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Energy level alignment and spin polarization at tetracyanoquinodimethane/Fe and acridine orange base/Fe interfaces are investigated by means of photoelectron spectroscopy and X-ray magnetic circular dichroism (XMCD), respectively, to explore their potential application in organic spintronics. Interface dipoles are observed at both hybrid interfaces, and the work function of Fe is increased by 0...

Symmetry breaking and bonding at interfaces leads to a variety of anisotropy phenomena in transition metal sandwiches and multilayers. The charge density, the spin density and the orbital moment become anisotropic. These e!ects can be studied by the X-ray magnetic circular dichroism (XMCD) technique which senses the local anisotropy of charge, spin and angular momentum around an atom that is ex...

The X-ray magnetic circular dichroism (XMCD) has been measured at the Co K edge in hcp-Co and R-Co compounds (R=La, Tb, Dy). The structure of the experimental XMCD spectra in the near-edge region has been observed to be highly sensitive to the magnetic environment of the absorbing site. Calculations of the XMCD have been carried out at the Co K edge in Co 1 metal, LaCo 5 and TbCo 5 within the m...

First-principles calculations of electronic circular dichroism (ECD) are widely used to determine absolute configurations of chiral molecules. In addition, ECD is a sensitive probe for the three-dimensional molecular structure, making ECD calculations a useful tool to study conformational changes. In this review, we explain the origin of ECD and optical activity using response theory. While the...

Utilizing the line-group symmetry of single-wall nanotubes, we have assigned their electron-energy bands by symmetry-based quantum numbers. The selection rules for optical absorption are presented in terms of these quantum numbers. Different interband transitions become allowed as the polarization of incident light is varied, and we predict a substantial optical dichroism. We suggest how to obs...

T. A. Raybould,1, ⇤ V. A. Fedotov,1 N. Papasimakis,1 I. Kuprov,2 I. J. Youngs,3 W. T. Chen,4, † D. P. Tsai,4, 5 and N. I. Zheludev1, 6 Optoelectronics Research Centre, University of Southampton, SO17 1BJ, United Kingdom School of Chemistry, University of Southampton, SO17 1BJ, United Kingdom DSTL, Salisbury, United Kingdom Department of Physics, National Taiwan University, Taipei, 10617, Taiwan...

Crystalline films of La0.65Pb0.35MnO3 grown on ~100! LaAlO 3 substrates by rf sputtering have been investigated using magnetic circular dichroism and inverse photoemission spectroscopy. We find evidence for strong hybridization between unoccupied levels associated with Mn 3d and O 2p states. The oxygen atoms ‘‘pick-up’’ a small magnetic moment through hybridization with Mn. © 2000 American Inst...

N. Domingo,* B. E. Williamson, J. Gómez-Segura, Ph. Gerbier, D. Ruiz-Molina, D. B. Amabilino, J. Veciana, and J. Tejada Facultat de Fı́sica, Universitat de Barcelona, Avinguda Diagonal 647, 08028 Barcelona, Catalonia, Spain Department of Chemistry, University of Canterbury, Christchurch, New Zealand Institut de Ciència de Materials de Barcelona (CSIC), Campus Universitari, 08193 Bellaterra, Cata...

Circularly-polarized extreme ultraviolet and X-ray radiation is useful for analysing the structural, electronic and magnetic properties of materials. To date, such radiation has only been available at large-scale X-ray facilities such as synchrotrons. Here, we demonstrate the first bright, phase-matched, extreme ultraviolet circularly-polarized high harmonics source. The harmonics are emitted w...