期刊
NATURE PHYSICS
卷 13, 期 8, 页码 806-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS4112
关键词
-
资金
- European Union [ERC-692670, 696656]
- MIUR-Futuro in ricerca Grant in the frame of the ULTRANANO Project [RBFR13NEA4]
- MIUR through the PRIN Programme [2015C5SEJJ001]
- SISSA/CNR project 'Superconductivity, Ferroelectricity and Magnetism in Bad Metals' [232/2015]
- Universita Cattolica del Sacro Cuore [D.1, D.2.2, D.3.1]
- Fondazione E.U.L.O
- Max Planck-UBC Centre for Quantum Materials
- Canada First Research Excellence Fund, Quantum Materials and Future Technologies Program
- Killam Fellowship
- Alfred P. Sloan Fellowship
- Natural Sciences and Engineering Research Council of Canada's (NSERC's) Steacie Memorial Fellowship
- Alexander von Humboldt Fellowship
- Canada Research Chairs Program
- NSERC
- Canada Foundation for Innovation (CFI)
- CIFAR Quantum Materials
The influence of Mott physics on the doping-temperature phase diagram of copper oxides represents a major issue that is the subject of intense theoretical and experimental efforts. Here, we investigate the ultrafast electron dynamics in prototypical single-layer Bi-based cuprates at the energy scale of the O-2p -> Cu-3d charge-transfer (CT) process. We demonstrate a clear evolution of the CT excitations from incoherent and localized, as in a Mott insulator, to coherent and delocalized, as in a conventional metal. This reorganization of the high-energy degrees of freedom occurs at the critical doping p(cr) approximate to 0.16 irrespective of the temperature, and it can be well described by dynamical mean-field theory calculations. We argue that the onset of low-temperature charge instabilities is the low-energy manifestation of the underlying Mottness that characterizes the p < p(cr) region of the phase diagram. This discovery sets a new framework for theories of charge order and low-temperature phases in underdoped copper oxides.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据