title: Stark Effect Spectroscopy of Mono- and Few-Layer MoS2.
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 ∼ 16 meV from which we extract the mean DC exciton polarizability ⟨β̅N⟩ = (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.
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.
authors: J
authors: J
authors: Klein
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.
authors: J
authors: J
authors: Wierzbowski
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.|Institute for Advanced Study, Technische Universität München , Lichtenbergstrasse 2a, 85748 Garching, Germany.
authors: A
authors: A
authors: Regler
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.
authors: J
authors: J
authors: Becker
authors: Lehrstuhl für Physik funktionaler Schichtsysteme, Physik Department E10, Technische Universität München , James-Franck-Straße 1, 85748 Garching, Germany.
authors: F
authors: F
authors: Heimbach
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.|E. L. Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors: K
authors: K
authors: Müller
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.
authors: M
authors: M
authors: Kaniber
authors: Walter Schottky Institut und Physik Department, Technische Universität München , Am Coulombwall 4, 85748 Garching, Germany.
authors: J J
authors: JJ
authors: Finley
keywords: 2D materials; electrical control; exciton polarizability; molybdenum disulfide; quantum confined Stark effect; transition metal dichalcogenides