News

Our paper “Quantifying NV-center Spectral Diffusion by Symmetry” by Brendan McCullian, Harry Cheung, Huiyao Chen, and Greg Fuchs is now available on the the arXiv.

Dr. Jae-Pil So has joined as a postdoc.  Welcome!

Our paper “Excited-state spin-resonance spectroscopy of V_B^– defect centers in hexagonal boron nitride” by N. Mathur, A. Mukherjee, X. Gao, J. Luo, B. A. McCullian, T. Li, A. N. Vamivakas, and G. D. Fuchs is now out at Nature Communications.

Harry defended his thesis “Study of High Quality Factor Resonators” and has been awarded a Ph.D. in Physics.  Congratulate him!!

Our paper “Excited-state spin-resonance spectroscopy of V_B^- defect centers in hexagonal boron nitride” by N. Mathur, A. Mukherjee, X. Gao, J. Luo, B. A. McCullian, T. Li, A. N. Vamivakas, and G. D. Fuchs has now been posted to the arXiv.

The Cornell Chronicle covered our recent award from the Department of Energy to advance Quantum Information Science in collaboration with Dan Ralph (Cornell Physics), Ezekiel Johnston-Halperin (Ohio State U.), and Michael Flattè (U. Iowa).  Check it out: https://news.cornell.edu/stories/2021/08/researchers-receive-54m-advance-quantum-science

The Cornell Chronicle coverage of our recent near-field magneto-thermal microscopy paper: Magneto-thermal imaging brings synchrotron capabilities to the lab.

Our Paper “Nanoscale Magnetization and Current Imaging Using Time-Resolved Scanning-Probe Magnetothermal Microscopy,” by Chi Zhang, Jason Bartell, Jonathan Karsch, Isaiah Gray and Gregory Fuchs is now out at Nano Letters. 

We have recently posted two new papers to the arXiv:

• “Raman Spectroscopy and Aging of the Low-Loss Ferrimagnet Vanadium Tetracyanoethylene” by H. F. H. Cheung, M. Chilcote, H. Yusuf, D. S. Cormode, Y. Shi, M. E. Flatté, E. Johnston-Halperin, and G. D. Fuchs.  Here we use Raman spectrocopy correlated with ferromagnetic resonance and SQUID magnetometry to understand the processes that lead to chemical breakdown of the low-loss ferrimagnet V[TCNE]2.  This material is exciting for coherent magnonics and quantum magnonics (see some ideas discussed here).
• “Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy” by Chi Zhang, Jason M. Bartell, Jonathan C. Karsch, Isaiah Gray, and Gregory D. Fuchs.  Here we demonstrate a near-field scanning magneto-thermal microscope.  This instrument can image both magnetization and current density with 100 nm scale spatial resolution and sub-100 ps scale temporal resolution.  This is exciting because there is a dearth of magnetic microscopies that combine these two capabilities, and the ones that exist are mainly beamline techniques.  Our approach is a table-top microscopy and comparably low cost.

Our paper, “Operando Control of Skyrmion Density in a Lorentz Transmission Electron Microscope with Current Pulses,” by A. M. Park, Z. Chen, X. S. Zhang, L. Zhu, D. A. Muller, and G. D. Fuchs has now been published in the Journal of Applied Physics.  Congratulations Albert!