Polymorphic Spin, Charge, and Lattice Waves in Vanadium Ditelluride

Dongyeun Won, Do Hoon Kiem, Hwanbeom Cho, Dohyun Kim, Younghak Kim, Min Yong Jeong, Changwon Seo, Jeongyong Kim, Je Geun Park, Myung Joon Han, Heejun Yang, Suyeon Cho

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Lattice distortion, spin interaction, and dimensional crossover in transition metal dichalcogenides (TMDs) have led to intriguing quantum phases such as charge density waves (CDWs) and 2D magnetism. However, the combined effect of many factors in TMDs, such as spin–orbit, electron–phonon, and electron–electron interactions, stabilizes a single quantum phase at a given temperature and pressure, which restricts original device operations with various quantum phases. Here, nontrivial polymorphic quantum states, CDW phases, are reported in vanadium ditelluride (VTe2) at room temperature, which is unique among various CDW systems; the doping concentration determines the formation of either of the two CDW phases in VTe2 at ambient conditions. The two CDW polymorphs show different antiferromagnetic spin orderings in which the vanadium atoms create two different stripe-patterned spin waves. First-principles calculations demonstrate that the magnetic ordering is critically coupled with the corresponding CDW in VTe2, which suggests a rich phase diagram with polymorphic spin, charge, and lattice waves all coexisting in a solid for new conceptual quantum state-switching device applications.

Original languageEnglish
Article number1906578
JournalAdvanced Materials
Volume32
Issue number11
DOIs
StatePublished - 1 Mar 2020

Keywords

  • charge density waves
  • polymorphism
  • transition metal dichalcogenides
  • vanadium ditelluride

Fingerprint

Dive into the research topics of 'Polymorphic Spin, Charge, and Lattice Waves in Vanadium Ditelluride'. Together they form a unique fingerprint.

Cite this