Double Andreev reflections at surface states of the topological insulators with hexagonal warping

Zhu, Chang-Yong; Zheng, Shi-Han; Duan, Hou-Jian; Deng, Ming-Xun; Wang, Rui-Qiang

doi:10.1007/s11467-019-0941-0

Front. Phys.

2019

DOI: 10.1007/s11467-019-0941-0

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Double Andreev reflections at surface states of the topological insulators with hexagonal warping

Chang-Yong Zhu

Shi-Han Zheng

Hou-Jian Duan

et al.

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Cited by 7 publications

References 41 publications

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A Perfect Andreev Reflection Induced by Anderson Disorder in a Normal–Superconductor Junction

Zhang

2021

Physica Status Solidi (b)

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The electronic transport properties of a 2D normal metal superconductor are studied by a nonequilibrium Green's function method. The normal metal is the non‐inverted HgTe/CdTe quantum well doped by electrons. It is found that Andreev reflection (AR) is enhanced in the weak disorder regime while weakened in the strong disorder regime. However, the AR coefficient can be perfect ( T normalA = 1 ) with vanished fluctuations in the moderate disorder regime, whereas other scattering processes are forbidden. The mechanism goes that Anderson disorder leads to a topological Anderson insulator with bulk states localized while edge states still extensive. Multiple ARs and spin‐momentum locking cooperate to vanish the normal reflection and leave AR only. A detailed numerical study shows that fixing the Fermi surface in conduction band, a large enough junction width, and a strong coupling between the normal and superconducting leads are necessary for perfect AR.

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A Perfect Andreev Reflection Induced by Anderson Disorder in a Normal–Superconductor Junction

Zhang

2021

Physica Status Solidi (b)

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Andreev reflections in deformed semi-Dirac material superconducting junctions

He,

Duan,

Zhu

et al. 2024

Physics Letters A

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Effect of chiral anomaly on Andreev reflection in a tilted Weyl semimetal hybrid junction

Zhu

Zhou

et al. 2021

Phys. Rev. B

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Double Andreev reflections at surface states of the topological insulators with hexagonal warping

Cited by 7 publications

References 41 publications

A Perfect Andreev Reflection Induced by Anderson Disorder in a Normal–Superconductor Junction

A Perfect Andreev Reflection Induced by Anderson Disorder in a Normal–Superconductor Junction

Andreev reflections in deformed semi-Dirac material superconducting junctions

Effect of chiral anomaly on Andreev reflection in a tilted Weyl semimetal hybrid junction

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