A new method for measuring surface plasmon (SP) at a metal surface is presented. When exciting a surface plasmon at a metal surface, the metal film will be heated by SP, which leads to changes in its resistance; therefore, the dispersion of SP can be measured by this change. This method has several advantages: it is simpler, convenient, more sensitive and reliable than other known methods, and capable of using nonpolarized light.

Superconductivities in the 90K range as measured by resistance and magnetic susceptibility are reported for RBa₂Cu₃O_9-y(R=Y, Nd, Sm, Eu, Gd, Dy, Er, Tm, Yb) having the orthorhornbic perovskite structure. Unstable resistance drop above 100K has been found in ErBCO, probably associated with interfacial superconductivity.

CP violation in the standard model with four generations of quarks in examined using rephasing invariants of the mixing matrix. A condition for CP invariance is presented and proved. CP violations in different sections are connected by orthogonal conditions.

A high Tc Y-Ba-Cu-O superconductor was prepared with a zero-resistance temperature at 89.9K. High resolution electron microscopy (HREM) indicates that the structure of this material is multiphase and looks like some insulating islands surrounded by regions of conductive phase. There exist many defects in the conductive phase which will be transformed into non-crystalline state after prolonged electron bombardment.

The acoustic Plasmons have been considered as a possible mechanism for superconductivity in heavy-fermion systems with s-and f-electons. This may be used to explain the exotic properties observed in heavy-fermion superconductors.

The crystal structure and superconductivity of the compound Ba₂YCu₃O_9-x are orted in this paper. The compound has an orthorhombic distorted perovskite structure cell with a=3.892Å, b=3.824Å and c=11.64Å. The temperature at the middle point of superconducting transition is 93.6K.

Multi-mode and chaotic oscillations have been observed in an acoustic hybrid system with single peak frequency response and time-delay. The envelope of the frequency spectrum, as constrained by the frequency response, is comb-shaped. The numerical calculations show approximate agreement with the experimental result.

An experiment in which a rotating magnetic field was used to drive current in a cylindrical device was described. The driven current was of sufficient size to reverse the applied axial field. such an equilibrium could equally well be termed a field reversed configuration (FRC). In this experiment the FRC lifetime appeared to be limited by the duration of the rotating field pulse (40ms) with no evidence of gross instabilities.

In this paper, the authors present a cosmological solution of a six-dimensional Einstein-gauge unification theory to which is added a matter term. This exact solution appears that cosmology of the very early universe may differ considerably from the usually contemplated "scenarios".

Si wafer (N-type, P-doped, 1kΩ-cm) was implanted with ¹¹¹In by nuclear reaction recoils. Thermal annealing behavior of In in Si was studied by the time differential perturbed angular correlation technique. It is found that after 798°C annealing 55% of the In atoms occupy substitutional lattice sites in Si with the remainder in perturbed sites.

We analysed d=10, 0(32) superstring theory with a cosmological constant for possible Kaluza-Klein cosmologies. In the former case (scalar field Ф=constant) we find an oscillating (2+l)-dimensional antide Sitter universe with a constant value for all fields on the internal dimensions, which are S¹x S³x S³. In the latter case, it is not possible to get. a power law form solutions. In the oscillating solutions the induced cosmological constant is less than 10^-120M_p^-4 calculated according to supergravity theories.

Using photoreflectance (PR) at room temperature, we have studied GaAs/AlGaAs multi-quantum wells(MQWs) grown by molecular beam epitaxy. Analysis shows that the modulation mechanism of PR of MQWs is Stark shift of the subbands produced by photo-injection of carriers, which has first derivative functional lineshapes. By fitting the experimental spectra, an unusual transition coming from the interfaces in MQWs was observed.