Chin. Phys. Lett.  2017, Vol. 34 Issue (6): 067301    DOI: 10.1088/0256-307X/34/6/067301
Coulomb-Dominated Oscillations in Fabry–Perot Quantum Hall Interferometers
Yu-Ying Zhu1,2, Meng-Meng Bai1,2, Shu-Yu Zheng1, Jie Fan1, Xiu-Nian Jing1,3, Zhong-Qing Ji1, Chang-Li Yang1,3, Guang-Tong Liu1**, 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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Yu-Ying Zhu, Meng-Meng Bai, Shu-Yu Zheng et al  2017 Chin. Phys. Lett. 34 067301
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Abstract Periodic resistance oscillations in Fabry–Perot quantum Hall interferometers are observed at integer filling factors of the constrictions, $f_{\rm c}=1$, 2, 3, 4, 5 and 6. Rather than the Aharonov–Bohm interference, these oscillations are attributed to the Coulomb interactions between interfering edge states and localized states in the central island of an interferometer, as confirmed by the observation of a positive slope for the lines of constant oscillation phase in the image plot of resistance in the $B$–$V_{\rm S}$ plane. Similar resistance oscillations are also observed when the area $A$ of the center regime and the backscattering probability of interfering edge states are varied, by changing the side-gate voltages and the configuration of the quantum point contacts, respectively. The oscillation amplitudes decay exponentially with temperature in the range of 40 mK$ < T\leq 130$ mK, with a characteristic temperature $T_{\rm 0}\sim 25$ mK, consistent with recent theoretical and experimental works.
Received: 09 March 2017      Published: 23 May 2017
PACS:  73.43.Jn (Tunneling)  
  73.23.-b (Electronic transport in mesoscopic systems)  
  73.43.-f (Quantum Hall effects)  
Fund: Supported by the National Basic Research Program of China under Grant No 2014CB920904, the National Natural Science Foundation of China under Grant No 91221203, and the Strategic Priority Research Program B of the Chinese Academy of Sciences under Grant No XDB07010200.
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Yu-Ying Zhu
Meng-Meng Bai
Shu-Yu Zheng
Jie Fan
Xiu-Nian Jing
Zhong-Qing Ji
Chang-Li Yang
Guang-Tong Liu
Li Lu
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