Dresden 2026 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 23: Transport Properties

HL 23.7: Vortrag

Mittwoch, 11. März 2026, 11:15–11:30, POT/0051

Modeling the impact of dynamic disorder on optical conductivity of semiconductors using a Kubo approach — •Frederik Vonhoff¹, Michel Panhans², David R. Reichman³, Frank Ortmann², and David A. Egger¹ — ¹Physics Dep., TUM School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany — ²Dep. of Chemistry, TUM School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany — ³Dep. of Chemistry, Columbia University, New York, NY 10027, USA

Semiconductor devices rely critically on efficient charge-carrier transport, making it essential to understand the underlying transport mechanisms. The optical conductivity is a key transport observable, both experimentally and theoretically, for identifying the scattering mechanisms and transport regimes. However, modeling the transport properties of semiconductors with strong nuclear vibrations is challenging due to the resulting dynamic disorder in the electronic structure [1, 2]. Addressing these challenges, we develop a dynamic-disorder-driven microscopic method to compute optical conductivities in one- and three-dimensional semiconductor model systems by integrating time-dependent electronic Hamiltonians in Kubo transport theory. By systematically varying the static and dynamic disorder strength, we investigate the transition from localization to transient localization to and diffusive behavior, providing insights into scattering mechanisms active in emerging semiconductor materials such as halide perovskites.

[1] J. Fetherolf, et al, Physical Review X 10, 021062 (2020)

[2] F. Vonhoff, et al, Physical Review Materials 9, 094601 (2025)

Keywords: charge-carrier transport; optical conductivity; electronic transport regimes; dynamic disorder; Kubo transport theory