In chemistry and physics symmetry principles are all important, for example, leading to the selection rules governing optical transitions. We have investigated the influence of the molecular symmetry on the surface potential landscape of molecules in the limit of weak molecule-substrate binding. For this purpose, the induced lateral motion of Cu(II)-tetraazaphthalocyanine molecules, for which four symmetry distinct isomers exist, on NaCl(100) was studied by scanning tunneling microscopy. This nonthermal diffusion induced by inelastic excitations is found to be qualitatively different for all four symmetry distinct isomers, demonstrating that symmetry governs the surface potential landscape.
The link between formal education and national identities is widely acknowledged. Empirical research on national and supranational identities of teachers, however, is still relatively rare. Whilst a number of studies consider the special population of teachers, these contributions do not consistently focus on national and supranational identities. Based on a case study of 72 trainee teachers from Baden-Wü rttemberg (Germany), the present paper looks at the reconcilability of national and European identities and explores notions of the European Union in terms of cultural and geographical inclusiveness. Findings on the case study level are considered in their own right, but also compared to findings on the regional, national and European level, using relevant Eurobarometer survey data. The article shows that high levels of attachment to nation and high levels of attachment to Europe do not have to be mutually exclusive. It also demonstrates that, for most trainee teachers, the European Union constitutes a culturally and geographically inclusive institution that is supposed to stand for cultural diversity, peace, freedom and respect of human rights. Through comparisons that go beyond the case study level, the paper recognises the importance of regional and national contexts. Nonetheless, it argues that some of its findings are likely to be relevant for studies of national and European identities across different European societies.
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