Measurement of current-induced local heating in a single molecule junction.
We have studied the current-induced local heating effects in single molecules covalently bound to two electrodes by measuring the force required to break the molecule-electrode bonds under various conditions. The breakdown process is thermally activated, which is used to extract the effective temperature of the molecular junction as a function of applied bias voltage. We have also performed first-principles calculations of both local heating and current-induced force effects, and the results are in good agreement with the experimental findings.
Huang
Zhifeng
Z
Department of Electrical Engineering & The Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287, USA.
Xu
Bingqian
B
Chen
Yuchang
Y
Di Ventra
Massimiliano
M
Tao
Nongjian
N
D017097:Electric Impedance; D004563:Electrochemistry / Q000379:methods*; D004574:Electromagnetic Fields; D004579:Electron Transport; D006358:Hot Temperature; D015336:Molecular Probe Techniques; D049329:Nanostructures / Q000032:analysis* / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D009795:Octanes / Q000032:analysis* / Q000737:chemistry*; D013314:Stress, Mechanical; D013696:Temperature
D009795:Octanes