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Condensed Matter > Mesoscale and Nanoscale Physics
Title: Wave-function engineering on superconducting substrates: Chiral Yu-Shiba-Rusinov molecules
(Submitted on 25 Apr 2024)
Abstract: Magnetic adatoms on superconductors give rise to Yu-Shiba-Rusinov (YSR) states that hold considerable interest for the design of topological superconductivity. Here, we show that YSR states are also an ideal platform to engineer structures with intricate wave-function symmetries. We assemble structures of iron atoms on the quasi-two-dimensional superconductor $2H$-NbSe$_2$. The Yu-Shiba-Rusinov wave functions of individual atoms extend over several nanometers enabling hybridization even at large adatom spacing. We show that the substrate can be exploited to deliberately break symmetries of the adatom structure in ways unachievable in the gas phase. We highlight this potential by designing chiral wave functions of triangular adatom structures confined within a plane. Our results significantly expand the range of interesting quantum states that can be engineered using arrays of magnetic adatoms on superconductors.
Submission history
From: Katharina Franke [view email][v1] Thu, 25 Apr 2024 11:14:44 GMT (5893kb,D)
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