Veranstaltungsdetails

18.5.2006, 15:30
Jungiusstr. 11, Hörsaal AP

SFB 668 - Seminar

Dr. Kelly Patton (Uni Hamburg):

Scanning Thermal Microscopy

The development of the scanning tunneling microscope (STM) led to a Nobel prize in 1986, since then it has had a tremendous impact in both the pure and applied sciences. The STM and related technologies, such as the atomic force microscope, probe the electronic properties of materials. In this talk I will propose a variation of an STM, which measures the vibrational (phonon) spectrum of a system. This leads to an expression for the thermal current between two weakly coupled bodies that is an exact analog of the well-known formula for the electronic tunneling current between two systems. The information extracted from such a thermal current as well as an application to DNA will be presented.