Are you on Facebook? Twitter, perhaps? Maybe LinkedIn? What about a social networking site dedicated to materials science? If you are not, you may be more alone than you think… 16 February 2010
We review our recent efforts in understanding the resonance properties of metallic ring systems using a rigorous mode-expansion theory. In the quasi-static limit, we established a matrix-form circuit equation to calculate the frequencies and current distributions for all resonance modes in a ring system. We then applied the theory to study different split ring resonators (SRR). 12 January 2010
In this article, we have reviewed recent progresses on the negative refraction and the abnormal transmission of electromagnetic wave in two-dimensional photonic crystals. The physical mechanisms related to these phenomena have been analyzed, and the focusing properties of the point source through the photonic-crystal-based flat lens have been discussed. 12 January 2010
Nature is the best example of a system functioning on the nanometer scale, where the involved materials, energy consumption and data handling are optimized. Opening the doors to the nanoworld the emergence of the scanning tunneling microscope in 1982 and the atomic force microscope in 1986 led to a shift of paradigm in the understanding and perception of matter at its most fundamental level. 24 August 2009
The understanding of electronic behaviour in systems with reduced dimensionality and length scale is a central theme of contemporary condensed matter physics. The unique capabilities of neutron scattering make it an ideal method to study the atomic and molecular, chemical and magnetic structure of a wide class of materials. In this review we highlight recent studies where neutron techniques have been applied to emergent materials and look forward to the possibilities enabled by instrumentation on the ISIS Second Target Station. 14 August 2009
Knowledge of the motions of atomic positions or magnetic fluctuations enables the strength, range and symmetry of the interatomic forces and magnetic coupling in a material to be determined. Increasingly, many of the materials of interest in condensed matter physics are characterised by the coupled interactions between more than one of the charge, lattice, magnetic and atomic orbital motions in all three spatial directions. New experimental approaches combining data from hundreds of neutron scattering datasets coupled with advanced visualisation software now enables complete mapping of the dynamics in materials on a routine basis. 14 August 2009
Nanoscience and nanotechnology are closely intertwined subjects that are attracting ever-increasing attention, both in the scientific world and in the marketplace. Major developments in growth and synthesis methods mean that atoms can nowadays be manipulated in a controlled fashion to produce novel properties that are often not found in bulk materials. 21 January 2009
In solid-state physics two different paradigms are typically applied. The first is a local picture, in which one visualizes the quantum states of electrons in atomic orbitals or at impurity atoms in real space (r-space). The second is the momentum or reciprocal space (k-space) picture, where electrons are viewed as de Broglie waves completely delocalized throughout the material. 19 August 2008
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