Research Interests: Magnetism and Superconductivity in Oxides

Complex oxides such as perovskite manganese oxides (manganites) and high critical temperature (Tc) cuprate superconductors form one of the most fascinating systems in condensed matter physics due to the challenges they pose to our understanding of fundamental phenomena and the potential for applications. Competing ground states are characteristic to these materials. Combined with the built in disorder found in such multi-element compounds, these competing ground states give rise to the inherent complexity and the unique properties of these materials

Our research program includes both sample preparation and measurement and students are trained in different aspects of condensed matter physics research. Undergraduate and graduate students work in teams on instruments such as pulsed laser thin film deposition systems, superconducting magnets, nanofabrication facilities, and scanning probe microscopes. We study material properties at cryogenic temperatures down to 1.5 K and magnetic fields up to 33 T using custom-built tools, focusing on emergent interfacial phenomena in magnetic and high–spin-orbit coupling systems. The overarching focus of our research is to investigate the ability to control magnetism in materials using electric fields; the so-called “magnetoelectric effect.”

Recent Research Highlights: Over the past decade, condensed matter physics has increasingly focused on two-dimensional and topological materials. The Biswas group is currently transitioning toward this frontier, focusing on the unique physical phenomena that emerge at interfaces between different materials. To facilitate this transition, over the past five years, we have prioritized improving sample quality by optimizing substrate preparation and refining thin-film growth parameters to grow ultra-clean thin films. To investigate the properties of these thin films at the nanometer scale, we are employing advanced tools such as neutron scattering and infrared nanoscopy.

Recent Student Mentoring and Success: Graduate students in the Biswas group are guided through complex research projects, which have consistently resulted in student-led publications in high-quality journals and successful career placements. We facilitate high-impact experiential learning through undergraduate research which has led to exceptional student achievements, including Goldwater Scholarships and University Scholars.