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67 papers · 1 filter
Negative magnetoresistance in strained -Sn and -SnGe films in an in-plane magnetic field
Sunny Phan, Andrei Kogan, Jesse Thompson +3
To test the hypothesis that the chiral anomaly is responsible for negative magnetoresitance (MR) in \atn{}, we have studied magnetotransport in strained, epitaxial films of pure \a…
Spatially Local Estimates of the Thermal Conductivity of Materials
C. Ugwumadu, A. Gautam, Y. G. Lee +1
In this paper we describe a spatial decomposition of the thermal conductivity, what we name "site-projected thermal conductivity", a gauge of the thermal conduction activity at eac…
Site-projected Thermal Conductivity: Application to defects, interfaces, and homogeneously disordered materials
A. Gautam, Y. G. Lee, C. Ugwumadu +3
With the rapid advance of high-performance computing and electronic technologies, understanding thermal conductivity in materials has become increasingly important. This study pres…
Physical origin of enhanced electrical conduction in aluminum-graphene composites
K. Nepal, C. Ugwumadu, K. N. Subedi +2
The electronic and transport properties of aluminum-graphene composite materials were investigated using ab initio plane wave density functional theory. The interfacial structure i…
Electronic Conductivity in Metal-Graphene Composites: The Role of Disordered Carbon Structures, Defects, and Impurities
K. Nepal, C. Ugwumadu, A. Gautam +2
This paper explores the transport properties of aluminum-carbon composite material via ab initio methods. Interfacial and electronic dynamics of the aluminum-graphene interface str…
Tilted Dirac cones and topological transitions in strained kagome lattices
M. A. Mojarro, Sergio E. Ulloa
We study effects of strain on the electronic properties of the kagome lattice in a tight-binding formalism with spin-orbit coupling (SOC). The degeneracy at the point evolves i…