Multiple In-Gap States Induced by Topological Surface States in the Superconducting Topological Crystalline Insulator Heterostructure 
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Yang, Hao; Li, Yaoyi; Liu, Teng‐Teng; Guan, Dandan; Wang, Shiyong; Zheng, Hao; Liu, Canhua; Fu, Liang; Jia, Jin‐Feng

doi:10.1103/physrevlett.125.136802

Cited by 17 publications

(7 citation statements)

References 61 publications

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“…Majorana zero modes can be realized in this platform; thus, this system has potential for application in the field of topological quantum computation [2]. Experimentally, this hybrid system was successfully realized, and signatures of Majorana zero modes were indeed observed [3][4][5][6].…”

Section: Introductionmentioning

confidence: 87%

Proximity effect and inverse proximity effect in a topological-insulator/iron-based-superconductor heterostructure

Zhu,

Zhou

2023

Preprint

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We theoretically study the proximity effect and the inverse proximity effect in a topological insulator/iron-based superconductor heterostructure based on the microscopic model. The superconducting order parameter is self-consistently calculated. Its magnitude decreases when the coupling of these two systems increases. The induced pairing order parameter exhibits negative and positive values, while the negative pairing near the Γ = (0, 0) point is dominant. This parameter has twofold symmetry and includes an s-wave component and a d-wave component. The magnitude of the induced pairing order parameter has a maximal value at the coupling strength tp = 0.3 ≈ 0.06 eV. The spectral function and the local density of states are calculated and may be used to probe the proximity effect. We also discuss the feedback of the topological insulator to the iron-based superconductor layer. The normal-state Fermi surface is distorted by the coupling, and additional Fermi pockets are induced. An effective spin-orbit interaction term is induced. In the superconducting state, the previous fourfold symmetry of the order parameter is broken, and a d-wave component pairing term is also induced. Our main results can be well understood by analyzing the Fermi surfaces of the original systems.

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Section: Introductionmentioning

confidence: 87%

Proximity effect and inverse proximity effect in a topological-insulator/iron-based-superconductor heterostructure

Zhu,

Zhou

2023

Preprint

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“…Later, unconventional superconductors were used instead of s-wave superconductors in several systems [119][120][121], such as Bi 2 Te 3 /FeTe [120] and Bi 2 Te 3 /FeTe 0.55 Se 0.45 [121]; the question of whether the induced superconductivity can be regarded as chiral p-wave pairing is still under debate. Proximity-induced superconductivity was also investigated in atomically flat lateral and vertical heterostructures of TCI Sn 1−x Pb x Te and superconducting Pb [122,123]. High-resolution STM measurements make it a promising candidate for TSC.…”

Section: Artificial Candidatesmentioning

confidence: 99%

Topological superconductors from a materials perspective

Mandal¹,

Drucker²,

Siriviboon³

et al. 2023

Preprint

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Topological superconductors (TSCs) have garnered significant research and industry attention in the past two decades. By hosting Majorana bound states which can be used as qubits that are robust against local perturbations, TSCs offer a promising platform toward (nonuniversal) topological quantum computation. However, there has been a scarcity of TSC candidates, and the experimental signatures that identify a TSC are often elusive. In this perspective, after a short review of the TSC basics and theories, we provide an overview of the TSC materials candidates, including natural compounds and synthetic material systems. We further introduce various experimental techniques to

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“…Later, unconventional superconductors were used instead of s -wave superconductors in several systems, − such as Bi 2 Te 3 /FeTe and Bi 2 Te 3 /FeTe 0.55 Se 0.45 ; the question of whether the induced superconductivity can be regarded as chiral p -wave pairing is still under debate. Proximity-induced superconductivity was also investigated in atomically flat lateral and vertical heterostructures of TCI Sn 1– x Pb x Te and superconducting Pb. , High-resolution STM measurements make this a promising candidate for TSCs. A recent report on the Moiré pattern between a van der Waals superconductor (NbSe 2 ) and a monolayer ferromagnet (CrBr 3 ) proposed periodic potential modulations arising from the Moiré pattern as a powerful way to overcome the conventional constraints for realizing and controlling topological superconductivity. , Another system, such as gated monolayer WTe 2 , is reported as a higher-order topological superconducting candidate with inversion-protected Majorana corner modes without the proximity effect .…”

Section: Candidate Materialsmentioning

confidence: 99%

Topological Superconductors from a Materials Perspective

Mandal,

Drucker,

Siriviboon

et al. 2023

Chem. Mater.

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Topological superconductors (TSCs) have garnered significant research and industry attention in the past two decades. By hosting Majorana bound states which can be used as qubits that are robust against local perturbations, TSCs offer a promising platform toward (nonuniversal) topological quantum computation. However, there has been a scarcity of TSC candidates, and the experimental signatures that identify a TSC are often elusive. In this Perspective, after a short review of the TSC basics and theories, we provide an overview of the TSC materials candidates, including natural compounds and synthetic material systems. We further introduce various experimental techniques to probe TSCs, focusing on how a system is identified as a TSC candidate and why a conclusive answer is often challenging to draw. We conclude by calling for new experimental signatures and stronger computational support to accelerate the search for new TSC candidates.

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Multiple In-Gap States Induced by Topological Surface States in the Superconducting Topological Crystalline Insulator Heterostructure Sn1−xPbxTe−Pb

Cited by 17 publications

References 61 publications

Proximity effect and inverse proximity effect in a topological-insulator/iron-based-superconductor heterostructure

Proximity effect and inverse proximity effect in a topological-insulator/iron-based-superconductor heterostructure

Topological superconductors from a materials perspective

Topological Superconductors from a Materials Perspective

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