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 Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

4.6K
Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
4.6K
Contact Angle01:13

Contact Angle

27.7K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
27.7K
Reflection of Waves01:07

Reflection of Waves

4.7K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.7K
Impact01:30

Impact

553
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
553
Perpendicular-Axis Theorem01:16

Perpendicular-Axis Theorem

4.7K
The perpendicular-axis theorem states that the moment of inertia of a planar object about an axis perpendicular to its plane is equal to the sum of the moments of inertia about two mutually perpendicular concurrent axes lying in the plane of the body.
Consider a circular disc of mass M and radius R lying along an x-y plane. The origin lies at the center of the disc, and the z-axis is perpendicular to the disc's plane. All three axes coincide at the disc's center. The moment of inertia of this...
4.7K
X-ray Crystallography02:18

X-ray Crystallography

26.5K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
26.5K

You might also read

Related Articles

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

Sort by
Same author

An integrated solar battery based on a charge storing 2D carbon nitride.

Energy & environmental science·2023
Same author

Femtosecond pulse laser cleaning of spray paint from heritage stone surfaces.

Optics express·2022
Same author

Mental health over nine months during the SARS-CoV2 pandemic: Representative cross-sectional survey in twelve waves between April and December 2020 in Austria.

Journal of affective disorders·2021
Same author

Electric-Field Control of a Single-Atom Polar Bond.

Physical review letters·2021
Same author

Indoor pet allergen exposures modify the effects of chemical air pollutants on respiratory symptoms.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2021
Same author

Distinct Kondo Screening Behaviors in Heavy Fermion Filled Skutterudites with 4f^{1} and 4f^{2} Configurations.

Physical review letters·2021

Related Experiment Video

Updated: Mar 5, 2026

Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants
08:06

Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants

Published on: October 28, 2022

1.5K

Impact of Atomic-Scale Contact Geometry on Andreev Reflection.

J Brand1, P Ribeiro2, N Néel1

  • 1Institut für Physik, Technische Universität Ilmenau, D-98693 Ilmenau, Germany.

Physical Review Letters
|March 25, 2017
PubMed
Summary

Charge transport in superconductor junctions reveals Andreev reflection signatures. Molecular orientation and tip structure influence conductance, aligning with theoretical models.

More Related Videos

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
08:58

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid

Published on: December 2, 2022

3.8K
Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

8.1K

Related Experiment Videos

Last Updated: Mar 5, 2026

Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants
08:06

Addressing Practical Issues in Atomic Force Microscopy-Based Micro-Indentation on Human Articular Cartilage Explants

Published on: October 28, 2022

1.5K
Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
08:58

Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid

Published on: December 2, 2022

3.8K
Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

8.1K

Area of Science:

  • Condensed matter physics
  • Surface science
  • Molecular electronics

Background:

  • Investigating charge transport mechanisms in nanoscale junctions is crucial for developing novel electronic devices.
  • Superconductors exhibit unique quantum phenomena, such as the Bardeen-Cooper-Schrieffer energy gap, which can be probed using scanning tunneling microscopy.
  • Fullerene molecules (C60) are promising building blocks for molecular electronics due to their unique electronic properties.

Purpose of the Study:

  • To examine charge transport in junctions formed by a normal-metal tip, a superconductor, and adsorbed C60 molecules.
  • To understand the evolution of the superconducting energy gap and its relation to Andreev reflection.
  • To investigate the influence of tip-surface atomic structure and molecular orientation on transport properties.

Main Methods:

  • Utilizing a low-temperature scanning tunneling microscope (STM) to probe junctions.
  • Analyzing the spectroscopic signatures of charge transport, focusing on the zero-bias peak.
  • Performing transport calculations to model the observed phenomena and compare with experimental data.

Main Results:

  • Observed a gradual evolution of the Bardeen-Cooper-Schrieffer energy gap into a zero-bias peak with decreasing electrode separation.
  • Assigned the zero-bias peak to the spectroscopic signature of Andreev reflection.
  • Demonstrated that conductance is dependent on the tip's atomic termination and the C60 molecule's adsorption orientation.
  • Found good agreement between experimental data and the Blonder-Tinkham-Klapwijk model, attributed to finite temperature and strong molecule-electrode hybridization.

Conclusions:

  • Andreev reflection provides a spectroscopic signature in superconductor-molecule junctions.
  • Atomic and molecular structure critically dictates charge transport properties.
  • The Blonder-Tinkham-Klapwijk model, even for macroscopic contacts, can effectively describe nanoscale transport under specific conditions.