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arXiv · 1802.05436

Detection of fractional solitons in quantum spin Hall systems

C. Fleckenstein·N. Traverso Ziani·B. Trauzettel
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Abstract

We propose two experimental setups that allow for the implementation and the detection of fractional solitons of the Goldstone-Wilczek type. The first setup is based on two magnetic barriers at the edge of a quantum spin Hall system for generating the fractional soliton. If then a quantum point contact is created with the other edge, the linear conductance shows evidence of the fractional soliton. The second setup consists of a single magnetic barrier covering both edges and implementing a long quantum point contact. In this case, the fractional soliton can unambiguously be detected as a dip in the conductance without the need to control the magnetization of the barrier.

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C. Fleckenstein, N. Traverso Ziani, B. Trauzettel. 2018-02-15. Detection of fractional solitons in quantum spin Hall systems. https://doi.org/10.1209/0295-5075/121/57003

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