Electron energy loss spectra and optical constants of Bismuth

Wehenkel, C.; Gauthé, B.

doi:10.1016/0038-1098(74)91141-7

Cited by 16 publications

(12 citation statements)

References 9 publications

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“…This peak is observed as a shoulder in the experimental spectrum of Ref. [23] and was clearly resolved in other measurements [18,[20][21][22]. As will be discussed later in Sec.…”

Section: Comparison With Experiments In Large Energy Range (Up To 100 Ev)supporting

confidence: 65%

“…At finite transferred momenta, EEL spectra have not been studied, neither theoretically nor experimentally. For vanishing transferred momentum, the EEL spectrum has been studied for bulk bismuth experimentally [17][18][19][20][21][22][23], and there is only one, to the best of our knowledge, theoretical study which was performed by using the randomphase approximation (RPA) [11]. More recently, Bi nanostructures were studied experimentally [24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Ab initiostudy of electron energy loss spectra of bulk bismuth up to 100 eV

et al. 2017

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The dynamical charge-density response of bulk bismuth has been studied within time-dependent density functional perturbation theory, explicitly accounting for spin-orbit coupling. The use of the Liouville-Lanczos approach allows us to calculate electron energy loss spectra for excitation energies as large as 100 eV. Effects of 5d semicore electronic states, spin-orbit coupling, exchange and correlation, local fields, and anisotropy are thoroughly investigated. The account of the 5d states in the calculation turns out to be crucial to correctly describe the loss spectra above 10 eV and, in particular, the position and shape of the bulk-plasmon peak at 14.0 eV at vanishing transferred momentum. Our calculations reveal the presence of interband transitions at 16.3 eV, which had never been discussed before. The origin of the peak at 5.8 eV is revisited as due to mixed interband and collective excitations. Finally, our study supplements the lack of experiments at finite transferred momenta.

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“…This peak is observed as a shoulder in the experimental spectrum of Ref. [23] and was clearly resolved in other measurements [18,[20][21][22]. As will be discussed later in Sec.…”

Section: Comparison With Experiments In Large Energy Range (Up To 100 Ev)supporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Ab initiostudy of electron energy loss spectra of bulk bismuth up to 100 eV

et al. 2017

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“…While silver is characterized by a large density of free electrons, a rather large gap for interband transitions ͑transition edge from the d band of 3.9 eV͒, and a plasmon frequency for the bulk material corresponding to 3.8 eV, 14 bismuth is a semimetal with a relatively low density of free electrons, an overlap of the valence and conduction bands of 0.38 meV, 15 and a plasmon resonance at 14 eV. 16 The investigations were carried out at different levels of the laser excitation with the upper limit just below the onset of irreversible structural changes in the sample. Our samples consisted of nanowires with well defined orientation, random spacing, and relatively high density.…”

Section: Introductionmentioning

confidence: 99%

Laser-excited acoustic oscillations in silver and bismuth nanowires

et al. 2007

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Coherent acoustic oscillations in Bi and Ag nanowire samples were studied with a femtosecond pump-probe technique and detection of the scattered light. The observed optical and acoustic properties reflect the nano-structure of these materials. The electronic and lattice contributions to the excitation of coherent acoustic phonons are described using a two-temperature model. The excitation is performed at different laser fluences, and the high density of optically induced excitations modifies the state of the lattice. A transient state with softening of the lattice was observed in Ag nanowire samples. DOI: 10.1103/PhysRevB.76.184301 PACS numbers: 43.35.d, 42.25.Bs, 42.50.Md, 42.62.b I

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“…[10][11][12] The condition for resonance at planar interfaces between two materials A and B is 1A ()ϩ 1B ()ϭ0. 1 While the dielectric functions for the bismuth nanowires and templates have not been determined, 5.5 eV is a reasonable energy to expect for an interface plasmon based on the bismuth 21 and alumina 22 bulk values.…”

Section: Resultsmentioning

confidence: 97%

“…The largest feature in the loss spectrum is ascribed to the volume plasmon, which has a value of ϳ14 eV for bulk bismuth. 21 Two higher-energy loss events are those discernible at ϳ26 and ϳ29 eV, and these are identified as the O 4,5 ionization edges. There is no significant contribution to the spectrum from the 10 eV surface plasmon of bulk bismuth.…”

Section: Resultsmentioning

confidence: 99%

Plasmon excitation modes in nanowire arrays

Sander

Gronsky

Lin

et al. 2001

Journal of Applied Physics

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Electron energy loss spectrometry and energy-filtered transmission electron microscopy reveal characteristic plasmon excitations in both isolated Bi nanowires and an array of Bi nanowires within an Al 2 O 3 matrix. As the average nanowire diameter decreases from 90 to 35 nm, both the volume plasmon energy and peak width increase. In addition, a lower-energy excitation is present in a very localized region at the Bi-Al 2 O 3 interface. These results are discussed in the context of quantum confinement and the influence of interfaces on the electronic properties of nanocomposite materials.

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Electron energy loss spectra and optical constants of Bismuth

Cited by 16 publications

References 9 publications

Ab initiostudy of electron energy loss spectra of bulk bismuth up to 100 eV

Ab initiostudy of electron energy loss spectra of bulk bismuth up to 100 eV

Laser-excited acoustic oscillations in silver and bismuth nanowires

Plasmon excitation modes in nanowire arrays

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