Related Experiment Video
Updated: May 29, 2025
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.5K
Three-dimensional mapping of the altermagnetic spin splitting in CrSb
Guowei Yang1, Zhanghuan Li2, Sai Yang3
1Center for Correlated Matter and School of Physics, Zhejiang University, Hangzhou, China.
Nature Communications
|February 7, 2025
Summary
Researchers discovered a large altermagnetic splitting in CrSb, a material with potential for spintronics. This finding, enabled by 3D k-space mapping, opens doors for new emergent phenomena and advanced electronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Altermagnetism, a collinear magnetic state with momentum-dependent spin splitting, is gaining attention for spintronic applications.
- Identifying materials with significant altermagnetic splitting near the Fermi level is crucial but challenging.
- Three-dimensional (3D) k-space mapping is essential for characterizing altermagnetic properties.
Purpose of the Study:
- To investigate and quantify the altermagnetic splitting in Chromium Antimonide (CrSb).
- To explore the potential of CrSb for spintronic applications and emergent phenomena.
- To understand the underlying mechanism responsible for the observed altermagnetic splitting.
Main Methods:
- Synchrotron-based angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES.
- Systematic three-dimensional (3D) k-space mapping.
- Theoretical modeling using tight-binding calculations.
Main Results:
- A substantial altermagnetic splitting of up to ~1.0 eV was observed near the Fermi level in CrSb.
- The bulk-type g-wave altermagnetism and its associated nodal planes were confirmed through 3D k-space mapping.
- Spin-resolved ARPES verified the spin polarization of the split bands.
- Tight-binding analysis attributed the large splitting to strong third-nearest-neighbor hopping.
Conclusions:
- CrSb exhibits significant altermagnetic splitting, making it a promising material for altermagnetism research.
- The material's high Néel temperature (TN up to 705 K) and metallic nature further enhance its potential for spintronic devices.
- This discovery paves the way for exploring novel emergent phenomena and developing next-generation spintronic applications.
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
8.0K
09:00Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
9.8K
Related Concept Videos
03:02Colors and Magnetism
11.5K
Color in Coordination Complexes
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...
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...
11.5K
01:03Atomic Nuclei: Nuclear Spin State Overview
848
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of...
848
01:08Spin–Spin Coupling Constant: Overview
863
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
863
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
1.1K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.1K
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
917
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
917
01:13¹H NMR: Complex Splitting
1.2K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.2K