An outline is given of the spin space-group classi cation of quasiperiodic arrangements of spins. It is based on an extension to multicomponent quasiperiodic elds of the Fourierspace approach to crystal symmetry. The classi cation of decagonal spin space groups in two dimensions is given as an example. A group theoretic argument is given which is used to determine extinctions in a neutron di ra...

Quantum tunneling of magnetization and quantum phase interference have been intensively studied in single molecule magnets (SMMs), high spin molecules with an easy axis (Ising) type magnetic anisotropy. SMMs have also been proposed as candidate qubits—and very recently several groups have reported the observation of coherent spin dynamics in pulsed EPR studies. In the first part of this talk I ...

We show that inversion symmetry breaking together with spin-orbit coupling leads to coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides, making possible controls of spin and valley in these 2D materials. The spin-valley coupling at the valence-band edges suppresses spin and valley relaxation, as flip of each index alone is forbidden by the valley-contrasting...

For surface systems, the Rashba effect is studied by using a k·p perturbation method. It is shown that the velocity-operator term in the perturbation gives the generalized Rashba Hamiltonian, of which a group-theoretical analysis is given to explain variations in the spin splitting and spin structure expected for typical surface symmetry. The matrix elements of the velocity and spin-angular-mom...

Supramolecular principles have been applied for improving the spin crossover activity of metal centers due to cooperative effects in solution. Thus, incorporation of alkyloxy tails at the phenyl group of Fe(sal2trien) 2a provides amphiphilic complexes Fe(sal-OR2trien) 2b-d (b, R = C6H13; c, R = C8H17; d, R = C18H37) comprising an apolar group for supramolecular organization and a polar headgrou...

Objective: Social Phobia, one of the most common psychological disorders, can cause serious discomfort and impairment in a person’s life. The importance of assessing the specific features of this disorder is well-known. This paper assesses the psychometric properties of the Italian version of the Social Phobia Inventory (I-SPIN). Method: Data from 410 subjects were analyzed in order to assess t...

our main objective is a better understanding of spin spin interaction of dinuclear copper(ii) complexes through  system. the synthesis and characterization of two new dinuclear copper(ii) complexes, based on the use of large, pyrole-containing macrocycles, the so called “ expanded porphyrins” , [cu2(macrocycle)]4+ is described. a chloroform solution spectrum of two complexes taken at room tem...

We study the domain formation in the ν = 2/3 fractional quantum Hall systems basing on the density matrix renormalization group (DMRG) analysis. The ground-state energy and the pair correlation functions are calculated for various spin polarizations. The results confirm the domain formation in partially spin polarized states, but the presence of the domain wall increases the energy of partially...

The nature of chemical bonds in heavy main-group diatomics is discussed from the viewpoint of effective bond orders, which are computed from spin-orbit wave functions resulting from spin-orbit configuration interaction calculations. The reliability of the relativistic correlated wave functions obtained in such two-step spin-orbit coupling frameworks is assessed by benchmark studies of the spect...

We present a simple method, combining the density-matrix renormalization-group (DMRG) algorithm with finite-size scaling, which permits the study of critical behavior in quantum spin chains. Spin moments and dimerization are induced by boundary conditions at the chain ends and these exhibit power-law decay at critical points. Results are presented for the spin-1/2 Heisenberg antiferromagnet; an...