I am an NSF Graduate Research Fellow in the Institute for Quantum Matter at The Johns Hopkins University where I am a Doctoral Candidate in Physics working with Professor Collin L. Broholm. We use neutron scattering, complemented by theory and other experimental techniques, to understand how magnetic and electronic structure influence the dynamical properties of quantum materialsFrom July 2016 through July 2017, I will be a Visiting Researcher at the Massachusetts Institute for Technology working with Professor Nuh Gedik. The Gedik Lab develops advanced optical spectroscopies, such as time-resolved angle-resolved photoemission, to understand aspects of quantum materials which compliment neutron scattering. 
Both the Broholm and Gedik groups' research are supported by a Moore Experimental Investigator award from the Gordon and Betty Moore Foundation. 

Topological properties of magnetism and electronic band structure are my guiding interests. An example system is a “skyrmion crystal”, where the magnetization on an atomic lattice forms a stable superstructure of topological defects with spins that point in every direction on the unit sphere. The same mathematical object can appear in a different context ("momentum space" in physics-speak) and lead to a new phase of matter called Weyl semimetals. Besides their fundamental import, the diverse class of topological materials have potential for futuristic applications ranging from improved magnetic memory to novel spintronic devices due to their robustness to certain kinds of disorder. I am also active in the development of pump-probe techniques for neutron scattering, which would open an exciting new way of exploring the non-equilibrium properties quantum materials. Stay tuned for several forthcoming publications on these topics! 
For more details about my work, you can read this focus piece from Forbes Magazine for a layperson's introduction or refer to my Research page.

My undergraduate work at Wesleyan University ranged from experimental fluid dynamics to topics in theoretical ion trap physics, both of which I discuss in this interview. My experimental work in fluid dynamics, cited for the APS Leroy Apker Award, demonstrated novel measurements of the rotational dynamics of anisotropic particles that I designed and fabricated using 3D printing. The new class of techniques we introduced for measuring Lagrangian statistics of ellipsoidal particles may also have exciting applications in measuring knotted vortices in fluid dynamics.

I remain connected to the role science plays in society through outreach to local schools and by contributing articles as an independent science consultant to OZY.com


Recent Updates

  • Visiting Researcher in Gedik Group at MIT Beginning in July 2016, I will have the pleasure of visiting Nuh Gedik's research group at the Massachusetts Institute of Technology in Cambridge, MA for a full year. The ...
    Posted May 25, 2016, 6:08 AM by Guy Marcus
  • Cu2OSeO3 at March Meeting 2016 Come check out my talk on the insulating skyrmion compound Cu2OSeO3 this Thursday, March 17th (details below). I will discuss some of our extensive neutron scattering experiments focusing on the ...
    Posted Mar 13, 2016, 7:32 PM by Guy Marcus
  • Quantum Matter---changing the world? Or changed the world? I recently talked with Hilary Bruek, contributor to Forbes Magazine, about the role quantum matter plays in our daily lives and why it keeps me coming ...
    Posted Feb 26, 2016, 11:15 AM by Guy Marcus
  • Forbes 30 Under 30 Summit: Israel Following the composition of the Forbes 30 Under 30 in Science and other categories, the Forbes Summit Group hosts a conference with attendees culled from awardees, mentors, and relevant public ...
    Posted Jan 10, 2016, 9:47 AM by Guy Marcus
  • Invited talk: Connecting exotic magnetism with electronic bandstructure I will be visiting MIT this Tuesday to deliver a talk for the Gedik Group about my ongoing work using neutron scattering to disentangle complex magnetic structures. CeAuSb2 represents ...
    Posted Dec 6, 2015, 5:52 PM by Guy Marcus
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