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Evolving Devil's Staircase Magnetization from Tunable Charge Density Waves in Nonsymmorphic Dirac Semimetals
Ratnadwip Singha1, Tyger H Salters1, Samuel M L Teicher2
1Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA.
Advanced Materials (Deerfield Beach, Fla.)
|August 26, 2021
Summary
Researchers discovered that altering electron filling in CeSbTe, a magnetic topological semimetal, creates tunable charge density waves (CDWs) and novel magnetic states. This leads to a robust Dirac semimetal with rich magnetism.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Magnetic topological semimetals often have complex band structures.
- Square-net materials offer cleaner, linearly dispersing bands for topological applications.
Purpose of the Study:
- To investigate the tunability of topological phases in the square-net material CeSbTe.
- To explore the impact of electron filling on the material's electronic and magnetic properties.
Main Methods:
- Experimental synthesis and characterization of CeSbTe.
- Investigating structural distortions and charge density wave (CDW) formation.
- Measuring magnetic properties and magnetization plateaus.
Main Results:
- Electron filling changes induce structural distortions and CDW formation.
- A complex "Devil's staircase" magnetic ground state emerges with continuous wave-vector evolution.
- Fractionally quantized magnetization plateaus indicate coupling between CDW and spin excitations.
Conclusions:
- CeSbTe exhibits tunable topological phases driven by electron filling and CDW formation.
- The CDW stabilizes an idealized nonsymmorphic Dirac semimetal.
- This work provides access to topological systems with intricate magnetism.
Keywords:
antiferromagnetic dirac semimetalscharge density wavesquantized magnetization plateausspin wavesMore Related Videos
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