All-optical control of spin in a 2D van der Waals magnet

Autor: Maciej Da̧browski, Shi Guo, Mara Strungaru, Paul S. Keatley, Freddie Withers, Elton J. G. Santos, Robert J. Hicken

Publikováno v: Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)

The use of light in driving the magnetization of materials has great technological potential, as well as allowing for insights into the fast dynamics of magnetic systems. Here, the authors combine CrI3, a van der Waals magnet, with WSe2, and demonstr

Externí odkaz: https://doaj.org/article/e13a52313d0e454bb36483d13a317641

Electrical tuning of optically active interlayer excitons in bilayer MoS2

Autor: Freddie Withers, Darren Nutting, Kristian Sommer Thygesen, Takashi Taniguchi, Janire Escolar, Alireza Taghizadeh, Kenji Watanabe, Namphung Peimyoo, Saverio Russo, Monica F. Craciun, Thorsten Deilmann

Publikováno v: Peimyoo, N, Deilmann, T, Withers, F, Escolar, J, Nutting, D, Taniguchi, T, Watanabe, K, Taghizadeh, A, Craciun, M F, Thygesen, K S & Russo, S 2021, ' Electrical tuning of optically active interlayer excitons in bilayer MoS 2 ', Nature Nanotechnology, vol. 16, no. 8, pp. 888-893 . https://doi.org/10.1038/s41565-021-00916-1

Interlayer (IL) excitons, comprising electrons and holes residing in different layers of van der Waals bonded two-dimensional semiconductors, have opened new opportunities for room-temperature excitonic devices. So far, two-dimensional IL excitons ha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c8eecd385db9e91d10a5871cce7acf2
https://doi.org/10.1038/s41565-021-00916-1

Excited State Spectroscopy of Boron Vacancy Defects in Hexagonal Boron Nitride using Time-Resolved Optically Detected Magnetic Resonance

Autor: Simon Baber, Ralph Nicholas Edward Malein, Prince Khatri, Paul Steven Keatley, Shi Guo, Freddie Withers, Andrew J. Ramsay, Isaac J. Luxmoore

We report optically detected magnetic resonance (ODMR) measurements of an ensemble of spin-1 negatively charged boron vacancies in hexagonal boron nitride. The photoluminescence decay rates are spin-dependent, with inter-system crossing rates of $1.0

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::799dc007382818136b0167370bf4bd8c
http://arxiv.org/abs/2111.11770

Engineering Dielectric Screening for Potential-well Arrays of Excitons in 2D Materials

Autor: Monica F. Craciun, Janire Escolar, Namphung Peimyoo, Adolfo De Sanctis, Anders C. Riis-Jensen, Saverio Russo, Frank Vollmer, Hsin-Yu Wu, Freddie Withers, Gabi Prando, Kristian Sommer Thygesen

Publikováno v: ACS applied materialsinterfaces. 12(49)

Tailoring of the band gap in semiconductors is essential for the development of novel devices. In standard semiconductors, this modulation is generally achieved through highly energetic ion implantation. In two-dimensional (2D) materials, the photoph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3bb52e5446bd35c7777bb9cb2e645cc
https://pubmed.ncbi.nlm.nih.gov/33232104

Electrically pumped WSe2-based light-emitting van der Waals heterostructures embedded in monolithic dielectric microcavities

Autor: Armando Genco, T. Godde, Eric Prestat, T. Taniguchi, Paul M. Walker, Alexander I. Tartakovskii, R. C. Schofield, A. P. Rooney, Sarah J. Haigh, D. N. Krizhanovskii, O. Del Pozo-Zamudio, Kenji Watanabe, S. Schwarz, Freddie Withers, C. Clark, Kostya S. Novoselov

Publikováno v: 2D Materials

Vertical stacking of atomically thin layered materials opens new possibilities for the fabrication of heterostructures with favorable optoelectronic properties. The combination of graphene, hexagonal boron nitride and semiconducting transition metal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::706ecf529da0d6b22b7d86288b8af766
https://eprints.whiterose.ac.uk/162681/1/Del_Pozo-Zamudio_2020_2D_Mater._7_031006.pdf