Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Debye–Huckel–Onsager Conductance Equation

Debye–Huckel–Onsager Conductance Equation

The Debye-Hückel-Onsager equation is a cornerstone of physical chemistry, providing a method to determine the molar conductance (Λm) and molar conductance at infinite dilution (Λ°m) for uni-univalent electrolytes.Uni-univalent electrolytes are electrolytes that dissociate in solution to produce one cation with a +1 charge and one anion with a –1 charge per formula unit.This equation addresses two crucial phenomena: the asymmetry effect and the electrophoretic effect. According to this equation,...

The de Broglie Wavelength

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to the...

Molecular Orbital Theory I

Molecular Orbital Theory I

Overview of Molecular Orbital Theory

Atomic Absorption Spectroscopy: Interference

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...

Molecular Spectroscopy: Absorption and Emission

Molecular Spectroscopy: Absorption and Emission

Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.

You might also read

Related Articles

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

Sort by

Same author

Modelling magnetic anisotropy in molecular magnets.

Physical chemistry chemical physics : PCCP·2026

Same author

Corrigendum: Two-stage three-channel Kondo physics for an FePc molecule on the Au(1 1 1) surface (2018<i>J. Phys.: Condens. Matter</i><b>30</b>374003).

Journal of physics. Condensed matter : an Institute of Physics journal·2026

Same author

Strongly Correlated Electronic Structure of Some Graphene Nano Ribbons and Nano Flakes.

Journal of computational chemistry·2025

Same author

Singlet Polaron Theory of Low-Energy Optical Excitations in NiPS_{3}.

Physical review letters·2024

Same author

Quantum phase transitions in skewed ladder systems.

Physical chemistry chemical physics : PCCP·2023

Same author

Musculoskeletal abnormalities and a novel genomic variant in an adult patient with CHILD syndrome: a case report.

Clinical dysmorphology·2022

Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026

Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026

Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026

Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026

Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026

Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 14, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Quantum interference in coherent molecular conductance.

Julián Rincón¹, K Hallberg, A A Aligia

¹Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica and CONICET, 8400 Bariloche, Argentina.

Physical Review Letters

|April 7, 2010

Summary

This summary is machine-generated.

Quantum interference significantly impacts molecular conductance. Breaking molecular symmetry can abruptly increase conductance, offering potential for molecular switching applications.

More Related Videos

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Related Experiment Videos

Last Updated: Jun 14, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

Quantum transport phenomena
Molecular electronics
Condensed matter physics

Background:

Coherent electronic transport in molecules is sensitive to quantum interference effects.
Destructive quantum interference can reduce conductance in pi-conjugated annulene molecules.
Previous studies focused on interference effects at the Fermi energy.

Purpose of the Study:

Investigate quantum interference in annulene molecular conductance.
Analyze the impact of broken translational symmetry on conductance.
Explore potential for molecular conductance switching.

Main Methods:

Theoretical investigation of zero-bias, zero-temperature conductance.
Analysis of pi-conjugated annulene molecules coupled to leads.
Simulation of conductance under varying source-drain configurations and symmetry breaking.

Main Results:

Identified reduction in conductance due to destructive quantum interference for specific geometries and channels.
Observed an abrupt increase in conductance upon breaking translational symmetry.
Demonstrated a significantly larger response by analyzing symmetry breaking on main transmission channels compared to Fermi energy effects.

Conclusions:

Destructive quantum interference plays a key role in molecular conductance.
External perturbations breaking molecular symmetry can be used to control conductance.
This work opens possibilities for enhanced molecular conductance switching devices.