28/07/2020

In this talk I present several theoretical and experimental results regarding the physics of excitons in CdSe nanoplatelets. After giving a motivation and presenting the experimental setup, I show the theory used for explaining those experimental measurements. I conclude with the latest theoretical results applied to this experimental system, as improvements to our model.


Slides: https://www.truevoid.dev/static/data/cmd_2020_gefes.pdf

For more information:

R. Tomar et al., "Charge Carrier Cooling Bottleneck Opens Up Nonexcitonic Gain Mechanisms in Colloidal CdSe Quantum Wells", J. Phys. Chem. C, vol. 123, no. 14, pp. 9640–9650, Apr. 2019, doi: 10.1021/acs.jpcc.9b02085.
Experimental procedure and measurements.

F. García Flórez, A. Kulkarni, L. D. A. Siebbeles, and H. T. C. Stoof, "Explaining observed stability of excitons in highly excited CdSe nanoplatelets", Phys. Rev. B, vol. 100, no. 24, p. 245302, Dec. 2019, doi: 10.1103/PhysRevB.100.245302.
Theoretical study of the measured data.

F. G. Flórez, L. D. A. Siebbeles, and H. T. C. Stoof, "Effects of Two-Dimensional Material Thickness and Surrounding Dielectric Medium on Coulomb Interactions and Excitons", arXiv:2002.05921 [cond-mat], Feb. 2020. Available: http://arxiv.org/abs/2002.05921.
Further theoretical analysis of the electron-hole interaction potential.

F. G. Flórez, L. D. A. Siebbeles, and H. T. C. Stoof, "Biexcitons in Highly Excited CdSe Nanoplatelets", arXiv:2003.14038 [cond-mat], Mar. 2020. Available: http://arxiv.org/abs/2003.14038.
Extension of the thermodynamical description with the addition of biexcitons.

M. Failla, F. G. Flórez, B. B. V. Salzmann, D. Vanmaekelbergh, H. T. C. Stoof, and L. D. A. Siebbeles, "Observation of the quantized motion of excitons in CdSe nanoplatelets", arXiv:2007.08359 [cond-mat], Jul. 2020. Available: http://arxiv.org/abs/2007.08359.
Experimental and theoretical analysis of Center-of-Mass motional states of excitons.