Stark Effect Spectroscopy of Mono- and Few-Layer MoS2.
Nano Lett
; 16(3): 1554-9, 2016 Mar 09.
Article
em En
| MEDLINE
| ID: mdl-26845085
ABSTRACT
We demonstrate electrical control of the A-exciton interband transition in mono- and few-layer MoS2 crystals embedded into photocapacitor devices via the DC Stark effect. Electric field-dependent low-temperature photoluminescence spectroscopy reveals a significant tuneability of the A-exciton transition energy up to â¼ 16 meV from which we extract the mean DC exciton polarizability ⟨ßÌ
N⟩ = (0.58 ± 0.25) × 10(-8) Dm V(-1). The exciton polarizability is shown to be layer-independent, indicating a strong localization of both electron and hole wave functions in each individual layer.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Alemanha