17 research outputs found
Plasma plume effects on the conductivity of amorphous-LaAlO<sub>3</sub>/SrTiO<sub>3</sub> interfaces grown by pulsed laser deposition in O<sub>2</sub> and Ar
Amorphous LaAlO3/SrTiO3 interfaces exhibit metallic conductivity similarto those found for the extensively studied crystalline-LaAlO3/SrTiO3 interfaces. Here, we investigate the conductivity of the amorphous-LaAlO3/SrTiO3 interfaces grown in different pressures of O2 and Ar background gases. During the deposition, the LaAlO3 ablation plume is also studied, in situ, by fast photography and space-resolved optical emission spectroscopy. An interesting correlation between interfacial conductivity and kinetic energy of the Al atoms in the plume is observed: to assure conducting interfaces of amorphous-LaAlO3/SrTiO3, the kinetic energy of Al should be higher than 1 eV. Our findings add further insights on mechanisms leading to interfacial conductivity in SrTiO3-based oxide heterostructures
Shear elastic modulus of magnetic gels with random distribution of magnetizable particles
Economic Profit Theories: The Discounted Cash Flow Method in the Evaluation of System Effect of the Integrated Structures
Polymyositis/Dermatomyositis: the current position
Polymyositis/dermatomyositis are a heterogeneous group of diseases characterised by
skeletal muscle inflammation and necrosis.' 2
Since an excellent clinical description in 1903 by
Steiner of dermatomyositis, which is essentially
still valid,3 much progress has been made
towards our understanding of this group of
diseases. The most widely used clinical classification of idiopathic inflammatory myopathies is
the one proposed by Bohan and Peter in 1975.4
That was a landmark, providing guidelines in
clinical practice to accurate diagnosis of inflammatory myopathies and standardisation of
studies. Nonetheless, the classification was
based on clinical data. In view of recent
histological and immunological studies the classification proposed by Karpati et al in 1987
seems better to fit our current view of such
diseases5 (table 1). In this review we focus on
recent developments in polymyositis/dermatomyositis, analysing separately the currently
considered third major form of inflammatory
myopathy-inclusion body myositis