| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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
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| Cite this article: |
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Chu-Hong Yang, Shu-Yu Zheng, Jie Fan et al 2018 Chin. Phys. Lett. 35 077301 |
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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.
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Received: 18 April 2018
Published: 24 June 2018
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| PACS: |
73.23.-b
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(Electronic transport in mesoscopic systems)
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73.21.Cd
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(Superlattices)
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73.61.Ey
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(III-V semiconductors)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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| Fund: Supported by the National Basic Research Program of China under Grant Nos 2015CB921101 and 2014CB920904, and the Strategic Priority Research Program B of Chinese Academy of Sciences under Grant No XDB07010200. |
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