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Updated: Jun 12, 2025
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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
9.9K
Real Topological Phonons in 3D Carbon Allotropes
Xiaotian Wang1,2, Jingbo Bai1, Jianhua Wang3
1School of Physical Science and Technology, Southwest University, Chongqing, 400715, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 20, 2024
Summary
Researchers explored 3D carbon allotropes for topological phononic states. They identified numerous candidates for phononic real Chern insulating, nodal line, Dirac point, and triple-point pair states, expanding material discovery.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Physics
Background:
- Significant focus on real topological systems with space-time inversion symmetry and no spin-orbit coupling.
- Theoretical classification of real topology is established, but experimental realization in 3D topological phononic states is limited.
Purpose of the Study:
- To investigate the material realization of 3D topological phononic states.
- To identify carbon allotropes hosting various phononic real topological states.
Main Methods:
- High-throughput computing was employed to analyze phonon spectrums of 3D carbon allotropes.
- The Samara Carbon Allotrope Database (SACADA) was utilized for material screening.
Main Results:
- Out of 1661 carbon allotropes, 79 candidates exhibit phononic real Chern insulating (PRCI) states.
- 2 candidates show phononic real nodal line (PRNL) states, 12 show phononic real Dirac point (PRDP) states, and 10 show phononic real triple-point pair (PRTPP) states.
- Specific examples of PRCI, PRNL, PRTPP, and PRDP states were identified, along with exploration of second-order phononic hinge modes.
Conclusions:
- This study advances the understanding of 3D topological phonons.
- It expands the range of material candidates exhibiting phononic hinge modes and phononic real topology.
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