Diode effect in Josephson junctions with a single magnetic atom

M Trahms, L Melischek, JF Steiner, B Mahendru… - Nature, 2023 - nature.com
Current flow in electronic devices can be asymmetric with bias direction, a phenomenon
underlying the utility of diodes and known as non-reciprocal charge transport. The promise …

Sublattice modulated superconductivity in the kagome Hubbard model

T Schwemmer, H Hohmann, M Dürrnagel, J Potten… - Physical Review B, 2024 - APS
We identify a superconducting order featuring spatial pair modulations on the kagome lattice
subject to on-site Hubbard U and nearest-neighbor V interactions. Within our functional …

Cooper pair excitation mediated by a molecular quantum spin on a superconducting proximitized gold film

S Trivini, J Ortuzar, K Vaxevani, J Li, FS Bergeret… - Physical Review Letters, 2023 - APS
Breaking a correlated pair in a superconductor requires an even number of fermions
providing at least twice the pairing energy Δ. Here, we show that a single tunneling electron …

Yu-shiba-rusinov qubit

A Mishra, P Simon, T Hyart, M Trif - PRX Quantum, 2021 - APS
Magnetic impurities in s-wave superconductors lead to spin-polarized Yu-Shiba-Rusinov
(YSR) in-gap states. Chains of magnetic impurities offer one of the most viable routes for the …

Controlling Majorana hybridization in magnetic chain-superconductor systems

OA Awoga, I Ioannidis, A Mishra, M Leijnse, M Trif… - Physical Review …, 2024 - APS
We propose controlling the hybridization between Majorana zero modes at the ends of
magnetic adatom chains on superconductors by an additional magnetic adatom deposited …

Microwave excitation of atomic scale superconducting bound states

J Siebrecht, H Huang, P Kot, R Drost… - Nature …, 2023 - nature.com
Magnetic impurities on superconductors lead to bound states within the superconducting
gap, so called Yu-Shiba-Rusinov (YSR) states. They are parity protected, which enhances …

[PDF][PDF] Pair density wave instability in the kagome Hubbard model

T Schwemmer, H Hohmann, M Dürrnagel… - arxiv preprint arxiv …, 2023 - researchgate.net
We identify a pair density wave (PDW) instability for electrons on the kagome lattice subject
to onsite Hubbard U and nearest neighbor V interactions. Within our functional …

Universal scaling of tunable Yu-Shiba-Rusinov states across the quantum phase transition

H Huang, S Karan, C Padurariu, B Kubala… - Communications …, 2023 - nature.com
Quantum magnetic impurities give rise to a wealth of phenomena attracting tremendous
research interest in recent years. On a normal metal, magnetic impurities generate the …

Andreev spin-noise detector

R Capecelatro, V Brosco, G Campagnano… - Physical Review B, 2023 - APS
We investigate the possibility to employ magnetic Josephson junctions as magnetic noise
detectors. To illustrate our idea, we consider a system consisting of a quantum dot coupled …

Zeeman effects on Yu-Shiba-Rusinov states

T Machida, Y Nagai, T Hanaguri - Physical Review Research, 2022 - APS
When the exchange interaction between the impurity spin and the spins of itinerant
quasiparticles is strong or weak enough, the ground states for a magnetic impurity in a …