The magnetic polariton spectrum characteristic of collective behavior in magnetic/nonmagnetic superlattices has been obtained within the framework of a macroscopic theory.

The relationship between the Structural type of anionic group and SHG effect in oxide compounds has been reviewed.

The β-functions of the SU(2) Lattice gauge theories with SIN and EXP actions are investigated by means of Monte Carlo renormalization group method (MCRG). Only one ultraviolet fixed point is observed. The finite size effect and the connection with the continuum limit are discussed.

The application of HREELS to the study of the Ag(100)/Na+O₂ system reveals the presence of molecularly adsorbed oxygen species at room temperature. This may help explain why alkali metals can enhance the selectivity of an Ag catalyst towards the formation of C₂H₄O.

An up to date most detailed information of H(Hole) as well as E(Electron) traps produced by low dose (10¹¹cm^-2) boron and phosphorus implantation in n-Si and their thermal annealing behaviours are reported. For the first time, two hole traps H2(0.62), H3(0.49) of huge concentrations were detected in B+ implanted n-Si. They are tentatively assigned as boron related acceptors. H2(0.51) of huge concentration were detected in P⁺ implanted n-Si. Other three hole traps H1(0.63), H4( 0.37) and H5(0.15) were detected in both B⁺ and P⁺ implanted n-Si; they are thus unrelated to boron. E traps are also reported; some of these E traps are consistent with previous reports and some are new.

The inverse scattering method is applied to the Heisenberg ferromagnet chain with an easy axis. The Gelfand-Levitan-Marchenko equation is found. From the equation the one-soliton solution is obtained as an example.

A modified hamiltonian of lattice gauge theory including 2-plaquette, interaction has been studied. We have found the exact ground state of the theory.

SERRS has been developed for observing a weak enhancement of SERS. A SERS from dye molecules 1555 adsorbed on Copper surface was observed at 4880Å excitation and this result could be qualitatively explained by the antenna model of SERS.

Color centers stable at room temperature with absorption bands peaking at 365m, 460nm, 540nm and 620nm were produced in LiNbO₃ crystals by γ-radiation, Measurements with XPS (X-ray photoelectron energy spectroscopy) and ESR (electron spin resonance) techniques show that the concentration of Nb⁴⁺ ion is high in the reduced LiNbO₃ crystal but no typical ten-line Nb⁴⁺ ESR spectrum appears. The experimental results can be explained by the Nb⁴⁺ ion-F⁺ center association model.

The polarized Raman spectra of lithium yttrium fluoride crystal for the incident light along different axes are presented and the vibrational modes of the crystal structure are discussed.

We report here some new anomalous pulse optogalvanic signals arising from transitions between different levels of metal atoms and suggest a possible mechanism to explain this phenomenon.

A recursion formula for the number of stable cycles in the cubic map is given by analysing different types of bifurcations and investigating the stability of all periodic orbits.