Layered Quantum Systems

The banner image shows an atomically resolved STM topography of an assembled van der Waals heterostructure.

About

Van der Waals heterostructures enable the engineering of exotic quantum states by proximity effects. We use cutting-edge techniques for the fabrication of ultraclean heterostructures - a crucial requirement to study their properties with our state-of-the-art scanning probe microscopes.

Read more about the Young Investigator Group "Layered quantum systems".

Research Topics

  • Assembly of van der Waals heterostructures
  • Characterisation of topological states
  • Proximity effects

Contact

Dr. Felix Lüpke

PGI-3

Building 02.4w / Room 301

+49 2461/61-6977

E-Mail

Members

Dr. Amin KarimiPostdocBuilding 02.4w / Room 332+49 2461/61-4131
Janine LorenzPhD studentBuilding 02.4w / Room 102+49 2461/61-8984
Abhisek KolePhD studentBuilding 02.4w / Room 329+49 2461/61-6977
Sandhya AnchamkudyPhD studentBuilding 02.4w / Room 329+49 2461/61-4131

Research

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Assembly of van der Waals Heterostructures

In our lab, we assemble heterostructures from exfoliated flakes of layered materials using novel polymer-based fabrication techniques, allowing the manipulation of flakes with micron precision, while maintaining atomically clean surfaces and interfaces.

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Characterisation of Topological States

Topological edge and surface states have unique electronic properties which make them promising candidates for applications, e.g. in quantum computing. Using scanning probe techniques, we study the local properties of topological boundary states in layered materials.

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Proximity Effects

By exploiting proximity effects between materials with different properties, van der Waals heterostructures allow the systematic engineering of quantum states. In our research, we study the local strength of proximity effects as a function of, e.g., material thickness, temperature, and magnetic field in a scanning probe setting.

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Moiré Lattices

A moiré lattice is a phenomenon that is commonly observed when two lattice structures, such as layers of two dimensional crystals, with different lattice periodicities or a rotational misalignment, are combined. Moiré superlattices result in new electronic properties that can be manipulated and tuned, making them a versatile platform for the enginnering of quantum states.

Recent Publications
  • J. K. Hofmann, H. Jeon, S. M. Hus, Y. Zhang, M. Zheng, T. Wichmann, A.-P. Li, J.-J. Zhou, Z. Wang, Y. Yao, B. Voigtländer, F. S. Tautz, and F. Lüpke, “Shear-resistant topology in quasi one-dimensional van der waals material Bi4Br4”, ArXiv:2411.13320 [cond-mat.mes-hall] (2024). https://doi.org/10.48550/arXiv.2411.13320
  • H. Boban, M. Qahosh, X. Hou, T. Sobol, E. Beyer, M. Szczepanik, D. Baranowski, S. Mearini, V. Feyer, Y. Mokrousov, K. Jin, T. Wichmann, J. Martinez-Castro, M. Ternes, F. S. Tautz, F. Lüpke, C. M. Schneider, J. Henk, and L. Plucinski, “Scattering makes a difference in circular dichroic angle-resolved photoemission”, arXiv:2410.19652 cond-mat.mtrl-sci] (2024). https://doi.org/10.48550/arXiv.2410.19652
  • K. Jin, T. Wichmann, S. Wenzel, T. Samuely, O. Onufriienko, P. Szabó, K. Watanabe, T. Taniguchi, J. Yan, F. S. Tautz, F. Lüpke, M. Ternes, and J. Martinez-Castro, “Assembly of arbitrary designer heterostructures with atomically clean interfaces”, Adv. Mater. Interfaces 11, 2300658 (2023). https://doi.org/10.1002/admi.202300658
Last Modified: 24.01.2025
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