| Title | Negative linear compressibility in a crystal of alpha-BiB3O6 |
| Authors | Kang, Lei Jiang, Xingxing Luo, Siyang Gong, Pifu Li, Wei Wu, Xiang Li, Yanchun Li, Xiaodong Chen, Chuangtian Lin, Zheshuai |
| Affiliation | Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Funct Crystals & Laser Technol, Beijing Ctr Crystal R&D, Beijing 100190, Peoples R China. Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China. Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China. Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China. Univ Chinese Acad Sci, Beijing 100190, Peoples R China. |
| Keywords | ANISOTROPIC THERMAL-EXPANSION MECHANICAL METAMATERIALS BIB3O6 DIFFRACTION BORATE |
| Issue Date | 2015 |
| Publisher | SCIENTIFIC REPORTS |
| Citation | SCIENTIFIC REPORTS.2015,5. |
| Abstract | Negative linear compressibility (NLC), a rare and important mechanical effect with many application potentials, in a crystal of alpha-BiB3O6 (BIBO) is comprehensively investigated using first-principles calculations and high-pressure synchrotron X-ray diffraction experiments. The results indicate that the BIBO crystal exhibits the second largest NLC among all known inorganic materials over a broad pressure range. This unusual NLC behaviour is due to the rotation and displacement of the rigid [BO3] and [BO4] building units that result in hinge motion in an umbrella-like topology. More importantly, the parallel-polar lone-pair electrons on the Bi3+ cations act as "umbrella stands" to withstand the B-O hinges, thus significantly enhancing the NLC effect. BIBO presents a unique example of a "collapsible umbrella" mechanism for achieving NLC, which could be applied to other framework materials with lone-pair electrons. |
| URI | http://hdl.handle.net/20.500.11897/417098 |
| ISSN | 2045-2322 |
| DOI | 10.1038/srep13432 |
| Indexed | SCI(E) PubMed |
| Appears in Collections: | 地球与空间科学学院 |
