Secondary Electron Emission by Plasmon-Induced Symmetry Breaking in Highly Oriented Pyrolytic Graphite
Two-particle spectroscopy with correlated electron pairs is used to establish the causal link between the secondary electron spectrum, the ( π + σ ) plasmon peak, and the unoccupied band structure of highly oriented pyrolytic graphite. The plasmon spectrum is resolved with respect to the involved in...
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creator | Werner, Wolfgang S. M. Astašauskas, Vytautas Ziegler, Philipp Bellissimo, Alessandra Stefani, Giovanni Linhart, Lukas Libisch, Florian |
description | Two-particle spectroscopy with correlated electron pairs is used to establish the causal link between the secondary electron spectrum, the ( π + σ ) plasmon peak, and the unoccupied band structure of highly oriented pyrolytic graphite. The plasmon spectrum is resolved with respect to the involved interband transitions and clearly exhibits final state effects, in particular due to the energy gap between the interlayer resonances along the ΓA direction. The corresponding final state effects can also be identified in the secondary electron spectrum. Interpretation of the results is performed on the basis of density-functional theory and tight-binding calculations. Excitation of the plasmon perturbs the symmetry of the system and leads to hybridization of the interlayer resonances with atomlike σ ∗ bands along the Γ A direction. These hybrid states have a high density of states as well as sufficient mobility along the graphite c axis leading to the sharp ~ 3 eV resonance in the spectrum of emitted secondary electrons reported throughout the literature. |
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M. ; Astašauskas, Vytautas ; Ziegler, Philipp ; Bellissimo, Alessandra ; Stefani, Giovanni ; Linhart, Lukas ; Libisch, Florian</creator><creatorcontrib>Werner, Wolfgang S. M. ; Astašauskas, Vytautas ; Ziegler, Philipp ; Bellissimo, Alessandra ; Stefani, Giovanni ; Linhart, Lukas ; Libisch, Florian</creatorcontrib><description>Two-particle spectroscopy with correlated electron pairs is used to establish the causal link between the secondary electron spectrum, the ( π + σ ) plasmon peak, and the unoccupied band structure of highly oriented pyrolytic graphite. The plasmon spectrum is resolved with respect to the involved interband transitions and clearly exhibits final state effects, in particular due to the energy gap between the interlayer resonances along the ΓA direction. The corresponding final state effects can also be identified in the secondary electron spectrum. Interpretation of the results is performed on the basis of density-functional theory and tight-binding calculations. Excitation of the plasmon perturbs the symmetry of the system and leads to hybridization of the interlayer resonances with atomlike σ ∗ bands along the Γ A direction. 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The corresponding final state effects can also be identified in the secondary electron spectrum. Interpretation of the results is performed on the basis of density-functional theory and tight-binding calculations. Excitation of the plasmon perturbs the symmetry of the system and leads to hybridization of the interlayer resonances with atomlike σ ∗ bands along the Γ A direction. These hybrid states have a high density of states as well as sufficient mobility along the graphite c axis leading to the sharp ~ 3 eV resonance in the spectrum of emitted secondary electrons reported throughout the literature.</description><subject>Broken symmetry</subject><subject>Density functional theory</subject><subject>Electron emission</subject><subject>Electrons</subject><subject>Energy gap</subject><subject>Graphite</subject><subject>Interlayers</subject><subject>Pyrolytic graphite</subject><subject>Spectrum analysis</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNpdkE1LAzEURYMoWKt_QQbcuJn6MpmvLLXUtlBosboe0sybNnUmqUkqzL83pS7E1XuLw-XeQ8g9hRGlwJ5Wu9694fcCvR_RJBtRnufALsiAQsHjgtL0kgwAGI05QHFNbpzbAwBN8nJAmjVKo2th-2jSovTW6GjSKedUeDZ9tGqF64yO57o-Sqyjdd916AP9YlF8Kr2NlI5martr-2hpFWofoFVvTdt7JaOpFYed8nhLrhrROrz7vUPy8Tp5H8_ixXI6Hz8vYslo7mPGhUhTjqF0kYkSc7ZJWMmQZViGHTQMEFhn9YbRRgCUWSCbugbJWdPIhLMheTznHqz5OqLzVdgisW2FRnN0VZLmDHiZ5Sf04R-6N0erQ7sTxcsUaEEDlZ8paY1zFpvqYFUXdFUUqpP-6o_-KuivzvrZD3bcfDw</recordid><startdate>20201106</startdate><enddate>20201106</enddate><creator>Werner, Wolfgang S. 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M.</creatorcontrib><creatorcontrib>Astašauskas, Vytautas</creatorcontrib><creatorcontrib>Ziegler, Philipp</creatorcontrib><creatorcontrib>Bellissimo, Alessandra</creatorcontrib><creatorcontrib>Stefani, Giovanni</creatorcontrib><creatorcontrib>Linhart, Lukas</creatorcontrib><creatorcontrib>Libisch, Florian</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Werner, Wolfgang S. M.</au><au>Astašauskas, Vytautas</au><au>Ziegler, Philipp</au><au>Bellissimo, Alessandra</au><au>Stefani, Giovanni</au><au>Linhart, Lukas</au><au>Libisch, Florian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Secondary Electron Emission by Plasmon-Induced Symmetry Breaking in Highly Oriented Pyrolytic Graphite</atitle><jtitle>Physical review letters</jtitle><date>2020-11-06</date><risdate>2020</risdate><volume>125</volume><issue>19</issue><spage>1</spage><epage>196603</epage><pages>1-196603</pages><artnum>196603</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>Two-particle spectroscopy with correlated electron pairs is used to establish the causal link between the secondary electron spectrum, the ( π + σ ) plasmon peak, and the unoccupied band structure of highly oriented pyrolytic graphite. The plasmon spectrum is resolved with respect to the involved interband transitions and clearly exhibits final state effects, in particular due to the energy gap between the interlayer resonances along the ΓA direction. The corresponding final state effects can also be identified in the secondary electron spectrum. Interpretation of the results is performed on the basis of density-functional theory and tight-binding calculations. Excitation of the plasmon perturbs the symmetry of the system and leads to hybridization of the interlayer resonances with atomlike σ ∗ bands along the Γ A direction. These hybrid states have a high density of states as well as sufficient mobility along the graphite c axis leading to the sharp ~ 3 eV resonance in the spectrum of emitted secondary electrons reported throughout the literature.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevLett.125.196603</doi><orcidid>https://orcid.org/0000-0002-6756-8368</orcidid><orcidid>https://orcid.org/0000-0003-0992-8430</orcidid><orcidid>https://orcid.org/0000-0001-8504-2848</orcidid><orcidid>https://orcid.org/0000-0002-2739-2732</orcidid><orcidid>https://orcid.org/0000-0001-5641-9458</orcidid><orcidid>https://orcid.org/0000-0002-4870-9137</orcidid><orcidid>https://orcid.org/0000-0001-5370-5643</orcidid></addata></record> |
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subjects | Broken symmetry Density functional theory Electron emission Electrons Energy gap Graphite Interlayers Pyrolytic graphite Spectrum analysis |
title | Secondary Electron Emission by Plasmon-Induced Symmetry Breaking in Highly Oriented Pyrolytic Graphite |
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