Electric-field manipulation of spin states in confined non-magnetic/magnetic heterostructures

Electric-field control of exchange bias in multiferroic epitaxial heterostructures.

The magnetic exchange between epitaxial thin films of the multiferroic (antiferromagnetic and ferroelectric) hexagonal YMnO3 oxide and a soft ferromagnetic (FM) layer is used to couple the magnetic response of the FM layer to the magnetic state of the antiferromagnetic one. We will show that biasing the ferroelectric YMnO3 layer by an electric field allows control of the magnetic exchange bias ...

Long-Lived Spin Coherence States in Semiconductor Heterostructures

Dynamics of ultracold molecules in confined geometry and electric field

We present a time-independent quantum formalism to describe the dynamics of molecules with permanent electric dipole moments in a two-dimensional confined geometry such as a one-dimensional optical lattice, in the presence of an electric field. Bose versus Fermi statistics and selection rules play a crucial role in the dynamics. As examples, we compare the dynamics of confined fermionic and bos...

Electric Field Pretouch: Towards Mobile Manipulation

Pretouch sensing is longer range than contact, but shorter range than vision. Our hypothesis is that closed loop feedback based on short range but non-contact measurements can improve the reliability of manipulation. Such feedback may be particularly useful in mobile manipulation and personal robotics: mobility increases the robot’s position uncertainty, which the additional feedback can overco...

Spatiotemporal near-field spin microscopy in patterned magnetic heterostructures.

Low temperature femtosecond-resolved near-field scanning optical microscopy is used to image excitonic spin behavior in locally disordered magnetic semiconductor heterostructures. A contrast between luminescence intensity and polarization profiles yields marked differences between carrier diffusion and spin transport over a spin-dependent energy landscape sharply defined by focused ion beam imp...