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Through the Lens of A Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in Two‐Dimensional Materials

Karni, Ouri and Esin, Iliya and Dani, Keshav M. (2022) Through the Lens of A Momentum Microscope: Viewing Light‐Induced Quantum Phenomena in Two‐Dimensional Materials. Advanced Materials . ISSN 0935-9648. doi:10.1002/adma.202204120. (In Press)

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Van der Waals (vdW) materials at their two-dimensional limit are diverse, flexible, and unique laboratories to study fundamental quantum phenomena and their future applications. Their novel properties rely on their pronounced Coulomb interactions, variety of crystal symmetries and spin-physics, and the ease of incorporation of different vdW materials to form sophisticated heterostructures. In particular, the excited state properties of many two-dimensional semiconductors and semi-metals are relevant for their technological applications, particularly those that can be induced by light. In this paper, we review the recent advances made in studying out-of-equilibrium, light-induced, phenomena in these materials using powerful, surface-sensitive, time-resolved photoemission-based techniques, with a particular emphasis on the emerging multi-dimensional photoemission spectroscopy technique of time-resolved momentum microscopy. We discuss the advances this technique has enabled in studying the nature and dynamics of occupied excited states in these materials. Then, we project for the future research directions opened by these scientific and instrumental advancements, studying the physics of two-dimensional materials and the opportunities to engineer their band-structure and band-topology by laser fields.

Item Type:Article
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URLURL TypeDescription
Karni, Ouri0000-0003-0118-7033
Esin, Iliya0000-0003-2959-0617
Dani, Keshav M.0000-0003-3917-6305
Additional Information:© 2022 John Wiley & Sons. Accepted manuscript online: 11 July 2022. Manuscript revised: 23 June 2022. Manuscript received: 06 May 2022. O.K. thanks the funding from the Koret Foundation, the AMOS program, Chemical Sciences, Geosciences, and Biosciences Division, Basic Energy Sciences, U.S. Department of Energy, and the Gordon and Betty Moore Foundation’s EPiQS Initiative through grant number GBMF9462. I.E. is grateful for support from the Simons Foundation and the Institute of Quantum Information and Matter. K.M.D. thanks the funding from the Femtosecond Spectroscopy Unit – Okinawa Institute of Science and Technology Graduate University, and the Okinawa Institute of Science and Technology Graduate University Innovative Technology Research – Proof of Concept Program. Competing Interests: K.M.D. is an inventor on a patent application related to this work filed by the Okinawa Institute of Science and Technology School Corporation (US 2020/0333559 A1 published on October 22, 2020). The authors declare no other competing interests.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Koret FoundationUNSPECIFIED
Lawrence Berkeley National LaboratoryUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Gordon and Betty Moore FoundationGBMF9462
Simons FoundationUNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Okinawa Institute of Science and TechnologyUNSPECIFIED
Subject Keywords:2D materials; angle-resolved photoemission spectroscopy; band-structure characterization; excitons; Floquet bands engineering; time-resolved momentum-microscopy; topological edge states
Record Number:CaltechAUTHORS:20220714-369415000
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Official Citation:Karni, O., Esin, I. and Dani, K.M. (2022), Through the Lens of A Momentum Microscope: Viewing Light-Induced Quantum Phenomena in Two-Dimensional Materials. Adv. Mater.. Accepted Author Manuscript 2204120.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115551
Deposited By: George Porter
Deposited On:14 Jul 2022 23:02
Last Modified:14 Jul 2022 23:02

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