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Band-selective Holstein polaron in Luttinger liquid material A0.3MoO3 (A = K, Rb)
1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China.
Nature Communications
|October 27, 2021
Summary
Molybdenum blue bronze exhibits Luttinger liquid behavior and a charge-density-wave transition. Strong electron-phonon coupling, forming Holstein polarons, is key to its electronic properties and phase transition.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Quasi-one-dimensional systems display unique phenomena like Luttinger liquid behavior and charge-density waves.
- Molybdenum blue bronzes (A0.3MoO3) are canonical quasi-one-dimensional charge-density-wave materials with debated electronic properties.
Purpose of the Study:
- Investigate the electronic properties of molybdenum blue bronze (A0.3MoO3).
- Clarify the role of electron-phonon coupling in the charge-density-wave transition.
- Explore Luttinger liquid behavior in these materials.
Main Methods:
- Laser-based angle-resolved photoemission spectroscopy (ARPES).
- Band-selective electron-phonon coupling analysis.
Main Results:
- The normal phase of A0.3MoO3 exhibits Luttinger liquid characteristics.
- A charge-density-wave emerges upon cooling.
- Observed strong band dispersion renormalizations attributed to Holstein polarons from electron-phonon coupling.
Conclusions:
- Strong electron-phonon coupling is crucial for the electronic properties and charge-density-wave transition in blue bronzes.
- The study reconciles long-standing debates on blue bronze electronic properties.
- Provides a platform for studying excitations in Luttinger liquid materials.
