A metastable phase of FeSi 2 that is not present in the bulk phase diagram can be grown epitaxially on Si(111). Scanning tunneling microscope images reveal the surface reconstruction of this phase and allows one to model its crystallographic structure. It crystallizes with a cubic structure, probably a fluorite structure like CoSi 2 and NiSi2, lattice-matched to Si. The (111) surface has a 2 × ...

The occupied and unoccupied electronic structure of thin epitaxial CoSi(2) films grown on Si(111) substrates was studied using time-resolved two-photon photoemission and valence-band photoemission spectroscopy. The work function of the sample surfaces and the Schottky barrier height at the metal-semiconductor interface were measured as a function of annealing temperature. The photoemission data...

Introdução: Associação entre adaptação de próteses auditivas e treinamento auditivo pode melhorar a comunicação do indivíduo reduzir os déficits funcionais. Objetivo: verificar o benefício na qualidade vida, sintomas depressivos, aspectos cognitivos, resolução temporal limitação em atividades vida idosos com perda auditiva, após associadas ou não ao musical. Métodos: Grupo Experimental - GE: ci...

Mapping full-field displacement and strain changes on the Earth’s surface following an earthquake is of paramount importance to enhance our understanding of earthquakemechanics. Currently, aerial and satellite images taken preand postearthquake can be processed with sub-pixel correlation algorithms to infer the co-seismic ground deformations (e.g., [1, 2]). However, the interpretation of this d...

The absence of mirror symmetry, or chirality, is behind striking natural phenomena found in systems as diverse DNA and crystalline solids. A remarkable example occurs when chiral semimetals with topologically protected band degeneracies are illuminated circularly polarized light. Under the right conditions, part generated photocurrent that switches sign upon reversal light's polarization, known...

The positron annihilation lifetimes were measured using a 48V source in noncentrosymmetric cubic single crystals of CoSi, FeSi and MnSi. following determined from the time spectra: 168(1) ps for 114(1) 111(1) For single-crystal lifetime was also with 22Na source. obtained different sources are consistent. differences MnSi FeSi, on one hand, Weyl semimetal other possibly caused by formation + el...