RT Journal Article
T1 Vertical Quantum Confinement in Bulk MoS2
A1 Obando Guevara, Jairo
A1 González García, Álvaro
A1 Rosmus, Marcin
A1 Olszowska, Natalia
A1 González Barrio, Miguel Ángel
A1 González Pascual, César
A1 Tejeda, Antonio
A1 Mascaraque Susunaga, Arantzazu
AB We experimentally observe quantum confinement states in bulk MoS2 by using angle-resolved photoemission spectroscopy (ARPES). The band structure at the Gamma point reveals quantum well states (QWSs) linked to vertical quantum confinement of the electrons, confirmed by the absence of dispersion in k z and a strong intensity modulation with the photon energy. Notably, the binding energy dependence of the QWSs versus n does not follow the quadratic dependence of a two-dimensional electron gas. Instead, a linear behavior is observed that is consistent with a parabolic-like quantum well. This confinement arises from the mechanical exfoliation preparation method, which leads to the detachment of a multilayer stack from the underlying bulk. This is confirmed by density functional theory (DFT) calculations. The quantum confinement in bulk-like MoS2 not only offers the opportunity to explore intersubband transitions to exploit optical properties but also provides a means to study fundamental quantum phenomena in multilayer stacks of different thicknesses.
PB ACS Publications
SN 1936-0851
YR 2025
FD 2025-01
LK https://hdl.handle.net/20.500.14352/118180
UL https://hdl.handle.net/20.500.14352/118180
LA eng
NO Obando-Guevara, Jairo, et al. «Vertical Quantum Confinement in Bulk MoS2». ACS Nano, vol. 19, n.o 2, enero de 2025, pp. 2540-48. DOI.org (Crossref), https://doi.org/10.1021/acsnano.4c13992
NO CT82/20-CT83/20NT-09-618999
NO Ministerio de Ciencia, Innovacion y Universidades (España)
NO Agencia Estatal de Investigación (España)
NO Comunidad de Madrid
NO Universidad Complutense de Madrid
NO Banco Santander
NO Agence Nationale de la Recherche (France)
NO European Commission
NO Ministry of Science and Higher Education (Poland)
NO Instituto de Física de Cantabria
DS Docta Complutense
RD 21 abr 2025