Transport Studies on GaAs/AlGaAs Two-Dimensional Electron Systems Modulated by Triangular Array of Antidots
Chu-Hong Yang1,2, Shu-Yu Zheng1, Jie Fan1, Xiu-Nian Jing1,3, Zhong-Qing Ji1, Guang-Tong Liu1, Chang-Li Yang1,3**, Li Lu1,3
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 2University of Chinese Academy of Sciences, Beijing 100049 3Collaborative Innovation Center of Quantum Matter, Beijing 100871
Abstract：Triangular antidot lattices of various periods and aspect ratios are fabricated on high mobility GaAs/AlGaAs two-dimensional electron systems (2DESs), and are characterized by magneto-transport measurements at low temperatures down to 300 mK. Commensurability peaks are generally observed in the magneto-resistivity $\rho_{xx}$, and remarkable similarity between $d\rho_{xy}/dB$ and $\rho_{xx}$ is found. In samples of relatively large aspect ratio $d/a$, the Aharonov–Bohm-type oscillations are clearly observed in both $\rho_{xx}$ and $\rho_{xy}$, as well as the quenching of the Hall resistivity $\rho_{xy}$ in the vicinity of $B=0$. These observations evince the good quality of our samples, and attest to the adequate preparation for fabricating antidot lattices of a reduced period to realize artificial graphene from GaAs/AlGaAs 2DESs.
(Electronic transport in nanoscale materials and structures)
引用本文:
. [J]. 中国物理快报, 2018, 35(7): 77301-.
Chu-Hong Yang, Shu-Yu Zheng, Jie Fan, Xiu-Nian Jing, Zhong-Qing Ji, Guang-Tong Liu, Chang-Li Yang, Li Lu. Transport Studies on GaAs/AlGaAs Two-Dimensional Electron Systems Modulated by Triangular Array of Antidots. Chin. Phys. Lett., 2018, 35(7): 77301-.
2018, Vol. 35 
