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Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
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  3. Interlayer Charge-density-wave Vector Phase Induced Structural Chirality.
  1. Home
  3. Interlayer Charge-density-wave Vector Phase Induced Structural Chirality.

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Interlayer Charge-Density-Wave Vector Phase Induced Structural Chirality.

Sen Shao1, Wei-Chi Chiu2,3, Tao Hou1

  • 1Nanyang Technological University, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, 21 Nanyang Link, 637371, Singapore.

Physical Review Letters
|May 1, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Interlayer phases in charge density waves (CDWs) drive structural chirality in layered materials. This discovery aids in finding and designing new chiral CDW materials with unique quantum properties.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Chiral charge density waves (CDWs) exhibit exotic quantum properties.
  • The origin of structural chirality in correlated charge order is not well understood.

Purpose of the Study:

  • To elucidate the microscopic origin of structural chirality in layered CDW materials.
  • To identify new materials exhibiting chiral CDW order.

Main Methods:

  • First-principles calculations incorporating interlayer phases of CDW vectors.
  • Analysis of electronic and optical properties of predicted chiral structures.

Main Results:

  • Identified interlayer phases as key drivers of chiral structural displacements.
  • Successfully reproduced chiral CDW structures for AV₃Sb₅ and 1T-TiSe₂.
  • Predicted 1T-NbSe₂ as a candidate for chiral CDW order.

    • Conclusions:

    • Interlayer CDW phases are crucial for emergent chirality.
    • Electron filling can manipulate chiral CDW states.
    • Opens new pathways for chiral CDW material discovery and engineering.