Speaker: Dr. Ravi Kumar Bandapelli, Postdoctoral Research Associate, Department of Physics, 
         Carnegie Mellon University, Pittsburgh, PA, USA.

Title: "In-Plane Anomalous Hall Effect and Multidimensional Unidirectional Magnetoresistance in 
        Low-Symmetry van der Waals Heterostructures".

Date: Thursday, 5th November 2026 - Time: 4 PM

Venue: CeNSE Seminar Hall

Abstract:

Low-symmetry van der Waals heterostructures provide new routes to generate and electrically 
detect unconventional spin and magnetic responses. In this talk, I will present our observation 
of an in-plane anomalous Hall effect in TaIrTe4/Cr2Ge2Te6 heterostructures, where reduced crystal 
symmetry enables a Hall response sensitive to in-plane magnetization. I will then discuss 
multidimensional unidirectional magnetoresistance (UMR) arising from tilted spin polarization 
generated by TaIrTe4, enabling electrical detection of different magnetization orientations. 
Electrostatic gating strongly tunes these responses, including reversal of the UMR sign. 
These results establish symmetry engineering as a versatile approach for multidimensional 
magnetic-state readout in low-dimensional spintronic devices and architectures.

Biography:

Ravi Kumar Bandapelli is a Postdoctoral Research Associate in the Department of Physics at 
Carnegie Mellon University. His research focuses on experimental condensed-matter physics, 
spintronics, and low-dimensional van der Waals quantum materials, with emphasis on spin–orbit 
phenomena, magnetotransport, nanofabrication, and electrical detection of magnetic states. 
He previously held Dr. D. S. Kothari and Institute of Eminence postdoctoral fellowships at 
the Indian Institute of Science, Bengaluru. He received his Ph.D. in Physics from the University 
of Hyderabad. His current research explores symmetry-driven spin-charge conversion and unconventional 
magnetotransport phenomena in low-symmetry van der Waals heterostructures for future spintronic applications.

Host Faculty:  Prof. Manoj Varma