Exciton oscillator strength in two-dimensional Dirac materials
نویسندگان
چکیده
منابع مشابه
Exciton Band Structure in Two-Dimensional Materials.
Low-dimensional materials differ from their bulk counterparts in many respects. In particular, the screening of the Coulomb interaction is strongly reduced, which can have important consequences such as the significant increase of exciton binding energies. In bulk materials the binding energy is used as an indicator in optical spectra to distinguish different kinds of excitons, but this is not ...
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Spatially resolved electron-energy-loss spectroscopy (EELS) is performed at diffuse interfaces between MoS2 and MoSe2 single layers. With a monochromated electron source (20 meV) we successfully probe excitons near the interface by obtaining the low loss spectra at the nanometer scale. The exciton maps clearly show variations even with a 10 nm separation between measurements; consequently, the ...
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R. de Lima Rodrigues Unidade Acadêmica de Educação Universidade Federal de Campina Grande, Cuité PB, CEP 58.175-000Brazil Centro Brasileiro de Pesquisas F́ısicas (CBPF) Rua Dr. Xavier Sigaud, 150, CEP 22290-180, Rio de Janeiro, RJ, Brazil Jambunatha Jayaraman (In memory) Departamento de F́ısica (CCEN), Universidade Federal da Paráıba, Campus I, João Pessoa-PB, CEP 58.059-970, Brazil Arvind Naraya...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2020
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.102.155305