Related Experiment Video
Updated: Jul 2, 2026
08:00
Correlative Confocal and 3D Electron Microscopy of a Specific Sensory Cell
Published on: July 19, 2015
Fermi-surface reconstruction in CeRh1-xCoxIn5.
Swee K Goh1, Johnpierre Paglione, Mike Sutherland
1Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, United Kingdom.
Physical Review Letters
|September 4, 2008
Summary
The Fermi surface in CeRh(1-x)CoxIn5 undergoes a topological change at x=0.4, not the quantum critical point. This indicates magnetic order alteration and superconductivity emergence influence electronic structure.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- The interplay between magnetism, superconductivity, and electronic structure is crucial in heavy fermion compounds.
- Ce-based intermetallic compounds like CeRhIn5 and its alloys exhibit complex phase diagrams with magnetic ordering and superconductivity.
Purpose of the Study:
- To investigate the evolution of the Fermi surface topology in CeRh(1-x)CoxIn5 as a function of cobalt concentration (x).
- To determine the relationship between Fermi surface reconstruction, magnetic ordering, and superconductivity in this system.
Main Methods:
- Utilizing the de Haas-van Alphen (dHvA) effect to probe the Fermi surface.
- Analyzing the angular dependence of quantum oscillation frequencies to map Fermi surface sheets.
Main Results:
- An f-electron-derived Fermi surface sheet shows an abrupt topological change with increasing cobalt concentration.
- This reconstruction occurs at x ≈ 0.4, below the quantum critical concentration (x(c)) where antiferromagnetism is suppressed.
- Superconductivity emerges concurrently with the topological change at x ≈ 0.4, coinciding with a shift in magnetic order character.
Conclusions:
- Fermi surface reconstruction in CeRh(1-x)CoxIn5 is driven by changes in magnetic order and the emergence of superconductivity, rather than solely by the suppression of antiferromagnetism.
- The cyclotron effective mass of the affected Fermi surface sheet does not diverge, suggesting localized critical behavior.
Related Concept Videos
01:28Quadric Surfaces
Quadric surfaces are three-dimensional surfaces characterized by second-degree equations in the variables x, y, and z. These surfaces are smooth and continuous, and specific combinations of squared and linear terms define their shapes. The main types of quadric surfaces include ellipsoids, cones, paraboloids, and hyperboloids. Each type exhibits distinct geometric features depending on how the variables are arranged and related within the equation.Ellipsoids are closed surfaces formed when all...
01:30Oriented Surfaces
A surface is called orientable if a consistent choice of unit normal vector can be made at every point on the surface. A thin soap film stretched across a wire loop provides a familiar example. The film separates the air on one side from the air on the other, so one side can be selected as positive and the opposite side as negative. Once this choice is made, a unit normal vector can be assigned smoothly across the entire surface.At each point on the soap film, a unit normal vector points...
01:22Surface Area Calculations
Surface area calculations for a graph z = f(x, y) are fundamental in engineering applications involving curved structures such as satellite dishes. A parabolic dish reflects communication signals efficiently, but engineers must determine its exact curved surface area to estimate coating materials, fabrication costs, and structural requirements. Since the rim of the dish forms a circular boundary, the surface area is calculated over a circular domain in the xy-plane.Parametric Representation of...
01:28Surface Integrals
A curved roof has a surface area that is generally larger than its flat projection. To estimate the cost of painting it, the curved surface area must first be calculated. If the roof is represented parametrically by a vector-valued function r(u,v), then each point in a parameter domain D corresponds to a point on the surface S. This connection allows the curved surface to be studied through a two-dimensional parameter region.The parameter domain D is divided into many small rectangles. A...
01:07Electron Microscope Tomography and Single-particle Reconstruction
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
01:02Long-patch Base Excision Repair
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are: