Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Proximity effect and multiple Andreev reflections in gold atomic contacts.

E Scheer1, W Belzig, Y Naveh

  • 1Physikalisches Institut, Universität Karlsruhe, Germany.

Physical Review Letters
|February 15, 2001
PubMed
Summary

We studied electronic transport in gold point contacts with aluminum leads. The smallest, single-atom gold contacts exhibit one conduction channel with tunable transmission, crucial for understanding quantum transport.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Vaginal radical hysterectomy in early stage cervical cancer.

Gynecologic oncology reports·2025
Same author

Benchmarking the Readout of a Superconducting Qubit for Repeated Measurements.

Physical review letters·2025
Same author

Microwave Fluorescence Detection of Spin Echoes.

Physical review letters·2023
Same author

Single-electron spin resonance detection by microwave photon counting.

Nature·2023
Same author

Real-time quantum error correction beyond break-even.

Nature·2023
Same author

Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs.

Physical review letters·2023

Area of Science:

  • Condensed matter physics
  • Quantum electronics
  • Nanoscale transport phenomena

Background:

  • Proximity effect in superconductors influences electronic properties.
  • Understanding quasiparticle density of states is key to electronic transport.
  • Point contacts offer a unique regime for studying quantum transport.

Purpose of the Study:

  • Investigate electronic transport properties of gold point contacts.
  • Measure modifications in quasiparticle density of states due to proximity effect.
  • Extend existing theories to model transport in nanoscale contacts.

Main Methods:

  • Utilized tunnel spectroscopy to probe quasiparticle density of states.
  • Developed a theoretical model extending multiple Andreev reflections.

Related Experiment Videos

  • Analyzed conduction channels and their transmission coefficients.

    • Main Results:

    • Observed modifications in quasiparticle density of states at the contact.
    • Smallest contacts (single gold atom) showed a single conduction channel.
    • Transmission coefficient (T) for this channel was found to be variable (0.1 to 1).

    Conclusions:

    • Single-atom contacts are fundamental units of transport in these systems.
    • The proximity effect significantly impacts transport properties at the nanoscale.
    • The developed theory accurately describes transport through such modified contacts.