Complementary to scattering techniques scanning tunnelling microscopy provides atomic-scale
real space information about a material's electronic state of matter. State-of-the-art designs
of a scanning tunnelling microscope (STM) allow measurements at millikelvin temperatures with
unprecedented energy resolution. Therefore this instrument excels in probing the
superconducting state at low temperatures and especially its local quasiparticle excitations as
well as bosonic degrees of freedom.
