Topological phases in 2D-Telluride quantum materials

Place: conference room, IMDEA Nanociencia.

Abstract:

Two-dimensional quantum materials provide an exceptional platform to explore emergent phenomena arising from the interplay between electronic structure, magnetism, and topology. In particular, 2D tellurides, characterized by strong spin–orbit coupling and van der Waals layering, enable the stabilization and engineering of non-trivial topological phases. Their reduced dimensionality enhances quantum effects and allows precise control of band topology through heterostructuring and phase engineering.

In this seminar, I will present our recent advances in the epitaxial synthesis [1,2] and atomic-scale characterization of 2D telluride-based materials [3,4] and heterophase structures [5]. Using scanning tunneling microscopy and spectroscopy (STM/STS), we directly visualize native defects, quasiparticle interference patterns, and topological surface states, providing access to the band structure with atomic resolution in both real and reciprocal space. These results offer detailed insight into the correlated and topological phases of 2D tellurides and highlight their potential for future electronic, optical, and quantum technologies.

[1] Nanoscale 14, 10880 (2022).

[2] Small 19, 2300262 (2023)

[3] Journal of Physics: Materials 5, 044003 (2022).

[4] Advanced Materials e10877 (2025)

[5] Advanced Functional Materials 35, 2425154 (2025)

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