Direct observation of the vanishing electron energy loss spectroscopy cross section in graphene

Alberto Guandalini; Ryosuke Senga; Yung Chang Lin; Kazu Suenaga; Paolo Barone; Francesco Mauri; Thomas Pichler; Christian Kramberger

doi:10.1103/PhysRevB.111.L041401

Direct observation of the vanishing electron energy loss spectroscopy cross section in graphene

Alberto Guandalini (Korresp. Autor*in)
, Ryosuke Senga
, Yung Chang Lin
, Kazu Suenaga
, Paolo Barone
, Francesco Mauri
, Thomas Pichler
, Christian Kramberger

Elektronische Materialeigenschaften

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

Abstract

In transmission electron energy loss (EEL) spectroscopy, the cross section in two dimensions (2D) is quenched by kinematic effects once the momentum transfer becomes smaller than a critical value set by qz, the momentum loss parallel to the beam. Our highly momentum (Δq=0.02Å-1) and energy (ΔE=45 meV) resolved setup is instrumental in delivering the experimental verification of quenched 2D EEL spectra on freestanding graphene at momentum transfers q below 0.06Å-1. We retrieve the intrinsic uniform dielectric response of graphene from measured spectra by quantifying the kinematic suppression.

Originalsprache	Englisch
Aufsatznummer	L041401
Seitenumfang	6
Fachzeitschrift	Physical Review B
Jahrgang	111
Ausgabenummer	4
DOIs	https://doi.org/10.1103/PhysRevB.111.L041401 https://doi.org/10.48550/arXiv.2406.02998
Publikationsstatus	Veröffentlicht - 14 Jan. 2025

Fördermittel

R.S. and K.S. acknowledges the support for JST-CREST (JPMJCR20B1, JPMJCR20B5, JPMJCR1993). This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programe (MORE-TEM ERC-SYN project, Grant Agreement No. 951215). R.S. acknowledges the support for JST-PRESTO (JPMJPR2009). Acknowledgments. R.S. and K.S. acknowledges the support for JST-CREST (JPMJCR20B1, JPMJCR20B5, JPMJCR1993). This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programe (MORE-TEM ERC-SYN project, Grant Agreement No. 951215). R.S. acknowledges the support for JST-PRESTO (JPMJPR2009).

ÖFOS 2012

103018 Materialphysik
103009 Festkörperphysik
103020 Oberflächenphysik

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1 Laufend

MORE-TEM: MOmentum and position REsolved mapping Transmission Electron energy loss Microscope
Pichler, T. (Projektleiter*in)
1/05/21 → 30/04/28
Projekt: Forschungsförderung

Zitationsweisen

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title = "Direct observation of the vanishing electron energy loss spectroscopy cross section in graphene",

abstract = "In transmission electron energy loss (EEL) spectroscopy, the cross section in two dimensions (2D) is quenched by kinematic effects once the momentum transfer becomes smaller than a critical value set by qz, the momentum loss parallel to the beam. Our highly momentum (Δq=0.02{\AA}-1) and energy (ΔE=45 meV) resolved setup is instrumental in delivering the experimental verification of quenched 2D EEL spectra on freestanding graphene at momentum transfers q below 0.06{\AA}-1. We retrieve the intrinsic uniform dielectric response of graphene from measured spectra by quantifying the kinematic suppression.",

author = "Alberto Guandalini and Ryosuke Senga and Lin, \{Yung Chang\} and Kazu Suenaga and Paolo Barone and Francesco Mauri and Thomas Pichler and Christian Kramberger",

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AU - Guandalini, Alberto

AU - Senga, Ryosuke

AU - Lin, Yung Chang

AU - Suenaga, Kazu

AU - Barone, Paolo

AU - Mauri, Francesco

AU - Pichler, Thomas

AU - Kramberger, Christian

PY - 2025/1/14

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N2 - In transmission electron energy loss (EEL) spectroscopy, the cross section in two dimensions (2D) is quenched by kinematic effects once the momentum transfer becomes smaller than a critical value set by qz, the momentum loss parallel to the beam. Our highly momentum (Δq=0.02Å-1) and energy (ΔE=45 meV) resolved setup is instrumental in delivering the experimental verification of quenched 2D EEL spectra on freestanding graphene at momentum transfers q below 0.06Å-1. We retrieve the intrinsic uniform dielectric response of graphene from measured spectra by quantifying the kinematic suppression.

AB - In transmission electron energy loss (EEL) spectroscopy, the cross section in two dimensions (2D) is quenched by kinematic effects once the momentum transfer becomes smaller than a critical value set by qz, the momentum loss parallel to the beam. Our highly momentum (Δq=0.02Å-1) and energy (ΔE=45 meV) resolved setup is instrumental in delivering the experimental verification of quenched 2D EEL spectra on freestanding graphene at momentum transfers q below 0.06Å-1. We retrieve the intrinsic uniform dielectric response of graphene from measured spectra by quantifying the kinematic suppression.

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DO - 10.1103/PhysRevB.111.L041401

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SN - 2469-9950

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JO - Physical Review B

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IS - 4

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Direct observation of the vanishing electron energy loss spectroscopy cross section in graphene

Abstract

Fördermittel

ÖFOS 2012

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Projekte

MORE-TEM: MOmentum and position REsolved mapping Transmission Electron energy loss Microscope

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