We introduce a fully coherent way for directed transport of neutral atoms in optical lattices by regularly performing phase shifts on the lattice potential during the free evolution of the system. This paves the way for realizing quantum gates and entanglement generation by bringing two individual atoms in the proximity of each other and let them interact. The speed of our protocol is truly det...

We study the magnetic structure of layered Li1−xNi1+xO2 and propose a new scheme: the AF interaction between the excess Ni in the Li layers and the Ni ions in the Ni planes, gives rise to the formation of ferrimagnetic clusters, which control the physics of these systems. The values of the different interactions are estimated from a mean field calculation in the high temperature limit. For the ...

The 5d5 iridate CaIrO3 is isostructural with the post-perovskite phase ofMgSiO3, recently shown to occur under extreme pressure in the lower Earth’smantle. It therefore serves as an analog of post-perovskiteMgSiO3 for awide variety of measurements at ambient conditions or achievable with conventional multianvile pressure modules. By multireference configuration-interaction calculations we here ...

A proper understanding of the mechanism for cuprate superconductivity can emerge only by comparing materials in which physical parameters vary one at a time. Here, we present a variety of bulk, resonance and scattering measurements on the (CaxLa1−x ) (Ba1.75−xLa0.25+x ) Cu3Oy high temperature superconductors, in which this can be done. We determine the superconducting, Néel, glass and pseudopag...

A detailed ab initio DFT/GGA and DFT /GGA+U investigation of codoping ZnO with Co and Cu ions reveals the role of Cu and the existence of optimum structural dopant configurations which could lead to the enhancement of ferromagnetism. The role of the Cu ions in Zn Co,Cu O is to act as superexchange mediators while causing a remote delocalization through the hybridization of the Cu d3z2−r2 spin-m...

A coexistent system of itinerant and Iocalized electrons was prepared and the magnetic properties of bath electron~ were investigated. a-(BEDT-TTF)2CSCOjSCN)4 (abbreviated as the Csco Salt ), a-(BEDT-TTF)2RbCOjSCN)4 (the Rbco Salt), and a"-(BEDT-TTF)2 Ki 4Co(SCN)4 (the KCO Salt), undergo metal-insulator transitions at 10 K, 190 K, and 130 K. respectively. The ESR measurement of the Rbco sait in...

The viability of dilute magnetic semiconductors in applications is linked to the strength of the magnetic couplings, and room temperature operation is still elusive in standard inorganic systems. Molecular semiconductors are emerging as an alternative due to their long spin-relaxation times and ease of processing, but, with the notable exception of vanadium-tetracyanoethylene, magnetic transiti...

We investigate the interaction of TbPc(2) single molecule magnets (SMMs) with ferromagnetic Ni substrates. Using element-resolved x-ray magnetic circular dichroism, we show that TbPc(2) couples antiferromagnetically to Ni films through ligand-mediated superexchange. This coupling is strongly anisotropic and can be manipulated by doping the interface with electron acceptor or donor atoms. We obs...

We investigate the effect of the experimentally observed Jahn-Teller distortion of the oxygen octahedra in LaTiO3 on the magnetic exchange. We present a localized model for the effective hopping between nearestneighbor Ti ions and the intrasite Coulomb interactions, based on a nondegenerate orbital ground state due to the static crystal field. The latter corresponds to an orbital order which ha...

NiS, exhibiting a text-book example of a first-order transition with many unusual properties at low temperatures, has been variously described in terms of conflicting descriptions of its ground state during the past several decades. We calculate these physical properties within first-principle approaches based on the density functional theory and conclusively establish that all experimental dat...