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| 100 | 1 | _ | |a Nakayama, Yasuo |0 0000-0001-5014-6858 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Anisotropic dispersion of excitonic bands of the single-crystal pentacene (001) surface as measured by low-energy angle-resolved high-resolution electron energy-loss spectroscopy |
| 260 | _ | _ | |a New York, NY [u.a.] |c 2025 |b Elsevier |
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| 520 | _ | _ | |a Low-energy high-resolution electron energy-loss spectroscopy (HREELS) is a useful technique for the charac-terization of various excitation processes at solid surfaces. However, no successful work has been reported onmolecular single-crystal samples yet. In the present study, low-energy angle-resolved HREELS measurementswere conducted on single-crystal pentacene, an organic semiconductor. The results confirmed the excitonicbands exhibiting energy–momentum dispersion and anisotropy of these depending on the surface crystallo-graphic directions, corroborating the occurrence of exciton delocalization, contrary to the ordinary notion of theFrenkel exciton for weakly interacting van der Waals molecular solids. The present results demonstrate that low-energy angle-resolved HREELS is applicable to the precise examination of the excitonic characteristics of solid-state surfaces, even for molecular semiconductor single crystals. |
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| 700 | 1 | _ | |a Bocquet, François C. |0 P:(DE-Juel1)167128 |b 1 |
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| 700 | 1 | _ | |a Tautz, F. Stefan |0 P:(DE-Juel1)128791 |b 4 |e Last author |
| 773 | _ | _ | |a 10.1016/j.elspec.2025.147514 |g Vol. 279, p. 147514 - |0 PERI:(DE-600)1491139-5 |p 147514 |t Journal of electron spectroscopy and related phenomena |v 279 |y 2025 |x 0368-2048 |
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