We are featured in an article in the Cornell Chronicle: Graphene sensors find subtleties in magnetic fields
Our work "Magnetic field detection limits for ultraclean graphene Hall sensors" is published in Nature Communications today!
The preprint is here: https://arxiv.org/abs/1912.12678
The preprint is here: https://arxiv.org/abs/1910.12929
The paper is here: https://science.sciencemag.org/content/366/6462/221 .
You can also read about it in the Cornell Chronicle: https://news.cornell.edu/stories/2019/10/stressing-metallic-material-con... .
Kristen is an undergraduate researcher in the lab. She is going to work on implementing a microwave readout for our SQUIDs.
We are obtaining first images from a calibration sample using a home-built and brand new microscope inside our Bluefors dilution refrigerator! The left image is a DC magnetic image. The calibration sample has a meander made from Niobium. The lines are visible due to the Meissner effect screening the background magnetic field. A few vortices are visible as well. We flow an ac current through the meander at the same time. The right image is taken with a lock-in amplifier and shows the magnetic flux due to the current. Image is taken at 50mK. Stay tuned for even cooler images :)
Enjoying dinner at Cochon in New Orleans. Thanks to Greg Stiehl for taking the picture!
Rachel Resnick, a sophomore in Applied & Engineering Physics, has joined our lab. Welcome!
Check out this feature https://research.cornell.edu/news-features/squids-toolbox-sensors !
© 2015 Katja Nowack
Physics Department
Lab of Atomic & Solid State Physics
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