@SteinbergLab
Joined February 2023
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We are happy to share our recent paper published in Nature Comm: rdcu.be/d1UKd We find a surprising universal behavior in superconductors from the transition metal dichalcogenide (TMD) family. Specifically,
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gives rise to a weaker superconductivity. However, the exact value of Hc2 remains too high - due to a mechanism which is right now not understood.
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I think this result makes the TMD family, potentially, as useful model system. You can tune the strength of the superconductivity with fine resolution by moving across the TMD family and varying the thickness. This could be a useful know in future quantum devices.
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New publication: nature.com/articles/s41467-0… Superconductivity is one of the most fascinating phenomena ever observed. The general public typically associates it with absence of electrical resistance, which is indeed super cool and super useful. But there is actually much more>

The transition-metal-dichalcogenide family as a superconductor tuned by charge density wave strength

Nature Communications - By mapping the superconducting gap, the critical field, and temperature in the metallic H-TMD family of superconductors, the authors find a universal relationship that holds...

nature.com
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The Hebrew University deeply mourns the loss of Tzur Saidi, a distinguished graduate of the Faculty of Food and Environmental Agriculture. Tragically, he was a victim of terrorism during the Nature Festival in Ra'im. Our heartfelt condolences go out to his family and classmates during this difficult time. May his memory be a blessing.
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Very troubling practice by Dias, sending "cease and desist" letters to his students and to critics. Another retraction looms for embattled physicist behind blockbuster superconductivity claims | Science | AAAS science.org/content/article/…

Another retraction looms for embattled physicist behind blockbuster superconductivity claims

Ranga Dias’s co-authors request retraction after review raises questions about the credibility of the data

science.org
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Now on Nano Letters - a fully two-dimensional SQUID, built by placing two ultra-thin NbSe2 electrodes on graphene and graphite. pubs.acs.org/doi/10.1021/acs…

High Magnetic Field Stability in a Planar Graphene-NbSe2 SQUID

Abstract. Thin NbSe2 retains superconductivity at a high in-plane magnetic field up to 30 T. In this work we construct a novel atomically thin, all van der

pubs.acs.org
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We find 2 interesting things: 1. The current re-arranges to a narrow channel - somehow, there is a narrow channel which retains superconductivity - effectively immune to field! 2. The SQUID plane is NOT parallel to the graphene plane. The difference: 0.4 miliradians.
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We have applied two methods for reproducing the current map: A Monte Carlo style calculation, and a new trick using the correlation between the graphene and graphite channel.
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Cool new result on finding very thin hBN: See our new ACS Nano. Ronen Rapaport's lab invented a new ellipsometry with single layer sensitivity. See here how we can identify the fully transparent single layer hBN! pubs.acs.org/doi/10.1021/acs…
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The dancing vortices - see my previous tweet on our new vortex-control devices allowing, for the first time, to see vortex-braiding! pubs.acs.org/doi/10.1021/acs…
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Finally - out paper on vortex manipulation is published online in Nano Letters: pubs.acs.org/doi/10.1021/acs…

Chip-Integrated Vortex Manipulation

Abstract. The positions of Abrikosov vortices have long been considered as means to encode classical information. Although it is possible to move individua

pubs.acs.org
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We use Nb loops as vortex controls. They control vortices in an NbSe2 flakes placed above the loops (and insulated from them). The loops can pull a vortex from a distance of 3 microns, and push it reliably out.
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By successive push-pull operations, we carry out a braiding operation. This ability to make vortices dance by on-chip elements is new, and can be used in experiments for control of topological vortices.
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