SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 77: Scanning Probe Techniques: Method Development II
O 77.3: Vortrag
Donnerstag, 30. März 2023, 11:00–11:15, REC C 213
Development of a closed-cycle dilution refrigerator scanning tunneling microscope — •Mate Stark1, Daria Sostina2, Wantong Huang1, Paul Greule1, Christoph Sürgers1, Philip Willke1, and Wolfgang Wernsdorfer1 — 1Physikalisches Institut (PHI), Karlsruhe Institute of Technology, Karlsruhe, Germany — 2Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology, Karlsruhe, Germany
Throughout the last decades, scanning probe techniques, such as scanning tunneling microscopy (STM), have been successfully paving the way to discover and understand physics on the atomic scale. However, recent developments in studying single atoms’ electronic and magnetic properties have shown experimental limitations. For instance, the combination of electron spin resonance (ESR) with STM has shown short spin relaxation time T1 and phase coherence time T2 on single atoms, among others limited by thermally excited electrons [Willke et al.,
Sci. Adv. 4(2), 1543 (2018)].
Here, we present the implementation of a compact closed-cycle dilution refrigerator (DR) reaching milli-Kelvin temperatures, which we combine with a commercial STM under ultra-high vacuum (UHV) conditions. This combination enables a fast cool down, shows a low vibrational level, and requires a minimum of everyday maintenance. We demonstrate the functionality of the DR-STM by performing ESR measurements on individual magnetic molecules.