The recent discovery of axion states in materials such as antiferromagnetic topological insulators has boosted investigations the magnetoelectric response and their promise towards realizing dissipationless electronics. In this paper, we develop a tight-binding methodology to explore emergence ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ proximity magnetic on top bottom surfaces. protection surface is ...

We numerically analyze the transmission through a thin disordered wire offinite length attached to perfect leads, by making use of banded random Hamiltonian matrices. We compare the Landauer and the Thouless conductances. and find that they are proportional to each other in the diffusive regime, while in the localized regime the Landauer conductance is approximately proportional to the square o...

We study the coherent spin-polarized transport through a zigzag-edge graphene flake (ZGF), using Hubbard model in the nearest neighbor approximation within the framework of the Green function’s technique and Landauer formalism. The system considered consists of electrode/ (ZGF)/electrode, in which the electrodes are chosen to be armchair nanoribbons. The study was performed for two types of ele...

In thermodynamics, one considers thermal systems and the maximization of entropy subject to the conservation of energy. A consequence is Landauer’s erasure principle, which states that the erasure of one bit of information requires a minimum energy cost equal to kT ln(2), where T is the temperature of a thermal reservoir used in the process and k is Boltzmann’s constant. Jaynes, however, argued...

Thermodynamic currents, such as energy, heat, and entropy production, can fluctuate significantly at the nanoscale. However, some less than others. Hyperaccurate currents are defined those which least, in sense that they maximize signal-to-noise ratio (precision). In this Letter we analytically determine what hyperaccurate quantum thermoelectrics, modeled by coherent transport Landauer-B\"uttik...

The environmental influence is inevitable but often ignored in the study of electronic transport properties small-scale systems. Such an environment-mediated interaction can generally be described by a parity-time symmetric non-Hermitian system with balanced distribution physical gain and loss. It quite known literature that along conventional junction current, another current called bias-drive...

The combined effects of an asymmetric (square or V-shaped) notch and uniaxial strain are studied in a zigzag graphene nanoribbon (ZGNR) device using a generalized tight-binding model. The spin-polarization and conductance-gap properties, calculated within the Landauer–Büttiker formalism, were found to be tunable for uniaxial strain along the ribbon-length and ribbon-width for an ideal ZGNR and ...

When a three-dimensional ferromagnetic topological insulator thin film is magnetized out-of-plane, conduction ideally occurs through dissipationless, one-dimensional (1D) chiral states that are characterized by a quantized, zero-field Hall conductance. The recent realization of this phenomenon, the quantum anomalous Hall effect, provides a conceptually new platform for studies of 1D transport, ...