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Hidden Charge Order and Multiple Electronic Instabilities in EuTe4
Kebin Xiao1,2, Wen-Han Dong1,2, Xintong Wang1,2
1State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
Nano Letters
|June 14, 2024
Summary
EuTe4 reveals two charge orders: a spindle-shaped pattern and a stripe-like pattern. The spindle-shaped charge density wave (CDW) is a hidden order, emerging at low temperatures and offering insights into exotic quantum phases.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Europium telluride (EuTe4) is known for its charge density wave (CDW) and thermal hysteresis.
- Understanding complex electronic states in rare-earth compounds is crucial for novel quantum phenomena.
Purpose of the Study:
- To comprehensively investigate the charge density wave (CDW) states in EuTe4.
- To identify and characterize novel charge order patterns and their origins.
Main Methods:
- Low-temperature scanning tunneling microscopy (STM) was employed to probe the surface electronic states.
- First-principles calculations were performed to understand the underlying electronic instabilities.
Main Results:
- Two distinct charge orders were observed at 4 K: a spindle-shaped pattern and a stripe-like pattern.
- The spindle-shaped CDW, an exotic charge order, is off-axis and becomes visible only at low temperatures, indicating a hidden state.
- First-principles calculations confirmed that the spindle-shaped CDW arises from a secondary transition building upon the stripe-like CDW phase.
Conclusions:
- The competition and cooperation between multiple charge orders in EuTe4 can lead to the emergence of exotic quantum phases.
- This study reveals a new type of charge order and provides a theoretical framework for its existence, deepening the understanding of complex electronic states in materials.
Keywords:
charge orderelectronic instabilityfirst-principles calculationscanning tunneling microscopyMore Related Videos
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