title: Detection of heating in current-carrying molecular junctions by Raman scattering.
abstract: As the scaling of electronic components continues, local heating will have an increasing influence on the stability and performance of nanoscale electronic devices. In particular, the low heat capacity of molecular junctions means that it will be essential to understand local heating and heat conduction in these junctions. Here we report a method for directly monitoring the effective temperature of current-carrying junctions with surface enhanced Raman spectroscopy (SERS) that involves measuring both the Stokes and anti-Stokes components of the Raman scattering. All the Raman-active modes in our system show similar heating as a function of bias at room temperature, which suggests fast vibrational relaxation processes inside the junctions. These results demonstrate the power of direct spectroscopic probing of heating and cooling processes in nanostructures.
authors.affiliation: School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel.
authors.forename: Zvi
authors.initials: Z
authors.lastname: Ioffe
authors.forename: Tamar
authors.initials: T
authors.lastname: Shamai
authors.forename: Ayelet
authors.initials: A
authors.lastname: Ophir
authors.forename: Gilad
authors.initials: G
authors.lastname: Noy
authors.forename: Ilan
authors.initials: I
authors.lastname: Yutsis
authors.forename: Kobi
authors.initials: K
authors.lastname: Kfir
authors.forename: Ori
authors.initials: O
authors.lastname: Cheshnovsky
authors.forename: Yoram
authors.initials: Y
authors.lastname: Selzer
mesh_terms: D000465:Algorithms; D008956:Models, Chemical; D049329:Nanostructures; D036103:Nanotechnology / Q000379:methods*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013696:Temperature; D013816:Thermodynamics