Related Experiment Video
Updated: Aug 9, 2026

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7−δ/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates
Published on: April 12, 2019
Magnetism, spin-orbit coupling, and superconducting pairing in UGe2
1Department of Physics, University of California, Davis, California 95616, USA.
Correlation effects beyond local density approximation (LDA) are crucial for understanding the magnetic properties of the superconducting itinerant ferromagnet UGe2. The LDA+U approach accurately models its magnetic moment and anisotropy, supporting p-wave triplet pairing.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Magnetism
Background:
- Superconducting itinerant ferromagnets like UGe2 present complex magnetic and electronic properties.
- Mean-field theories often fall short in consistently explaining these phenomena.
Purpose of the Study:
- To elucidate the magnetic properties and electronic structure of UGe2.
- To investigate the role of electron correlation effects beyond the local density approximation (LDA).
Main Methods:
- Utilizing the "LDA+U" (local density approximation plus Hubbard U) approach.
- Analyzing the electronic structure and Fermi surface characteristics.
Main Results:
- The LDA+U method successfully reproduces the observed magnetic moment and magnetocrystalline anisotropy of UGe2.
- The largest Fermi surface sheet is dominated by spin-majority states with m(l)=0 orbital projection.
- A quasi-two-dimensional Fermi surface geometry was identified.
Conclusions:
- Correlation effects are essential for a consistent description of UGe2's magnetic and electronic properties.
- The findings suggest a simplified pairing mechanism in UGe2 compared to other strongly spin-orbit coupled materials.
- The results support the hypothesis of magnetically mediated p-wave triplet pairing in UGe2.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
04:51Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
Related Concept Videos
Valence Bond Theory
Valence Bond Theory
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Spin–Spin Coupling: One-Bond Coupling
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Ferromagnetism