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Title: Zeeman splitting via spin-valley-layer coupling in bilayer MoTe2
Authors: Jiang, Chongyun
Liu, Fucai
Cuadra, Jorge
Huang, Zumeng
Li, Ke
Rasmita, Abdullah
Srivastava, Ajit
Liu, Zheng
Gao, Wei-Bo
Keywords: Photoluminescence
Tellurium Derivative
Issue Date: 2017
Source: Jiang, C., Liu, F., Cuadra, J., Huang, Z., Li, K., Rasmita, A., et al. (2017). Zeeman splitting via spin-valley-layer coupling in bilayer MoTe2. Nature Communications, 8(1), 802-.
Series/Report no.: Nature Communications
Abstract: Atomically thin monolayer transition metal dichalcogenides possess coupling of spin and valley degrees of freedom. The chirality is locked to identical valleys as a consequence of spin–orbit coupling and inversion symmetry breaking, leading to a valley analog of the Zeeman effect in presence of an out-of-plane magnetic field. Owing to the inversion symmetry in bilayers, the photoluminescence helicity should no longer be locked to the valleys. Here we show that the Zeeman splitting, however, persists in 2H-MoTe2 bilayers, as a result of an additional degree of freedom, namely the layer pseudospin, and spin–valley-layer locking. Unlike monolayers, the Zeeman splitting in bilayers occurs without lifting valley degeneracy. The degree of circularly polarized photoluminescence is tuned with magnetic field from −37% to 37%. Our results demonstrate the control of degree of freedom in bilayer with magnetic field, which makes bilayer a promising platform for spin-valley quantum gates based on magnetoelectric effects.
ISSN: 2041-1723
DOI: 10.1038/s41467-017-00927-4
Rights: © 2017 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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