Related Experiment Video
Updated: Aug 5, 2025
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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
8.2K
Pressure-Induced Structural Phase Transition and Enhanced Interlayer Coupling in Two-Dimensional Ferromagnet CrSiTe3.
Xiaomei Pan1,2, Baojuan Xin3, Hong Zeng1,2
1Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
The Journal of Physical Chemistry Letters
|March 29, 2023
Summary
High pressure reveals the structural transition in chromium silicon telluride (CrSiTe3), a topological magnet. This clarifies pressure-induced physics and enhances its magnetic properties.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid-State Chemistry
Background:
- Two-dimensional van der Waals ferromagnetic semiconductor CrSiTe3 is an intrinsic topological magnet.
- Superconductivity and enhanced ferromagnetism observed in CrSiTe3 at high pressure, despite typically competing orders.
- The high-pressure structure of CrSiTe3 remains unclear, hindering understanding of pressure-induced phenomena.
Purpose of the Study:
- To clarify the high-pressure crystal structure of CrSiTe3.
- To understand the relationship between structural changes, ferromagnetism, and superconductivity under pressure.
- To explore novel pressure-induced physics in topological magnets.
Main Methods:
- Ultralow-frequency Raman spectroscopy under high pressure.
- First-principles calculations.
- Analysis of interlayer breathing modes and phase transitions.
Main Results:
- Observed the interlayer breathing mode at ~42.1 cm-1 in CrSiTe3 using ultralow-frequency Raman spectroscopy.
- Confirmed a pressure-induced phase transition from the R3̅ to the R3 phase.
- Theoretical calculations show enhanced Curie temperature with the phase transition.
Conclusions:
- High-pressure structural transition in CrSiTe3 clarified.
- Ultralow-frequency Raman spectroscopy is effective for probing 2D material structures under pressure.
- The findings provide insights into modulating magnetic properties and interlayer coupling in topological magnets.
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