In Operando Angle‐Resolved Photoemission Spectroscopy with Nanoscale Spatial Resolution: Spatial Mapping of the Electronic Structure of Twisted Bilayer Graphene

Autor: Paulina Majchrzak, Ryan Muzzio, Alfred J. H. Jones, Davide Curcio, Klara Volckaert, Deepnarayan Biswas, Jacob Gobbo, Simranjeet Singh, Jeremy T. Robinson, Kenji Watanabe, Takashi Taniguchi, Timur K. Kim, Cephise Cacho, Jill A. Miwa, Philip Hofmann, Jyoti Katoch, Søren Ulstrup

Publikováno v: Small Science, Vol 1, Iss 6, Pp n/a-n/a (2021)

To pinpoint the electronic and structural mechanisms that affect intrinsic and extrinsic performance limits of 2D material devices, it is of critical importance to resolve the electronic properties on the mesoscopic length scale of such devices under

Externí odkaz: https://doaj.org/article/b2b80a272b5b4543a81c8d3e83f52a10

Surface Electronic Structure Engineering of Manganese Bismuth Tellurides Guided by Micro‐Focused Angle‐Resolved Photoemission

Autor: Klara Volckaert, Paulina Majchrzak, Deepnarayan Biswas, Alfred J. H. Jones, Marco Bianchi, Zhihao Jiang, Raphaël Dubourg, Rasmus Ørnekoll Stenshøj, Mads Lykke Jensen, Nykola C. Jones, Søren V. Hoffmann, Jian‐Li Mi, Martin Bremholm, Xing‐Chen Pan, Yong P. Chen, Philip Hofmann, Jill A. Miwa, Søren Ulstrup

Publikováno v: Volckaert, K, Majchrzak, P E, Biswas, D, Jones, A, Bianchi, M, Jiang, Z, Dubourg, R, Jensen, M L, Stenshøj, R Ø, Jones, N C, Hoffmann, S V, Mi, J-L, Bremholm, M, Pan, X C, Chen, Y P, Hofmann, P, Miwa, J & Ulstrup, S 2023, ' Surface electronic structure engineering of manganese bismuth tellurides guided by micro-focused angle-resolved photoemission ', Advanced Materials . https://doi.org/10.1002/adma.202301907

Modification of the electronic structure of quantum matter by ad atom deposition allows for directed fundamental design of electronic and magnetic properties. This concept is utilized in the present work in order to tune the surface electronic struct

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d51d4ca3d51ffccd39ebeb373fed900
https://doi.org/10.1002/adma.202301907

Direct Visualization of Subnanometer Variations in the Excitonic Spectra of 2D/3D Semiconductor/Metal Heterostructures

Autor: Kate Reidy, Paulina Ewa Majchrzak, Benedikt Haas, Joachim Dahl Thomsen, Andrea Konečná, Eugene Park, Julian Klein, Alfred J. H. Jones, Klara Volckaert, Deepnarayan Biswas, Matthew D. Watson, Cephise Cacho, Prineha Narang, Christoph T. Koch, Søren Ulstrup, Frances M. Ross, Juan Carlos Idrobo

Publikováno v: Reidy, K, Majchrzak, P E, Haas, B, Thomsen, J D, Konečná, A, Park, E, Klein, J, Jones, A J H, Volckaert, K, Biswas, D, Watson, M D, Cacho, C, Narang, P, Koch, C T, Ulstrup, S, Ross, F M & Idrobo, J C 2023, ' Direct Visualization of Subnanometer Variations in the Excitonic Spectra of 2D/3D Semiconductor/Metal Heterostructures ', Nano Letters, vol. 23, no. 3, pp. 1068-1076 . https://doi.org/10.1021/acs.nanolett.2c04749

The integration of metallic contacts with two-dimensional (2D) semiconductors is routinely required for the fabrication of nanoscale devices. However, nanometer-scale variations in the 2D/metal interface can drastically alter the local optoelectronic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4feca3a24f52129762ffeb3c5efe9ee
https://pure.au.dk/portal/da/publications/direct-visualization-of-subnanometer-variations-in-the-excitonic-spectra-of-2d3d-semiconductormetal-heterostructures(ee4bca49-531b-4648-83a2-ae67387e41ea).html

Spectroscopic view of ultrafast charge carrier dynamics in single- and bilayer transition metal dichalcogenide semiconductors

Autor: Jeppe V. Lauritsen, Adam S. Wyatt, Maciej Dendzik, Oliver Alexander, Klara Volckaert, Daniel Lizzit, Sanjoy K. Mahatha, Igor Marković, Phil D. C. King, Luca Bignardi, Philip Hofmann, Dan Matselyukh, Charlotte E. Sanders, Søren Ulstrup, Federico Andreatta, Cephise Cacho, Signe S. Grønborg, J. M. Riley, Paulina Majchrzak, Jens Christian Johannsen, Deepnarayan Biswas, Antonija Grubišić Čabo, Emma Springate, Silvano Lizzit, Richard T. Chapman, Marco Bianchi, Jill A. Miwa

Publikováno v: Majchrzak, P, Volckaert, K, Čabo, A G, Biswas, D, Bianchi, M, Mahatha, S K, Dendzik, M, Andreatta, F, Grønborg, S S, Marković, I, Riley, J M, Johannsen, J C, Lizzit, D, Bignardi, L, Lizzit, S, Cacho, C, Alexander, O, Matselyukh, D, Wyatt, A S, Chapman, R T, Springate, E, Lauritsen, J V, King, P D C, Sanders, C E, Miwa, J A, Hofmann, P & Ulstrup, S 2021, ' Spectroscopic view of ultrafast charge carrier dynamics in single-and bilayer transition metal dichalcogenide semiconductors ', Journal of Electron Spectroscopy and Related Phenomena, vol. 250, 147093 . https://doi.org/10.1016/j.elspec.2021.147093

The quasiparticle spectra of atomically thin semiconducting transition metal dichalcogenides (TMDCs) and their response to an ultrafast optical excitation critically depend on interactions with the underlying substrate. Here, we present a comparative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d18f5ab45b25656ed489ed8941770d3
https://pure.au.dk/portal/da/publications/spectroscopic-view-of-ultrafast-charge-carrier-dynamics-in-single-and-bilayer-transition-metal-dichalcogenide-semiconductors(57b6fcc6-a6d3-4f4a-ad33-d52ac32297ac).html

Local excitons in Si/Ge inverted quantum huts (IQHs) embedded Si

Autor: Milan K. Sanyal, Sangeeta Thakur, Khadiza Ali, Arka Bikash Dey, Kalobaran Maiti, Swapnil Patil, Deepnarayan Biswas

Publikováno v: Journal of physics. Condensed matter : an Institute of Physics journal. 33(42)

We investigate the properties of excitons in the SiGe inverted quantum huts (IQHs) embedded in Si employing high-resolution x-ray photoemission spectroscopy. Ultra-small Si/Ge IQHs (13.3 nm × 6.6 nm) were grown on a Si buffer layer deposited on a Si

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5ef6e685b3ba56b5f117b94c539596d
https://pubmed.ncbi.nlm.nih.gov/34311451