Seminar announcement

Monday 30th June at 11:00am – Seminar Room Louis Michel at CPHT, Ecole Polytechnique

 

Title: Topological superconductivity and charge order in Sn/Si(111)

 

Stephan Rachel, University of Melbourne Australia

 

Abstract:

In this talk, I will discuss competing many-body states on the triangular lattice. Motivated by the recently discovered superconductivity in boron-doped Sn/Si(111) with a Tc as high as 10K [1], I will focus on unconventional superconductivity of correlated electrons on the triangular lattice. I will further demonstrate the significance of Rashba spin-orbit couling for materials such as Sn/Si(111) and show that the superconducting phase possesses a surprisingly rich Chern-number landscape [2]. I will discuss the implications of our findings for Sn/Si(111), compare observables and also emphasize the significance of related compounds such as Pb/Si(111) and Sn/SiC(0001) [3].

 

[1] F. Ming, X. Wu, C. Chen, K. D. Wang, P. Mai, T. A. Maier, J. Strockoz, J. W. F. Venderbos, C. Gonzalez, J. Ortega, S. Johnston, and H. H. Weitering, Nat. Phys. 19, 500 (2023).

[2] M. Bunney, J. Beyer, R. Thomale, C. Honerkamp, S. Rachel, Phys. Rev. B Letters 110, L161103 (2024).

[3] L. Marchetti, M. Bunney, D. Di Sante, S. Rachel, Phys. Rev. B 111, 125115 (2024).

 

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