Floquet bound states around defects and adatoms in graphene

Recent studies have focused on laser-induced gaps in graphene which have been shown to have a topological origin, thereby hosting robust states at the sample edges. While the focus has remained mainly on these topological chiral edge states, the Floquet bound states around defects lack a detailed study. In this paper we present such a study covering large defects of different shape and also vacancy-like defects and adatoms at the dynamical gap at $\hbar\Omega/2$ ($\hbar\Omega$ being the photon energy). Our results, based on analytical calculations as well as numerics for full tight-binding models, show that the bound states are chiral and appear in a number which grows with the defect size. Furthermore, while the bound states exist regardless the type of the defect's edge termination (zigzag, armchair, mixed), the spectrum is strongly dependent on it. In the case of top adatoms, the bound states quasi-energies depend on the adatoms energy. The appearance of such bound states might open the door to the presence of topological effects on the bulk transport properties of dirty graphene.Comment: 16 pages, 14 figure

Supporting reasonable adjustments for learners with disabilities in physical education: An investigation into teacher’s perceptions of one online tool

This study sets out to investigate physical education (PE) teachers’ perceptions of the use of an online professional development resource to support making reasonable adjustment for learners with disability. The Equality Act (2010) called on all UK schools to ensure access to PE was equitable for all learners. This means schools have to adopt strategies for making reasonable adjustments so as not to disadvantage learners with any special educational need and disability. Teachers report that they are working towards an inclusive classroom; however, parents of learners with disabilities report that there remains a lack of opportunities for their children to engage with activity. Using purposive sampling, participants were selected for the study after which they were asked to complete a continuing professional development online training course on the subject of making reasonable adjustments for learning with disabilities. Through one-to-one interviews, qualitative data were collected and analysed through thematic analysis. The findings indicated that the online resource was greeted positively by staff and not only supported the PE teachers but also increased their awareness of different approaches to making reasonable adjustments. The findings also indicated that the issue of making reasonable adjustments and the use of the online development tool need to be driven from the school senior leadership team if it is to have value for the whole school community

Key steps in the structure-based optimization of the hepatitis C virus NS3/4A protease inhibitor SCH503034

Crystal structures of protease/inhibitor complexes guided optimization of the buried nonpolar surface area thereby maximizing hydrophobic binding. The resulting potent tripeptide inhibitor is in clinical trials