Work

Tuning the soft bandgap in the density of the states: The measurement of a "magnetogap" effect in carbon-black samples

Year: 2024

Type: article

Abstract: We investigated the magnetic field dependence on the variable range hopping electron conduction in carbon-black samples with different volumetric densities. By applying the concepts and equations of hopping regimes when the magnetic field is applied, we were able to establish a connection between the variation of the hopping temperatures, T ES and T M , with the localization radius of electron conduction in carbon-black, as well as with the density of states of this material. The volumetric density dependence of all these physical quantities is also discussed. Finally, based on the magnetic field effects on the hopping parameters, we introduced the idea of a " Magnetogap " effect, indicating how the Coulomb gap changes with the magnetic field.

Source: Carbon Trends

DOI: 10.1016/j.cartre.2024.100422

Authors: A. Aparecido-Ferreira, E.S. Alves, G.M. Ribeiro, J.F. Sampaio

Institutions: Universidade Federal do Paraná, Universidade Federal de Minas Gerais

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,610

OpenAlex ID: W4404135022

FWCI: 0.077

Cites: 48

Cited by: 1

Related to: 10