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Magnetic-field-controlled negative differential conductance in graphene npn junction resonators
Si-Yu Li, Haiwen Liu, Jia-Bin Qiao +2
Negative differential conductance (NDC), characterized by the decreasing current with increasing voltage, has attracted continuous attention for its various novel applications. The…
Disorder Effects in Topological States -- Brief Review of the Recent Developments
Binglan Wu, Juntao Song, Jiaojiao Zhou +1
Disorder inevitably exists in realistic samples, manifesting itself in various exotic properties for the topological states. In this paper, we summarize and briefly review work com…
Perfect valley filter based on topological phase in disordered Monolayer Heterostructure
Shu-guang Cheng, Rui-zhi Zhang, Jiaojiao Zhou +2
The hydrogenated monolayer epitaxially grown on a substrate is a novel type of two-dimensional material hosting quantum spin-quantum anomalous Hall (QS-QAH…
The valley filter efficiency of monolayer graphene and bilayer graphene line defect model
Shu-guang Cheng, Jiaojiao Zhou, Hua Jiang +1
In addition to electron charge and spin, novel materials host another degree of freedom, the valley. For a junction composed of valley filter sandwiched by two normal terminals, we…
Ultraquantum magnetoresistance in Kramers Weyl semimetal candidate -Ag2Se
Cheng-Long Zhang, Frank Schindler, Haiwen Liu +14
The topological semimetal -Ag2Se features a Kramers Weyl node at the origin in momentum space and a quadruplet of spinless Weyl nodes, which are annihilated by spin-orbit coupli…
Doubled Shapiro Steps in a Topological Josephson Junction
Yu-Hang Li, Jie Liu, Juntao Song +3
We study the transport properties of a superconductor-quantum spin Hall insulator-superconductor (S-QSHI-S) hybrid system in the presence of a microwave radiation. Instead of adiab…