Evolving Devil's Staircase Magnetization from Tunable Charge Density Waves in Nonsymmorphic Dirac Semimetals

Ratnadwip Singha, Tyger H. Salters, Samuel M.L. Teicher, Shiming Lei, Jason F. Khoury, N. Phuan Ong, Leslie M. Schoop

Research output: Contribution to journalArticlepeer-review

Abstract

While several magnetic topological semimetals have been discovered in recent years, their band structures are far from ideal, often obscured by trivial bands at the Fermi energy. Square-net materials with clean, linearly dispersing bands show potential to circumvent this issue. CeSbTe, a square-net material, features multiple magnetic-field-controllable topological phases. Here, it is shown that in this material, even higher degrees of tunability can be achieved by changing the electron count at the square-net motif. Increased electron filling results in structural distortion and formation of charge density waves (CDWs). The modulation wave-vector evolves continuously leading to a region of multiple discrete CDWs and a corresponding complex “Devil's staircase” magnetic ground state. A series of fractionally quantized magnetization plateaus is observed, which implies direct coupling between CDW and a collective spin-excitation. It is further shown that the CDW creates a robust idealized nonsymmorphic Dirac semimetal, thus providing access to topological systems with rich magnetism.

Original languageEnglish (US)
Article number2103476
JournalAdvanced Materials
Volume33
Issue number41
DOIs
StatePublished - Oct 14 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • antiferromagnetic dirac semimetals
  • charge density waves
  • quantized magnetization plateaus
  • spin waves

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