Application: Mechanically controlled break junction (MCBJ) analysis with inelastic electron tunneling spectroscopy (IETS).

Objectives: Identification of the presence of a single molecule in the nano-gap of the mechanically controllable break junction (MCBJ) and characterization by means of inelastic electron tunneling spectroscopy (IETS). The measurement consists of simultaneous, DC transport (I-V), conductance dI/dV (first harmonic), and first derivative of the conductance d2I/dV2 measurements (second harmonic).
Benefits: Single box for multi-frequency measurements of the DC, first harmonic, and second harmonic, ramp and modulation signal generation, extensive analysis tools included, control of the external current pre-amplifier included in the user interface.
Relevant products: HF2LI, HF2LI-MF, HF2TA

HF2LI setup for IETS of a MCBJ

Key Features of the HF2LI Lock-in Amplifier for this Application

  • 3 demodulators per signal input
  • 1 µHz to 50 MHz frequency range
  • 2 independent measurement units, 2 high-frequency generators
  • 2 auxiliary inputs, 4 auxiliary outputs, 32 digital I/O (DIO)
  • integrated analog signal added for ramp + modulation
  • single cable connection for control and power to external pre-amplifier HF2TA
  • Integrated frequency response analyzer, FFT spectrum analyzer, and oscilloscope

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