Ellipsometry study of thin metallic films under constraint by the size effect

Received: 9 July 1997/Accepted: 17 October 1997     

Porous layer effects on soft X-ray radiation emitted from a plasma generated by 130-fs laser pulses irradiating a porous silicon target

Received: 2 May 1997/Revised version: 17 October 1997     

On the dynamic interaction between moving dislocations

Received: 25 August 1997/Accepted: 23 October 1997     

Ion strings for quantum gates

Received: 6 August 1997/Revised version: 21 October 1997     

Heat diffusion and debris screening in Er:YAG laser ablation of hard biological tissues

Received: 25 March 1997/Revised version: 15 October 1997     

Nanocrystalline-grained Bi-Sr-Ca-Cu-O and its superconducting property

Received: 5 August 1997/Accepted: 2 October 1997     

Phase-modulation-induced two-wave mixing in a temporal-nonlocal medium

Received: 27 October 1997/Revised version: 11 December 1997     

High quality GaAs quantum wires grown by flow rate modulation epitaxy

Accepted: 14 October 1997     

Chirp control in third-harmonic generation due to cross-phase modulation

Received: 16 October 1997/Revised version: 16 January 1998     

Formation of amorphous layers by solid-state reaction. from thin Ir films on Si(100)

Received: 18 November 1997 / Accepted: 16 October 1998 / Published online: 24 February 1999     

Pump-energy-dependent photo-ionization and collisional ionization in two-photon-resonant- and three-photon-ionization processes

Received: 14 October 1997/Revised version: 7 January 1998     

Influence of cathode roughness on discharge homogeneity of a high-pulse repetition frequency long-pulse XeCl laser

Received: 17 October 1997/Revised version: 3 March 1998     

The analysis of the precision of single shot 2λ-CARS temperature measurements in hydrogen

Received: 16 October 1996/Revised version: 17 March 1997     

Continuous-wave light source at 317 nm based on frequency doubling of a diode laser

Received: 16 October 1997     

Rotational effects in low energy dissociative recombination of diatomic ions

The effect of rotational interaction in the low energy dissociative recombination process of diatomic molecules has been explored for typical molecular ions () which sample a large range of molecular masses. We show that rotation plays a role mainly for the indirect recombination process through bound Rydberg states, and for light molecules. When the direct process based on a strong electronic interaction is fast and dominating, rotational couplings can be safely neglected especially for heavier molecules like NO. Received: 18 September 1997 / Revised in final form: 17 October 1997 / Accepted: 20 October 1997     

Mirrorless laser action by randomly distributed feedback in amplifying disordered media with scattering centers

Received: 12 August 1997/Revised version: 16 October 1997     

The ion trap quantum information processor

Received: 16 October 1996/Revised version: 2 April 1997     

Laser frequency stabilization using selective reflection spectroscopy

1 line. We discuss the performance of this novel frequency stabilization scheme and analyze its dependence on various system parameters. The technique is compared to the commonly used saturation spectroscopic techniques. Received: 8 September 1997/Revised version: 16 October 1997     

Nanotomographic examinations of ion tracks in cellulose nitrate by ion energy loss spectrometry

Received: 13 October 1997/Accepted: 25 August 1998     

Ferromagnetic ground state in the Kondo lattice model

We present a series of rigorous examples of the Kondo lattice model that exhibit full ferromagnetism in the ground state. The models are defined in one-, two- and three-dimensional lattices, and are characterized by a range of hopping terms, specific electron filling, and large ferromagnetic coupling. Our examples show that a sufficient strong but finite exchange coupling between conduction electrons and localized spins could overcome the competition from mobility of a finite density of electrons and drive the system from a paramagnetic phase to a ferromagnetic phase. We also establish a relation of ferromagnetism between the Hubbard model and Kondo lattice model. Meanwhile some rigorous results on ferromagnetism in the corresponding Hubbard model are presented. Received: 10 September 1997 / Revised: 15 October 1997 / Accepted: 17 October 1997