Related Experiment Video
Updated: Jul 3, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Distortion and charge density wave in the Ga square net coupled to the site occupancy wave in YCo0.88Ga3Ge
Danielle L Gray1, Melanie C Francisco, Mercouri G Kanatzidis
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
Abstract:
YCo 0.88Ga 3Ge has an incommensurately modulated structure that was solved with (3 + 1)D superspace techniques. YCo 0.88Ga 3Ge crystallizes in the orthorhombic superspace group Immm(alpha00)00 s with unit cell constants of a = 4.1639(4), b = 4.1639(4), c = 23.541(2) A and a modulation vector of q = 0.3200(4) a* at 293 K. The incommensurate modulation, which creates a very large supercell ( approximately 25 fold), arises from a charge density wave (CDW) in the square net of Ga atoms that is coupled with a site occupancy wave (SOW) of Co atoms. The distorted Ga net features polygallide ribbons, chains, as well as single atoms. Temperature dependent crystallographic studies of the structure from 100-500 K indicate that the CDW is "locked in". Electrical conductivity and thermopower measurements in the temperature range of 300-500 K show that YCo 0.88Ga 3Ge is a poor metal.
Related Concept Videos
Debye–Huckel–Onsager Conductance Equation
Trends in Lattice Energy: Ion Size and Charge
Valence Bond Theory
Continuous Charge Distributions
The electric charge can also be subjected to an analogical...
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Energy Associated With a Charge Distribution

