Jyoti Katoch
Assistant Professor
- Pittsburgh PA UNITED STATES
Jyoti Katoch investigates the electronic, optical and spin dependent properties of novel quantum systems.
Biography
Areas of Expertise
Media Appearances
A 100-Year-Old Physics Effect Doesn't Work How We Thought It Did, Study Finds
Science alert online
2026-09-20
"This truly demonstrates the power of building atomically precise heterostructures of emergent two-dimensional quantum materials to obtain on-demand electronic and magnetic properties," says physicist Jyoti Katoch from Carnegie Mellon University.
Carnegie Mellon's Jyoti Katoch Receives DOE Early Career Grant to Probe Quantum Matter
Carnegie Mellon University online
2019-08-01
"I am very excited about receiving a DOE early career research award," said Katoch, "It will enable my research group to perform cutting edge work on 2D quantum materials at the state-of-the-art MAESTRO beamline at the Advanced Light Source at Lawrence Berkeley National Laboratory. This award gives LIQUID group members an opportunity to venture into a new direction of performing in-operando angle-resolved photoemission spectroscopy with sub-100 nm spatial resolution on fully functional quantum devices at this beamline."
Media
Social
Accomplishments
DOE Early Career Research Award
2019
Education
Panjab University
B.S
Physics, Mathematics and Chemistry
University of Central Florida
Ph.D.
Physics
Languages
- English
- Hindi
Articles
In-plane anomalous Hall effect in a low-dimensional system
Nature MaterialsI-Hsuan Kao, Ravi Kumar Bandapelli, Zhenhong Cui, Shuchen Zhang, Jian Tang, Tiema Qian, Souvik Sasmal, Aalok Tiwari, Mei-Tung Chen, Raghvendra Posti, Rahul Rao, Jiahan Li, James H Edgar, Kenji Watanabe, Takashi Taniguchi, Ni Ni, Su-Yang Xu, Qiong Ma, Shubhayu Chatterjee, Jyoti Katoch, Simranjeet Singh
2026-05-28
The anomalous Hall effect (AHE) in magnetic systems is typically governed by symmetry constraints that require the Hall response to be proportional to the out-of-plane magnetization component. Here we demonstrate the emergence of an unconventional in-plane AHE in a low-dimensional heterostructure.
Unconventional unidirectional magnetoresistance in heterostructures of a topological semimetal and a ferromagnet
Nature MaterialsI Kao, Junyu Tang, Gabriel Calderon Ortiz, Menglin Zhu, Sean Yuan, Rahul Rao, Jiahan Li, James H Edgar, Jiaqiang Yan, David G Mandrus, Kenji Watanabe, Takashi Taniguchi, Jinwoo Hwang, Ran Cheng, Jyoti Katoch, Simranjeet Singh
2025-03-21
Unidirectional magnetoresistance (UMR) in a bilayer heterostructure, consisting of a spin-source material and a magnetic layer, refers to a change in the longitudinal resistance on the reversal of magnetization and originates from the interaction of non-equilibrium spin accumulation and magnetization at the interface. Since the spin polarization of an electric-field-induced non-equilibrium spin accumulation in conventional spin-source materials is restricted to be in the film plane, the ensuing UMR can only respond to the in-plane component of magnetization.
Observation of interlayer plasmon polaron in graphene/WS2 heterostructures
Nature CommunicationsSøren Ulstrup, Yann in’t Veld, Jill A Miwa, Alfred JH Jones, Kathleen M McCreary, Jeremy T Robinson, Berend T Jonker, Simranjeet Singh, Roland J Koch, Eli Rotenberg, Aaron Bostwick, Chris Jozwiak, Malte Rösner, Jyoti Katoch
2024-05-08
Harnessing electronic excitations involving coherent coupling to bosonic modes is essential for the design and control of emergent phenomena in quantum materials. In situations where charge carriers induce a lattice distortion due to the electron-phonon interaction, the conducting states get “dressed", which leads to the formation of polaronic quasiparticles.
Deterministic switching of a perpendicularly polarized magnet using unconventional spin–orbit torques in WTe2
Nature materialsI-Hsuan Kao, Ryan Muzzio, Hantao Zhang, Menglin Zhu, Jacob Gobbo, Sean Yuan, Daniel Weber, Rahul Rao, Jiahan Li, James H Edgar, Joshua E Goldberger, Jiaqiang Yan, David G Mandrus, Jinwoo Hwang, Ran Cheng, Jyoti Katoch, Simranjeet Singh
2022-06-16
Spin–orbit torque (SOT)-driven deterministic control of the magnetic state of a ferromagnet with perpendicular magnetic anisotropy is key to next-generation spintronic applications including non-volatile, ultrafast and energy-efficient data-storage devices. However, field-free deterministic switching of perpendicular magnetization remains a challenge because it requires an out-of-plane antidamping torque, which is not allowed in conventional spin-source materials such as heavy metals and topological insulators due to the system’s symmetry.
In Operando Angle‐Resolved Photoemission Spectroscopy with Nanoscale Spatial Resolution: Spatial Mapping of the Electronic Structure of Twisted Bilayer Graphene
Small Science2021
To pinpoint the electronic and structural mechanisms that affect intrinsic and extrinsic performance limits of 2D material devices, it is of critical importance to resolve the electronic properties on the mesoscopic length scale of such devices under operating conditions. Herein, angle‐resolved photoemission spectroscopy with nanoscale spatial resolution (nanoARPES) is used to map the quasiparticle electronic structure of a twisted bilayer graphene device.
Observation of electrically tunable van Hove singularities in twisted bilayer graphene from NanoARPES
Advanced Materials2020
The possibility of triggering correlated phenomena by placing a singularity of the density of states near the Fermi energy remains an intriguing avenue toward engineering the properties of quantum materials. Twisted bilayer graphene is a key material in this regard because the superlattice produced by the rotated graphene layers introduces a van Hove singularity and flat bands near the Fermi energy that cause the emergence of numerous correlated phases, including superconductivity. Direct demonstration of electrostatic control of the superlattice bands over a wide energy range has, so far, been critically missing.
Direct observation of minibands in a twisted graphene/WS2 bilayer
Science Advances2020
Stacking two-dimensional (2D) van der Waals materials with different interlayer atomic registry in a heterobilayer causes the formation of a long-range periodic superlattice that may bestow the heterostructure with properties such as new quantum fractal states or superconductivity. Recent optical measurements of transition metal dichalcogenide (TMD) heterobilayers have revealed the presence of hybridized interlayer electron-hole pair excitations at energies defined by the superlattice potential. The corresponding quasiparticle band structures, so-called minibands, have remained elusive, and no such features have been reported for heterobilayers composed of a TMD and another type of 2D material.
Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device
Physical Review B2020
Integrating the carrier tunability of a functional two-dimensional material electronic device with a direct probe of energy-and momentum-resolved electronic excitations is essential to gain insights on how many-body interactions are influenced during device operation. Here, we use microfocused angle-resolved photoemission in order to analyze many-body interactions in back-gated graphene supported on hexagonal boron nitride. By extracting the doping-dependent quasiparticle dispersion and self-energy, we observe how these interactions renormalize the Dirac cone and impact the electron mobility of our device.
Accessing the spectral function in a current-carrying device
Physical Review Letters2020
The presence of an electrical transport current in a material is one of the simplest and most important realizations of nonequilibrium physics. The current density breaks the crystalline symmetry and can give rise to dramatic phenomena, such as sliding charge density waves, insulator-to-metal transitions, or gap openings in topologically protected states. Almost nothing is known about how a current influences the electron spectral function, which characterizes most of the solid’s electronic, optical, and chemical properties.