Super deformability and thermoelectricity of bulk γ-InSe single crystals

• 作者: Bin Zhang Hong Wu Kunling Peng Xingchen Shen Xiangnan Gong Sikang Zheng Xu Lu Guoyu Wang Xiaoyuan Zhou
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY
• 页码范围: 650-658
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/abf133

摘要

Indium selenide,a Ⅲ-Ⅴ group semiconductor with layered structure,attracts intense attention in various photoelectric applications,due to its outstanding properties.Here,we report super deformability and thermoelectricity of γ-InSe single crystals grown by modified Bridgeman method.The crystal structure of InSe is studied systematically by transmission electron microscopy methods combined with x-ray diffraction and Raman spectroscopy.The predominate phase of γ-InSe with dense stacking faults and local multiphases is directly demonstrated at atomic scale.The bulk γ-InSe crystals demonstrate surprisingly high intrinsic super deformative ability which is highly pliable with bending strains exceeding 12.5％ and 264％ extension by rolling.At the meantime,InSe also possesses graphite-like features which is printable,writable,and erasable.Finally,the thermoelectric properties of γ-InSe bulk single crystals are preliminary studied and thermal conductivity can be further reduced via bending-induced defects.These findings will enrich the knowledge of structural and mechanical properties' flexibility of InSe and shed lights on the intrinsic and unique mechanical properties of InSe polytypes.