*SPECIAL COLLOQUIUM* Hot tips for thermal nanophysics

Event Dates: 

Monday, April 16, 2018 - 4:00pm

CTQM Seminar Type: 

  • Related Seminar Series

Speaker Name(s): 

Fabian Menges

Speaker Affiliation(s): 

University of Colorado

Abstract, Event Details: 

Thermal energy transfer and dissipation processes can influence the physical properties of matter, control the kinetics of chemical reactions, and trigger bio-molecular mechanisms in living organisms. One of the key challenges of physical sciences is therefore to understand how thermal phenomena arise and change on small scales. In this talk, I will present experimental routes to characterize local dissipation and thermal transport processes based on scanning probe microscopy and micro-electromechanical systems (MEMS) with integrated temperature sensors. Using several examples, I will first illustrate how scanning probe thermometry enables the real-space imaging of local Joule and Peltier effects in nanoscale devices down to 10 nm spatial and 10s of pico-Watt heat flux resolution [1,2]. Secondly, I will discuss thermal transport across nanoscale contacts and self-assembled alkane monolayers, ultimately demonstrating the validity of fundamental charge and heat transfer relations down to the atomic scale [3]. Finally, I will provide an outlook on the future development of time-resolved thermal scanning probe microscopy and its unique potential to unravel local thermo-physical processes in quantum materials and molecular systems.
[1] F. Menges et al., Temperature mapping of operating nanoscale devices by scanning probe thermometry, Nature Communications 7(10874), 2016.
[2] F. Menges et al., Nanoscale thermometry by scanning thermal microscopy, Review of Scientific Instruments (87) 7, 074902, 2016.
[3] N. Mosso et al., Heat transport through atomic contacts, Nature Nanotechnology 12, 430-433, 2017.