Related Experiment Video
Updated: Jul 4, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
9.6K
Quantum interference in superposed lattices
Yejun Feng1, Yishu Wang2,3, T F Rosenbaum4
1Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan.
Summary
Shubnikov-de Haas oscillations in chromium reveal unique quantum interference effects. These findings illuminate the material
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- Shubnikov-de Haas (SdH) oscillations are crucial for understanding quantum transport phenomena in solids.
- These oscillations provide insights into mesoscopic properties and material structure, especially under magnetic fields.
- Previous studies focused on materials with simpler lattice structures and ground states.
Purpose of the Study:
- To investigate the nature of quantum transport in elemental chromium, a material with a complex spin-density-wave ground state and incommensurately superposed lattices.
- To analyze the phase relationships of Shubnikov-de Haas oscillations in chromium under varying magnetic fields.
- To elucidate the origin of observed phase shifts in low-frequency SdH oscillations.
Main Methods:
- Experimental measurements of Shubnikov-de Haas oscillations in elemental chromium at low temperatures and under magnetic fields.
- Analysis of oscillation phases in different crystallographic directions ([Formula: see text] and [Formula: see text]).
- Theoretical modeling to explain the observed quantum interference effects and phase shifts.
Main Results:
- Observed low-frequency Shubnikov-de Haas oscillations in chromium exhibiting opposite phases between [Formula: see text] and [Formula: see text] directions.
- This phase behavior contrasts with typical cyclotron orbits that show identical phases.
- The study attributes these unique oscillations to quantum interference effects from incommensurate orbits within chromium's superposed lattices.
Conclusions:
- The observed [Formula: see text]-phase shift in low-frequency SdH oscillations is explained by the reconnection of anisotropic joint open and closed orbits.
- These findings highlight the influence of complex lattice structures and spin-density-wave states on quantum transport.
- The study advances the understanding of quantum and topological phenomena in complex metallic systems.
Related Concept Videos
01:07Interference and Superposition of Waves
5.2K
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
5.2K
02:32The de Broglie Wavelength
25.9K
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...
25.9K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K
03:06The Pauli Exclusion Principle
37.3K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
37.3K
01:15Coulomb's Law and The Principle of Superposition
8.9K
Coulomb's Law describes the force experienced by two point charges under each other's presence. But what if there are more than two charges? For example, if there is a third charge, does it experience a force that is a simple combination of the individual forces due to the first two charges? Can it be described mathematically?
The Principle of Superposition answers the question. Yes, Coulomb's Law applies to each pair of charges, and the net force on each charge is the vector sum of...
The Principle of Superposition answers the question. Yes, Coulomb's Law applies to each pair of charges, and the net force on each charge is the vector sum of...
8.9K
01:25Atomic Absorption Spectroscopy: Interference
765
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,...
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,...
765