Interweaving Polar Charge Orders in a Layered Metallic Super-atomic Crystal

Electronic properties of super-atomic crystals have not been sufficiently explored due to the versatility of their building units; moreover, their inter-unit couplings are even poorly understood. Here, we present a joint experiment-theory investigation of a rational-designed layered super-atomic cry...

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Published inarXiv.org
Main Authors Xing, Shuya, Wu, Linlu, Wang, Zilu, Chen, Xu, Liu, Haining, Han, Shuo, Le, Lei, Zhou, linwei, Zheng, Qi, Huang, Li, Lin, Xiao, Xie, Liming, Chen, Xiaolong, Hong-Jun, Gao, Cheng, Zhihai, Guo, Jiangang, Wang, Shancai, Ji, Wei
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 12.10.2022
Subjects
Covalence
Crystal structure
Fermi surfaces
Layered materials
Photoelectric emission
Raman spectra
Scanning tunneling microscopy
Spectrum analysis
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Summary:Electronic properties of super-atomic crystals have not been sufficiently explored due to the versatility of their building units; moreover, their inter-unit couplings are even poorly understood. Here, we present a joint experiment-theory investigation of a rational-designed layered super-atomic crystal of Au6Te12Se8 cubes, stacked by non-covalent inter-cube quasi-bonds. We found a sequential-emerged anisotropic triple-cube charge-density-wave (tc-CDW) and polarized metallic states below 120 K, as revealed via scanning tunneling microscopy/spectroscopy, angle-resolved photoemission spectroscopy, transport measurement, Raman spectra, and density functional theory. The polarized states are locked in an anti-parallel configuration, which is required for maintaining the inversion symmetry of the center-cube in the tc-CDW. The anti-polar metallic states are thus interweaved by the charge-density-wave and the polarized metallic states, and primarily ascribed to electronic effects via theoretical calculations. This work not only demonstrates a microscopic picture of the interweaved CDW and polarized charge orders in the super-atomic crystal of ATS, but also sheds light on expanding the existing category of quantum materials to non-covalent solids.
ISSN:2331-8422