Skip to content
DraconiticResearch
Search Sources API
190,335 studies31 sourcesUpdated 5 min ago
Peer-reviewedCC BYNano letters

Proximitized Topological Insulator Charge Island Fabricated via In Situ Multi-Angle Stencil Lithography.

  • Benedikt Frohn1
  • Tobias Schmitt1
  • Vanessa Serrano1
  • Anne Schmidt1
  • Michael Schleenvoigt1
  • Albert Hertel1
  • Benjamin Bennemann1
  • Abdur Rehman Jalil1
  • Detlev Grützmacher1
  • Peter Schüffelgen1
  1. 1PGI-9, Forschungszentrum Jülich and JARA Jülich-Aachen Research Alliance, 52425Jülich, Germany.
Read full textPDFDOICite

Abstract

Hybrid superconductor-topological insulator (TI) nanostructures constitute a promising material platform for exploring proximity-induced superconductivity in systems with topologically protected surface states. A key obstacle has been the realization of clean and well-controlled superconductor-TI interfaces, as TI surfaces rapidly degrade under ambient conditions. Here, we introduce a fully in situ, multi-angle stencil lithography technique that enables the fabrication of proximitized charge islands in TIs. The approach combines selective area growth of (Bi,Sb)2Te3 nanoribbons with angle-controlled deposition of diffusion barriers, superconducting Al, and ultrathin oxide tunnel barriers, allowing scalable fabrication of hybrid nanostructures without post-growth processing. Low-temperature transport measurements reveal robust Coulomb blockade and a pronounced suppression of low-energy conductance, which vanishes with a magnetic field, consistent with proximity-induced superconductivity in the island. These results establish a versatile nanofabrication platform that enables access to previously unexplored TI-based hybrid quantum devices and opens new routes for investigating superconductivity in topological nanostructures.

Related

  1. Multiple chiral Majorana states in proximitized magnetic topological insulator heterostructures
    Alejandro S. Gómez, Rafael A. Molina, Pablo Burset +1
    arXivPreprintarXiv licenceFull textCondensed matterarXiv
  2. Topological Lithography via External Field: Creating Topological States Anywhere Beyond the Edge
    Haoran Nie, Chaoran Jiang, Xiangying Shen +1
    arXivPreprintarXiv licenceFull textApplied physics & instrumentationCondensed matterarXiv
  3. Spinless Charged Excitation at the Interface between a Conventional Topological Insulator and a Topological Mott Insulator
    Cesar A. Gallegos, Andrew J. Millis, Steven R. White
    arXivPreprintCC BY 4.0Full textCondensed matterarXiv
  4. Anomalous Metallic States at Magnetic Interfaces in an Antiferromagnetic Topological Insulator Candidate DyPtBi with Ferroquadrupolar Order
    Kentaro Ueda, Hiraku Saito, Zen Ogame +6
    Physical Review XPeer-reviewedCC BY 4.0Atomic, molecular & optical physicsAPS
  5. Nonlinear responses induced by inhomogeneous edge states in a centrosymmetric topological insulator
    Yitian Guo, Chengxin Jiang, Chenxi Liu +19
    Nature CommunicationsPeer-reviewedCC BY-NC-ND 4.0Atomic, molecular & optical physicsCrossref

Cite

BibTeXRIS
BibTeX
@article{frohn2026proximitized,
  title = {{Proximitized Topological Insulator Charge Island Fabricated via In Situ Multi-Angle Stencil Lithography.}},
  author = {Benedikt Frohn and Tobias Schmitt and Vanessa Serrano and Anne Schmidt and Michael Schleenvoigt and Albert Hertel and Benjamin Bennemann and Abdur Rehman Jalil and Detlev Grützmacher and Peter Schüffelgen},
  journal = {Nano letters},
  year = {2026},
  month = oct,
  doi = {10.1021/acs.nanolett.6c02350},
  url = {https://europepmc.org/article/MED/42917066},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Proximitized Topological Insulator Charge Island Fabricated via In Situ Multi-Angle Stencil Lithography.
AU  - Benedikt Frohn
AU  - Tobias Schmitt
AU  - Vanessa Serrano
AU  - Anne Schmidt
AU  - Michael Schleenvoigt
AU  - Albert Hertel
AU  - Benjamin Bennemann
AU  - Abdur Rehman Jalil
AU  - Detlev Grützmacher
AU  - Peter Schüffelgen
PY  - 2026
DA  - 2026/10/01
JO  - Nano letters
DO  - 10.1021/acs.nanolett.6c02350
UR  - https://europepmc.org/article/MED/42917066
AB  - Hybrid superconductor-topological insulator (TI) nanostructures constitute a promising material platform for exploring proximity-induced superconductivity in systems with topologically protected surface states. A key obstacle has been the realization of clean and well-controlled superconductor-TI interfaces, as TI surfaces rapidly degrade under ambient conditions. Here, we introduce a fully in situ, multi-angle stencil lithography technique that enables the fabrication of proximitized charge islands in TIs. The approach combines selective area growth of (Bi,Sb)2Te3 nanoribbons with angle-controlled deposition of diffusion barriers, superconducting Al, and ultrathin oxide tunnel barriers, allowing scalable fabrication of hybrid nanostructures without post-growth processing. Low-temperature transport measurements reveal robust Coulomb blockade and a pronounced suppression of low-energy conductance, which vanishes with a magnetic field, consistent with proximity-induced superconductivity in the island. These results establish a versatile nanofabrication platform that enables access to previously unexplored TI-based hybrid quantum devices and opens new routes for investigating superconductivity in topological nanostructures.
SN  - 1530-6984
SN  - 1530-6992
ER  -