Jyoti Katoch

Assistant Professor Carnegie Mellon University

  • Pittsburgh PA

Jyoti Katoch investigates the electronic, optical and spin dependent properties of novel quantum systems.

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Carnegie Mellon University

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Biography

Jyoti Katoch investigates the electronic, optical and spin dependent properties of novel quantum systems such as two-dimensional layered materials and three-dimensional Dirac semimetals. She has expertise in controlling the properties of quantum materials using atomic scale modifications (adatoms, heterostructures, proximity effects, etc.) with an intent to tweak their properties on demand, as well as explore novel physical phenomena emerging from such modifications. Her research focuses on using two different experimental approaches for the fabrication of novel quantum systems: polymer-based mechanical assembly techniques to obtain atomically precise heterostructures of van der Waals materials and molecular beam epitaxy growth method for larger area thin films of quantum materials. Her group utilizes the state-of-the-art in-operando angle-resolved photoemission spectroscopy with sub 100 nm spatial resolution (nanoARPES) to obtain momentum resolved view of the electronic structure of fully functional devices based on quantum materials.

Areas of Expertise

Quantum Materials
Quantum Systems
Photolithography
Atomic Force Microscopy (AFM)
Molecular Beam Epitaxy Growth Method
Polymer-based Mechanical Assembly Techniques

Media Appearances

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."

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Accomplishments

DOE Early Career Research Award

2019

Education

University of Central Florida

Ph.D.

Physics

Panjab University

B.S

Physics, Mathematics and Chemistry

Languages

  • English
  • Hindi

Articles

In Operando Angle‐Resolved Photoemission Spectroscopy with Nanoscale Spatial Resolution: Spatial Mapping of the Electronic Structure of Twisted Bilayer Graphene

Small Science

2021

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.

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Accessing the spectral function in a current-carrying device

Physical Review Letters

2020

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.

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Momentum-resolved view of highly tunable many-body effects in a graphene/hBN field-effect device

Physical Review B

2020

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.

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