Magnetoelectric Effect in Type-II Quantum Cone Induced by Donor Impurity

Colossal magnetoelectric effect induced by parametric amplification

We describe the use of parametric amplification to substantially increase the magnetoelectric (ME) coefficient of multiferroic cantilevers. Parametric amplification has been widely used in sensors and actuators based on optical, electronic, and mechanical resonators to increase transducer gain. In our system, a microfabricated mechanical cantilever with a magnetostrictive layer is driven at its...

Quantum states of a hydrogenic donor impurity in a cubic quantum dot by the finite difference method

The problem of a hydrogenic donor impurity in a cubic quantum dot with finite confinement potential is solved by the finite difference method. The discretized matrix equation needs to be solved for its eigenvalues and eigenfunctions. An algorithm of nonlinear programming is utilized for this problem. The results match references qualitatively in the weak regime, but introduce new problems in th...

Optical Aharonov-Bohm effect in stacked type-II quantum dots

Igor L. Kuskovsky,1,* W. MacDonald,1 A. O. Govorov,2 L. Mourokh,1 X. Wei,3 M. C. Tamargo,4 M. Tadic,5,6 and F. M. Peeters5 1Department of Physics, Queens College of CUNY, Flushing, New York 11367, USA 2Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA 3NHMFL, Tallahassee, Florida, 32310, USA 4Department of Chemistry, The City College of CUNY, New York, New York 10031...

Dispersion of Electric-Field-Induced Faraday Effect in Magnetoelectric Cr2O3

Quantum spin Hall effect in inverted type-II semiconductors.

The quantum spin Hall (QSH) state is a topologically nontrivial state of quantum matter which preserves time-reversal symmetry; it has an energy gap in the bulk, but topologically robust gapless states at the edge. Recently, this novel effect has been predicted and observed in HgTe quantum wells and in this Letter we predict a similar effect arising in Type-II semiconductor quantum wells made f...