6 papers
Transparency-controlled multiple charge transfer in superconducting junctions with local shot-noise scanning tunneling spectroscopy
Yudai Sato, Maialen Ortego Larrazabal, Jian-Feng Ge +6
Charge transport in superconducting junctions at finite voltages is governed by Andreev reflections, including multiple Andreev reflections, which are processes that enable multipl…
Imaging the high-frequency charging dynamics of a single impurity in a semiconductor on the atomic scale
Maialen Ortego Larrazabal, Jiasen Niu, Stephen R. McMillan +4
As electronic devices approach the atomic limit, the charge dynamics of individual dopant atoms increasingly constrain performance, stability, and coherence. In scanning tunnelling…
Melting of quantum Hall Wigner and bubble crystals
H. Xia, Qianhui Xu, Jiasen Niu +7
A two-dimensional crystal melts via the proliferation and unbinding of topological defects, yet quantitatively predicting the melting temperature in real systems is challengi…
Tapping-mode SQUID-on-tip Microscopy with Proximity Josephson Junctions
Matthijs Rog, Tycho J. Blom, Daan B. Boltje +6
Studying nanoscale dynamics is essential for understanding quantum materials and advancing quantum chip manufacturing. Still, it remains a major challenge to measure non-equilibriu…
Direct visualization of quasiparticle concentration around superconducting vortices
Jian-Feng Ge, Koen M. Bastiaans, Jiasen Niu +3
Bogoliubov quasiparticles play a crucial role in understanding the behavior of a superconductor, and in achieving reliable operations of superconducting quantum circuits. Diagnosis…
Equivalence of pseudogap and pairing energy in a cuprate high-temperature superconductor
Jiasen Niu, Maialen Ortego Larrazabal, Thomas Gozlinski +8
The pseudogap stands out in the phase diagram of the cuprate high-temperature superconductors because its origin and relationship to superconductivity remain elusive. The origin of…