Theory of charge transport

The Microscopic Response Method

• M. Zhang and D. A. Drabold, Electrical conductivity calculations: the role of degenerate and resonant electron states, Phys. Rev. B 81 085210 (2010).
• M. Zhang and D. A. Drabold, Phonon-driven transport in amorphous semiconductors: transition probabilities, Eur. Phys. J B 77 7 (2010).
• M. Zhang and D. A. Drabold, Alternative approach to computing transport coefficients: application to conductivity and Hall coefficient of hydrogenated amorphous silicon, Phys. Rev. Lett. 105 186602 (2010).
• M. Zhang and D. A. Drabold, Theory of charge carrier transport in systems with static and thermal disorder, Phys. Stat. Sol. B 248 2015 (2011).

Limitations and approximations of the Kubo and Kubo-Greenwood formulae

• M. Zhang and D. A. Drabold, The work done by an external electromagnetic field, J. Phys. Cond. Matter 23 085801 (2011).
• M. Zhang and D. A. Drabold, Transport calculations in complex materials: a comparison of the Kubo formula, the Kubo-Greenwood formula and the microscopic response method, Phys Rev E 83 012103 (2011).
• M. Zhang and D. A. Drabold, Electrical conductivity calculations: the role of degenerate and resonant electron states, Phys. Rev. B 81 085210 (2010).

Resolution of the Hall effect sign anamoly in amorphous silicon

• M. Zhang and D. A. Drabold, Alternative approach to computing transport coefficients: application to conductivity and Hall coefficient of hydrogenated amorphous silicon, Phys. Rev. Lett. 105 186602 (2010)

Projections of electrical conduction processes into space: “Space-Projected Conductivity”

• K. Subedi, K. Prasai and D. A. Drabold, Space-projected conductivity and spectral properties of the conduction matrix, in “Form and Function of Disorder”, Physica Status Solidi B 2000438 (2020). https://doi.org/10.1002/pssb.202000438
• K. Prasai, P. Biswas, K. Subedi, K, Ferris and D. A. Drabold, Spatial projection of electronic conductivity, the example of conducting bridge computer memory,  PSS Rapid Research Letters, https://doi.org/10.1002/pssr.201800238
• K. Subedi, K. Prasai, M. N. Kozicki, and D. A. Drabold, Structural origins of electronic conduction in amorphous copper-doped alumina,  Phys. Rev. Materials 3 065605 (2019).
• R. Thapa, B. Bhattarai, M. N. Kozicki, K. N. Subedi and D. A. Drabold, Structure and charge transport of amorphous Cu-doped tantalum pentoxide: an ab initio study,  Phys. Rev. Materials 4 064603 (2020)
• K. N. Subedi, K. Kappagantula, F. Kraft, A. Nittala, and D. A. Drabold, Electrical conduction processes in aluminum: defects and phonons, Phys. Rev. B 105 104114 (2022).
• K. Subedi, K. Nepal, C. Ugwumadu, K. Kappagantula and D. A. Drabold, Electronic transport in copper graphene composites, Applied Physics Letters 122 031903 (2023).
• K. Nepal, C. Ugwumadu, A. Gautam, K. Kappagantula and D. A. Drabold, Electronic conductivity in metal-graphene composites: the role of disordered carbon structures, defects and impurities, J. Phys. Materials 7 025003 (2024) pdf here.
• K. Nepal. C. Ugwumadu, K. N. Subedi, K. Kappagantula and D. A. Drabold, Physical origin of enhanced electrical conduction in aluminum-graphene composites, Applied Physics Letters 124, 091902 (2024).