Thermoelectric Detection of Crossed Andreev Reflections in Quantum Hall/Superconductor Hybrid Structures
Jiashu Wang, Sina Ahadi, Boliang Liu, Leon Balents, Simon Munyan, Susanne Stemmer · 2026
Read Thermoelectric Detection of Crossed Andreev Reflections in Quantum Hall/Superconductor Hybrid Structures by Jiashu Wang, Sina Ahadi, Boliang Liu, Leon Balents, Simon Munyan, Susanne Stemmer (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13396179.txt.
Description
Wang and team demonstrate, in 2026, a thermoelectric method for detecting crossed Andreev reflection in hybrid devices that join a quantum Hall insulator to a superconductor. In crossed Andreev reflection, an electron moving along a one-way edge channel turns into a hole leaving downstream, a process prized for future quantum technology. The team coupled the edge modes of cadmium arsenide films to a thin superconducting strip made of niobium nitride.
Downstream resistance and thermoelectric response oscillated as the magnetic field changed. The electrical signal stayed electron-like in sign, likely swamped by elastic co-tunneling, a competing process that mimics the target effect. The thermoelectric signal behaved differently: it alternated in sign, betraying the hole-like part that resistance measurements hid. The authors argue that heat-based readings offer a cleaner probe for disentangling Andreev processes from tunneling at these interfaces, an important step toward Cooper pair splitters.
Catalog record
| CREATOR | Jiashu Wang, Sina Ahadi, Boliang Liu, Leon Balents, Simon Munyan, Susanne Stemmer |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 23 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |