LOW-TEMPERATURE SCANNING-TUNNELING-MICROSCOPY

The novel technique of low-temperature scanning tunneling microscopy i s used to study conventional and high-T(c) superconductors (spatial id entification and distribution of the superconducting gap, vortex movem ent, etc.), but also custom-designed materials which are unstable at r oom temperature, e.g. xenon layers and size-selected clusters, or spec ies whose rotational or vibrational movements have to be frozen in to achieve atomic resolution. We present the specific design and advantag es of our low-temperature ultra-high vacuum scanning tunneling microsc ope along with recent results on the internal structure of C60 fullere ne molecules and their photon emitting properties.