It is shown that the coupling between magnetic layers separated by nonmagnetic metallic superlattices can decay exponentially as a function of the spacer thickness N , as opposed to the usual N decay. This effect is due to the lack of constructive contributions to the coupling from extended states across the spacer. The exponential behavior is obtained by properly choosing the distinct metals a...

The mid-infrared transmission through a 3.7 mm period, twodimensional sub-wavelength Au metallic hole array integrated on a GaSb/InAs strained layer superlattice nBn photodetector is measured. The surface plasmon-polariton excitation on the Au film induces a peak transmission in the 200 K detector response at 4.2 mm. This transmission is enhanced threefold by the insertion of a SiNx layer betwe...

We examine the application of short-circuit electrical boundary conditions in density-functional theory calculations of ferroelectric thin films. Modeling PbTiO3 films with metallic electrodes, we demonstrate that under periodic boundary conditions of supercells, short-circuit conditions for the electrodes are equivalently satisfied in two repeated slab geometries: a PbTiO3/metal superlattice g...

We report the observation of a dense triangular network of one-dimensional (1D) metallic modes in a continuous and uniform monolayer of MoSe(2) grown by molecular-beam epitaxy. High-resolution transmission electron microscopy and scanning tunneling microscopy and spectroscopy studies show that these 1D modes are midgap states at inversion domain boundaries. Scanning tunneling microscopy and spe...

We have fabricated perovskite superlattices consisting of two ferromagnetic metallic oxides: La0.67Ca0.33MnO3 ~LCMO! and SrRuO3 ~SRO!. We have investigated the magnetotransport and magnetic properties of a series of samples, in which the layer thickness of LCMO is fixed and that of SRO varied from 0 to 20 unit cells. The magnetoresistance ratio in a superlattice can be increased by a factor of ...

A technique of low-energy proton irradiation has succeeded in increasing perpendicular magnetic anisotropy (PMA) of phase-transformed Co/Pd superlattice and confirmed to provide a capability of achieving a magnetic recording density over 2.5 Tb/in2 [1]. Our x-ray magnetic circular dichroism study confirmed that the strong PMA is originated from an increase in the out-of-plane component of spin-...

Metallic surface states on semiconducting substrates provide an opportunity to study low-dimensional electrons decoupled from the bulk. Angle resolved photoemission is used to determine the Fermi surface, group velocity, and effective mass for surface states on Si(111))3)-Ag, Si(111))3)-Au, and Si(111)A21 3A21-(Ag1Au). For Si(111))3)-Ag the Fermi surface consists of small electron pockets popul...