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- Title
Band-selective Holstein polaron in Luttinger liquid material A<sub>0.3</sub>MoO<sub>3</sub> (A = K, Rb).
- Authors
Kang, L.; Du, X.; Zhou, J. S.; Gu, X.; Chen, Y. J.; Xu, R. Z.; Zhang, Q. Q.; Sun, S. C.; Yin, Z. X.; Li, Y. W.; Pei, D.; Zhang, J.; Gu, R. K.; Wang, Z. G.; Liu, Z. K.; Xiong, R.; Shi, J.; Zhang, Y.; Chen, Y. L.; Yang, L. X.
- Abstract
(Quasi-)one-dimensional systems exhibit various fascinating properties such as Luttinger liquid behavior, Peierls transition, novel topological phases, and the accommodation of unique quasiparticles (e.g., spinon, holon, and soliton, etc.). Here we study molybdenum blue bronze A0.3MoO3 (A = K, Rb), a canonical quasi-one-dimensional charge-density-wave material, using laser-based angle-resolved photoemission spectroscopy. Our experiment suggests that the normal phase of A0.3MoO3 is a prototypical Luttinger liquid, from which the charge-density-wave emerges with decreasing temperature. Prominently, we observe strong renormalizations of band dispersions, which are recognized as the spectral function of Holstein polaron derived from band-selective electron-phonon coupling in the system. We argue that the strong electron-phonon coupling plays an important role in electronic properties and the charge-density-wave transition in blue bronzes. Our results not only reconcile the long-standing heavy debates on the electronic properties of blue bronzes but also provide a rare platform to study interesting excitations in Luttinger liquid materials. The mechanism of the charge density wave transition in quasi one-dimensional blue bronzes is still debated. Here, the authors report evidence of a Luttinger liquid in the normal state of blue bronzes and Holstein polarons below the transition temperature, revealing the important role of electron-phonon coupling in the transition.
- Subjects
POLARONS; LUTTINGER liquids; CHARGE density waves; PHOTOELECTRON spectroscopy; TUNGSTEN bronze; TRANSITION temperature; CUPRATES
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-26078-1