Our research focuses on exploring the emergent phenomena that appear at interfaces, both literal and metaphorical. On the literal side, we are exploring magnetism and spin transport at the interface between magnetically ordered or spin polarized materials and nonmagnetic metals and semiconductors. This physical interface gives rise to phenomena not present in homogeneous bulk systems ranging from traditional spin injection, to magnetic-resonance driven spin pumping, to spin-thermal effects such as the spin Seebeck effect. 

Taking a more metaphorical view, we are also interested in the interface between Physics and Chemistry, in particular the study of magnetism and magnetic resonance in organic-based magnetic materials. For example, we are exploring the impact of metal and ligand substitution on the DC and microwave properties of organic-based magnetic materials, revealing anomalously high Curie temperatures (greater than 600 K) and extraordinarily narrow-linewidth (high quality factor, Q ~ 8,000) ferromagnetic resonances that rival the best inorganic materials (such as yttrium iron garnet, YIG). These high-Q resonances have potential applications in coherent magnonics ranging from non-reciprocal microwave devices, to magnonic crystals, to quantum information.

In addition to these established programs we have developing efforts in 2D materials, another literal interface where the material itself can be thought of as 100% interface, and DNA based nano-machines, a metaphorical interface between the precise control of DNA structure afforded by Biology and fundamental questions in nanoscience posed by Physics.

Our work is carried out within our laboratory, in several world class user facilities located on OSU's campus, and through a network of national and international collaborators. If you are interested in joining our research group, please feel free to contact Prof. Johnston-Halperin, one of our current students or postdocs, or any of our group alumni, to learn more about current opportunities. Potential students may also want to take a look at the PhD program within the Department of Physics or our APS and NSF sponsored MS to PhD Bridge Program.