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Published on: June 3, 2015
Quantum Stochastic Rectification in a Single Molecule
Jiang Yao1, Siyu Chen1, Wenlu Shi1
1University of California, Department of Physics and Astronomy, Irvine, California 92697-4575, USA.
None:
Quantum stochastic rectification arises from the dc response of a system subjected to both quantum noise and a small, periodic sinusoidal voltage modulation. In this Letter, we demonstrate quantum stochastic rectification by using inelastic electron tunneling spectroscopy with a scanning tunneling microscope to monitor the conformational switching of a single pyrrolidine molecule adsorbed on a Cu(001) surface. By applying quasistatic and nonequilibrium approximations, we elucidate the underlying dynamic response mechanisms. Additionally, we establish a quantitative relationship between the critical driving frequency in rectification measurements and the system's relaxation time, facilitating the measurement of rapid relaxation rates in single molecules.
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