title: Fast sensitive amplifier for two-probe conductance measurements in single molecule break junctions.
abstract: We demonstrate an amplifier based on the Wheatstone bridge designed specifically for use in single molecule break junctions. This amplifier exhibits superior performance due to its large bandwidth, flat frequency response, and high sensitivity. The amplifier is capable of measuring conductance values from 102to 10-6G0(G0= 2e2/h), while maintaining a bandwidth in excess of 20 kHz, and shows remarkable resolution in the molecular conductance regime of 10-2to 10-5G0.
authors.affiliation: Department of Chemistry and Biochemistry, The University of Arizona, 1306 E. University Blvd., Tucson, Arizona 85721, USA.
authors.forename: Tyler K
authors.initials: TK
authors.lastname: Johnson
authors.affiliation: Department of Chemistry and Biochemistry, The University of Arizona, 1306 E. University Blvd., Tucson, Arizona 85721, USA.
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Ivie
authors.affiliation: Department of Chemical and Environmental Engineering, The University of Arizona, 1133 James E. Rogers Way, Tucson, Arizona 85721, USA.
authors.forename: Jason
authors.initials: J
authors.lastname: Jaruvang
authors.affiliation: Department of Chemistry and Biochemistry, The University of Arizona, 1306 E. University Blvd., Tucson, Arizona 85721, USA.
authors.forename: Oliver L A
authors.initials: OL
authors.lastname: Monti