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Raman study of Fano interference in p-type doped silicon
Materials Science · Submitted 27 Oct 2009
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The asymmetry in the one-phonon Raman lineshape is attributed to a Fano interference involving the overlap of a continuum of electronic excitations with a discrete phonon state.
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The abstract, sentence by sentence
As the silicon industry continues to push the limits of device dimensions, tools such as Raman spectroscopy are ideal to analyze and characterize the doped silicon channels. The effect of inter-valence band transitions on the zone center optical phonon in heavily p-type doped silicon is studied by Raman spectroscopy for a wide range of excitation wavelengths extending from the red (632.8 nm) into the ultra-violet (325 nm). The asymmetry in the one-phonon Raman lineshape is attributed to a Fano interference involving the overlap of a continuum of electronic excitations with a discrete phonon state. We identify a transition above and below the one-dimensional critical point (E = 3.4 eV) in the electronic excitation spectrum of silicon. The relationship between the anisotropic silicon band structure and the penetration depth is discussed in the context of possible device applications.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | As the silicon industry continues to push the limits of device dimensions, tools such as Raman spectroscopy are ideal to analyze and characterize the doped silicon channels. | background 1.00 | 0.05 | 0.02 | asserted 0.98 |
| s1 | The effect of inter-valence band transitions on the zone center optical phonon in heavily p-type doped silicon is studied by Raman spectroscopy for a wide range of excitation wavelengths extending from the red (632.8 nm) into the ultra-violet (325 nm). | contribution 0.82 | 0.95 | 0.07 | asserted 0.99 |
| s2 | The asymmetry in the one-phonon Raman lineshape is attributed to a Fano interference involving the overlap of a continuum of electronic excitations with a discrete phonon state. | interpretation 0.96 | 0.71 | 0.64 | asserted 1.00 |
| s3 | We identify a transition above and below the one-dimensional critical point (E = 3.4 eV) in the electronic excitation spectrum of silicon. | result 0.98 | 0.93 | 0.29 | asserted 1.00 |
| s4 | The relationship between the anisotropic silicon band structure and the penetration depth is discussed in the context of possible device applications. | interpretation 0.93 | 0.55 | 0.09 | asserted 0.47 |
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Original abstract
As the silicon industry continues to push the limits of device dimensions, tools such as Raman spectroscopy are ideal to analyze and characterize the doped silicon channels. The effect of inter-valence band transitions on the zone center optical phonon in heavily p-type doped silicon is studied by Raman spectroscopy for a wide range of excitation wavelengths extending from the red (632.8 nm) into the ultra-violet (325 nm). The asymmetry in the one-phonon Raman lineshape is attributed to a Fano interference involving the overlap of a continuum of electronic excitations with a discrete phonon state. We identify a transition above and below the one-dimensional critical point (E = 3.4 eV) in the electronic excitation spectrum of silicon. The relationship between the anisotropic silicon band structure and the penetration depth is discussed in the context of possible device applications.
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Another widely discussed phenomenon is the coupling between one phonon and a broad continuum [ref] in literature referred to as Auger-like resonant interference [ref] , Fano-interference [ref] or Breit-Wigner-Fano coupling [ref] .
Phonon-phonon coupling in bismuth vanadate over a large temperature range across the monoclinic phase · Introduction · 0.99
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