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Brad Ramshaw

Assistant Professor

Educational Background

BSc (Hons.)-Physics and computer science,University of British Columbia, 2002-2007. PhD-Physics, University of British Columbia, 2007-2012. Postdoctoral Researcher, Los Alamos National labs, National High Magnetic Field Lab, 2012-2015.  Staff Scientist, Los Alamos National Labs, National High Magnetic Field Lab, 2015-2016. Assistant Professor, Cornell University, Physics, 2017-present. Natural Sciences and Engineering Research Council Post-Graduate Scholarship-Doctorate, 2010. Martin and Beate Block Physics Award, Aspen Winter Conference, 2011. Postdoc Poster Award, Los Alamos National Labs, 2013. Director’s Fellow Postdoctoral Researcher, Los Alamos National Labs, 2013. Postdoc Publication Prize in Experimental Sciences, Los Alamos National Labs, 2015. Postdoc Publication Prize in Actinide Science, Los Alamos National Labs, 2016. Lee Osheroff Richardson Science Prize, 2017. Member, American Physical Society.

Website(s)

Overview

Our lab designs and builds unique experiments to probe the fundamental transport and thermodynamic properties of quantum materials—systems that exhibit non-trivial quantum phenomena. Current examples of our research include the identification of unique phases of matter in topological semimetals, uncovering broken symmetries in high-Tc superconductors using ultrasound, and probing topological superconductivity using the unique experimental technique of resonant ultrasound spectroscopy.

Departments/Programs

  • Physics

Graduate Fields

  • Physics

Affiliations

  • Laboratory of Atomic and Solid State Physics (LASSP)

Publications

[1] B. J. Ramshaw, N Harrison, SE Sebastian, S Ghannadzadeh, KA Modic, DA Bonn, WN Hardy, Ruixing Liang, and PA Goddard. Broken Rotational Symmetry on the Fermi Surface of a High-Tc Superconductor. NPJ Quantum Materials, 2, 2017

[2] B. J. Ramshaw, S. E. Sebastian, R. D. McDonald, James Day, B. S. Tan, Z. Zhu, J. B. Betts, Ruixing Liang, D. A. Bonn, W. N. Hardy, and N. Harrison. Quasiparticle Mass Enhancement Approaching Optimal Doping in a High-Tc Superconductor. Science, 348:317–320, 2015

[3] B. J. Ramshaw, Arkady Shekhter, Ross D. McDonald, Jon B. Betts, J. N. Mitchell, P. H. Tobash, C. H. Mielke, E. D. Bauer, and Albert Migliori. Avoided Valence Transition in a Plutonium Superconductor. Proceedings of the National Academy of Sciences, 112(11):3285–3289, 2015

[4] Philip JW Moll, Andrew C Potter, Nityan L Nair, B. J. Ramshaw, KA Modic, Scott Riggs, Bin Zeng, Nirmal J Ghimire, Eric D Bauer, Robert Kealhofer, Filip Ronning, and James G. Analytis. Magnetic Torque Anomaly in the Quantum Limit of Weyl Semimetals. Nature Communications, 7, 2016

[5] Akash V. Maharaj, Yi Zhang, B. J. Ramshaw, and S. A. Kivelson. Quantum Oscillations in a Bilayer With Broken Mirror Symmetry: A Minimal Model for YBa2Cu3O6+x. Phys. Rev. B, 93:094503, Mar 2016

[6] A. Shekhter, B. J. Ramshaw, R. D. McDonald, J. B. Betts, F. Balakirev, Ruixing Liang,W. N. Hardy, D. A. Bonn, Scott C. Riggs, and Albert Migliori. Bounding the Pseudogap With a Line of Phase Transitions in YBa2Cu3O6+x. Nature, 498(7452):75–77, 2013

[7] B. J. Ramshaw, Baptiste Vignolle, James Day, Ruixing Liang, W. N. Hardy, Cyril Proust, and D. A. Bonn. Angle Dependence of Quantum Oscillations in YBa2Cu3O6.59 Shows Free-Spin Behaviour of Quasiparticles. Nature Physics, 7(3):234–238, Mar 2011