Paired Electrons and Topology

Yesterday was a busy day for our group: Jacky gave a talk about Coulomb blockade spectroscopy; Souvik presented his previous PhD work on topological superconductivity; Shamarita showed a poster with our fresh new data on misfit superconductors. Enjoy the rest of the conference!

Today Dongming gives a talk at #DPG spring meeting in Dresden about our new results on arXiv. All our group members will present works this week. Stay tuned!

Our new preprint online: arxiv.org/abs/2603.01848 We have identified a field-tunable surface resonance—partially detached electronic states on the surface, which dominate the screening of external electric field—an effect must be considered in the design of semiconducting devices.

Research by Prof. Doohee Cho at Yonsei University in Korea, a Unisoku STM user (USM1200), has been published in Nano Letters. Congratulations! #MottInsulator #USM1200 pubs.acs.org/doi/10.1021/ac…

Takeaway message: Due to the interband coupling, and when the two distinct coherence peaks cannot be resolved, the weak modulation of the coherence peak energy can be misinterpreted in other works as a modulation of the superconducting gap in the sense of a pair density wave.

現時点での最高の精度で2H-NbSe2の分光イメージングSTMを行なって、CDWと超伝導の関係を調べたプレプリントです。Phys. Rev. Researchに掲載予定です。 初めての単著の投稿論文になります。 arxiv.org/abs/2601.15554

We are very glad to have Souvik Das joining our group as a postdoc starting this month. Souvik just finished his PhD under the supervision of Prof. Stuart Parkin at MPI for Microstructure Physics. He will work on MBE growth and characterization of new superconducting films.

A great start of the new year: this paper is now published in Phys. Rev. B. link.aps.org/doi/10.1103/39…

Our new preprint is online! arxiv.org/abs/2512.04791 We observe anomalous charge modulations near surface impurities. This local symmetry-broken phase appears to arise from a subtle interplay between non-local impurity potentials, quantum geometry, and enhanced local correlations.

4 days remaining to apply!

The coldest cubic meter in the universe just got quieter ❄️Using a “noise-canceling” algorithm, CUORE—led by @BerkeleyLab, @UCBerkeley & INFN—has set new limits on neutrinoless double beta decay, shedding light on why our universe exists at all. physics.berkeley.edu/news/new-data-…

New PhD position: we are looking for an enthusiastic student to explore the uncharted territory of chiral superconductors, and to control their chirality by ultrafast laser pulses, in collaboration with Prof. Stefan Kaiser at TU Dresden. Apply now: imprs-cpqm.mpg.de/227377/Chiral-…

Yesterday Shamarita presented a poster about Aharonov-Bohm caging in classical photonic simulators through Floquet engineering — her master work from TU Kaiserslautern — in the 2nd DPG Fall Meeting in Göttingen.

Welcome our new group member Lichen Ji, who recently got her PhD at Tsinghua University studying superconducting proximity effect. She joined us this month as a postdoc (shared with TQC Thin Films group) and she will explore chiral superconductors with molecular beam epitaxy.

Why AI chatbots lie to us | Science science.org/doi/full/10.11…

Please share this with your colleagues: We are hiring a postdoctoral researcher specializing in angle-resolved photoemission spectroscopy (ARPES). The deadline is in two weeks: cpfs.mpg.de/3716612/job_fu…

Here we go again! Time lapse of touchdown and assembly.

All boxes are open, and the cryogenic dewar is mounted on the vibration isolation table. Now comes the real heavy lifting — time to settle the system into the pit!

Today Dongming Zhao, our new postdoc who joined us earlier this month, gave an excellent introduction talk in TQC PhD and group seminar about his doctoral thesis on higher-order topological insulators. Welcome Dongming!

Today’s the big day — our STM has arrived! 🥳 All 7 crates📦are now safely stored in the basement. Huge thanks to everyone involved, and a special shoutout to our technician Ole for making it all run so smoothly. Unpacking will happen in a couple of weeks — stay tuned!