Carrier density control of magnetism and Berry phases in doped EuTiO3

Theoretical description of carrier mediated magnetism in cobalt doped ZnO.

Substitutional cobalt in ZnO has a weak preference for antiferromagnetic ordering. Stabilization of ferromagnetism is achieved through n-type doping, which can be understood through a band coupling model. However, the description of the transition to a ferromagnetic ground state varies within different levels of band theory; issues arise due to the density functional theory underestimation of t...

Switching on magnetism in Ni-doped graphene: Density functional calculations

Chemical control of hole-doped superconductivity and magnetism in Gd2ÀxCexRuSr2Cu2O10Àd

Three Gd22xCexRuSr2Cu2O102d samples (x50.5, as prepared and after high pressure oxygenation and x 50.7) have been investigated by synchrotron powder x-ray diffraction and magnetization measurements. Precise coordinates and site occupancies for the oxygen atoms have been refined from the x-ray experiments. Estimates of the hole doping of the copper oxide planes based on the bond lengths, via the...

Nonabelian Berry Phases in Baryons

We show how generic nonabelian gauge fields can be induced in baryons when a hierarchy of fast degrees of freedom is integrated out. We identify them with nonabelian Berry potentials and discuss their role in transmuting quantum numbers in bag and soliton models of baryons. The resulting baryonic spectra both for light and heavy quark systems are generic and resemble closely the excitation spec...

development and implementation of an optimized control strategy for induction machine in an electric vehicle

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...