Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

Wei M. T.; Draelos A. W.; Seredinski A.; Ke C. T.; Li H.; Mehta Y.; Watanabe K.; Taniguchi T.; Yamamoto M.; Tarucha S.; Finkelstein G.; Amet F.; Borzenets I. V

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Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

机译：用超导体邻近Quantum Hall边缘之间的手性Quasiparticle隧道

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We study a two-terminal graphene Josephson junction with contacts shaped to form a narrow constriction, less than 100 nm in length. The contacts are made from type-II superconducting contacts and able to withstand magnetic fields high enough to reach the quantum Hall regime in graphene. In this regime, the device conductance is determined by edge states, plus the contribution from the constricted region. In particular, the constriction area can support supercurrents up to fields of similar to 2.5 T. Additionally, enhanced conductance is observed through a wide range of magnetic fields and gate voltages. This additional conductance and the appearance of supercurrent is attributed to the tunneling between counterpropagating quantum Hall edge states along opposite superconducting contacts.

机译：我们研究了一个双端子石墨烯Josephse Enction，其触点成形为形成狭窄的收缩，长度为100nm。触点由II型超导触点制成，并且能够承受足够高的磁场以在石墨烯中到达量子霍尔制度。在该制度中，设备电导由边缘状态确定，加上来自收缩区域的贡献。特别地，收缩区域可以支持高达与2.5T类似的场的超电流。另外，通过各种磁场和栅极电压观察到增强的电导。这种额外的电流和超级电流的外观归因于沿着相反的超导触点的逆流量子霍尔边缘状态之间的隧道。

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来源
《Physical review》 |2019年第12期|121403.1-121403.5|共5页
作者
Wei M. T.; Draelos A. W.; Seredinski A.; Ke C. T.; Li H.; Mehta Y.; Watanabe K.; Taniguchi T.; Yamamoto M.; Tarucha S.; Finkelstein G.; Amet F.; Borzenets I. V;
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Duke Univ Dept Phys Durham NC 27708 USA;

Duke Univ Dept Phys Durham NC 27708 USA;

Duke Univ Dept Phys Durham NC 27708 USA;

Duke Univ Dept Phys Durham NC 27708 USA;

Appalachian State Univ Dept Phys & Astron Boone NC 28607 USA;

Appalachian State Univ Dept Phys & Astron Boone NC 28607 USA;

NIMS Adv Mat Lab Tsukuba Ibaraki 3050044 Japan;

NIMS Adv Mat Lab Tsukuba Ibaraki 3050044 Japan;

RIKEN CEMS Wako Saitama 3510198 Japan;

RIKEN CEMS Wako Saitama 3510198 Japan;

Duke Univ Dept Phys Durham NC 27708 USA;

Appalachian State Univ Dept Phys & Astron Boone NC 28607 USA;

City Univ Hong Kong Dept Phys Kowloon Hong Kong Peoples R China;

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1. Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor [J] . Wei M. T., Draelos A. W., Seredinski A., Physical review, B . 2019,第12期

机译：用超导体邻近Quantum Hall边缘之间的手性Quasiparticle隧道
2. Edge states and tunneling of non-Abelian quasiparticles in the v=5/2 quantum Hall state and p+ip superconductors [J] . Paul Fendley, Matthew P. A. Fisher, Chetan Nayak Physical review. B, Condensed Matter And Materials Physics . 2007,第4期

机译：v = 5/2量子霍尔态和p + ip超导体的非阿贝尔拟粒子的边缘态和隧穿
3. Anomalous Hall effect in semiconductor quantum wells in proximity to chiral p-wave superconductors [J] . F. Yang, T. Yu, M. W. Wu Physical review. B, Condensed Matter And Materals Physics . 2018,第20期

机译：手性p波超导体附近的半导体量子阱中的异常霍尔效应
4. Tunnelling experiments in fractional quantum hall effect: What the tunnelling quasiparticle effective charge tells about [C] . Snizhko Kyrylo 2015 International Young Scientists Forum on Applied Physics . 2015

机译：分数量子霍尔效应中的隧穿实验：隧穿准粒子有效电荷说明了什么
5. Quasiparticle Tunneling and High Bias Breakdown in the Fractional Quantum Hall Effect. [D] . Dillard, Colin Ramsay. 2012

机译：分数量子霍尔效应中的准粒子隧穿和高偏置击穿。
6. Spectroscopic fingerprint of chiral Majorana modes at the edge of a quantum anomalous Hall insulator/superconductor heterostructure [O] . Junying Shen, Jian Lyu, Jason Z. Gao, 2020

机译：量子异常霍尔绝缘子/超导体异质结构边缘的手性马太蚌模式的光谱指纹
7. Edge states and tunneling of non-Abelian quasiparticles in the nu=5/2 quantum Hall state and p+ip superconductors [O] . Fendley, Paul, Fisher, Matthew P. A., Nayak, Chetan 2006

机译：边界状态和非阿贝尔准粒子在nu = 5/2中的隧道效应量子霍尔态和p + ip超导体

Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

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