In 1879 E. H. Hall observed that when an electrical current passes through a sample placed in a magnetic field, a potential proportional to the current and to the magnetic field is developed across the material in a direction perpendicular to both the current and to the magnetic field [1]. This effect is known as the Hall effect, and is the basis of many practical applications and devices such ...

The quantum Hall conductance of a disordered two-dimensional gas of non-interacting electrons is reexamined for its integrity against disorder in the limit of no mixing between different Landau levels. The exact one-electron eigenstates of the disordered system are shown to be current carrying, with exactly the same Hall current as in the absence of disorder. There are no localized states. Acco...

Students’ residence halls have been studied repeatedly during the last decades from various perspectives (eg satisfaction). However, our knowledge is very limited in terms of students’ emotions towards various residence hall interior and exterior spaces. Besides, very little study exists on the impact of homelike furniture on students’ emotions. The question driving this research is whether the...

We report on an all-electrical measurement of the spin Hall effect in epitaxial Fe/InxGa(1-x)As heterostructures with n-type (Si) channel doping and highly doped Schottky tunnel barriers. A transverse spin current generated by an ordinary charge current flowing in the InxGa(1-x)As is detected by measuring the spin accumulation at the edges of the channel. The spin accumulation is identified thr...

The persistent Hall voltage and current in an isolated annulus in a strong perpendicular magnetic field, at filling factor ν = 1/q, and in the presence of a weak constriction is obtained as a function of temperature, and flux piercing the annulus. A thermodynamic Hall conductance is found which has a universal value even with back scattering at the constriction.

Hall effect sensor technology has advanced signifi cantly, offering high performance, accuracy, consistency, reliability, and new feature sets at reasonable costs. Now leading the way in high-volume automotive applications, which are cost-sensitive, quality and reliability conscious, and subjected to harsh environments, Hall effect devices have distinguished themselves, and have become the pref...

The filling fraction 1/k double layered quantum Hall state has been shown to exhibit many superfluid properties including the appearance of an alternating tunnelling current in response to an external voltage V. Here we propose the notion of “sideways tunnelling”, in which a current tunnels between two such 1/k states through an incompressible fractional quantum Hall state of filling fraction 2...

For the characterization of n-channel 4H-SiC MOSFETs, current-voltage and Hall-effect measurements were carried out at room temperature. To interpret the Hall-effect measurements, the Hall factor for the electron transport in the channel of SiC MOSFETs was evaluated, for the first time. The method of the Hall factor calculation is based on the interdependence with mobility components via the re...

The spin Hall effect is the appearance of a transverse spin current in a non-magnetic conductor by pure electrical control. The extrinsic spin Hall effect originates from the spin-dependent skew scattering of electrons by impurities in the presence of SOI and can be used for an efficient conversion of charge current into spin-polarized currents. Recently, it has been explored for replacing ferr...

This study deals with the optimization control of a single-phase brushless DC motor (BLDCM) with Hall sensor. A simple modeling method with feasible parameter identification is adopted to meet characteristics of singlephase BLDCM. With the linear Hall sensor feedback, the advantages of current-mode control scheme and softcommutation scheme are proposed to achieve maximum efficiency over the ent...