Anisotropy of lattice vibrations and optoelectronic properties in layered KGaS2 single crystal
Abstract
Low-dimensional materials have the potential for application in polarization-sensitive optoelectronic devices. In this work, we systematically investigated the lattice vibration and photoelectric properties of low-symmetry KGaS2 single crystals. The temperature-dependent Raman spectroscopy revealed the linear dependence of Raman modes on temperatures. The first-order temperature coefficient (χ) of the KGaS2 Raman mode ranges from −0.006 95 to −0.031 09 cm−1/K. Angle-resolved polarized Raman spectroscopy demonstrates the anisotropy of lattice vibrations. Interestingly, KGaS2 exhibits anisotropic transport behavior with a conductance ratio of 6.5 and a photocurrent ratio of about 1.6. The results demonstrate that KGaS2 is a promising candidate material for fabricating polarization-sensitive photodetectors and ignite future research interest in layered AIBIIIQ2VI compounds.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (9)
Jianan Li
Xue Chen
Canhui Pan
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Multifunctional Ionic Electronic Materials and Devices, College of Physics and Electronics, Hunan Normal University , Changsha 410081, Hunan,
Kexin Chen
Junhao Huang
Beijing Frontier Research Center for Biological Structures, State Key Laboratory of Membrane Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.
Xuanmao Xu
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Multifunctional Ionic Electronic Materials and Devices, College of Physics and Electronics, Hunan Normal University , Changsha 410081, Hunan,
Jifei Wang
Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics Hunan Normal University Changsha 410081 P.R. China
Weike Wang
Dongsheng Tang
Synergetic Innovation Center for Quantum Effects and Application, Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Key Laboratory for Multifunctional Ionic Electronic Materials and Devices, College of Physics and Electronics, Hunan Normal University , Changsha 410081, Hunan,