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Träfflista för sökning "WFRF:(B. Guedes Eduardo) "

Sökning: WFRF:(B. Guedes Eduardo)

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Numrering	Referens	Omslagsbild	Hitta
1.	Kehoe, Laura, et al. (författare) Make EU trade with Brazil sustainable 2019 Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 364:6438, s. 341- Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
2.	Krieger, Jonas A., et al. (författare) Weyl spin-momentum locking in a chiral topological semimetal 2024 Ingår i: Nature Communications. - 2041-1723. ; 15:1 Tidskriftsartikel (refereegranskat)abstract Spin-orbit coupling in noncentrosymmetric crystals leads to spin-momentum locking – a directional relationship between an electron’s spin angular momentum and its linear momentum. Isotropic orthogonal Rashba spin-momentum locking has been studied for decades, while its counterpart, isotropic parallel Weyl spin-momentum locking has remained elusive in experiments. Theory predicts that Weyl spin-momentum locking can only be realized in structurally chiral cubic crystals in the vicinity of Kramers-Weyl or multifold fermions. Here, we use spin- and angle-resolved photoemission spectroscopy to evidence Weyl spin-momentum locking of multifold fermions in the chiral topological semimetal PtGa. We find that the electron spin of the Fermi arc surface states is orthogonal to their Fermi surface contour for momenta close to the projection of the bulk multifold fermion at the Γ point, which is consistent with Weyl spin-momentum locking of the latter. The direct measurement of the bulk spin texture of the multifold fermion at the R point also displays Weyl spin-momentum locking. The discovery of Weyl spin-momentum locking may lead to energy-efficient memory devices and Josephson diodes based on chiral topological semimetals.
3.	Neckel, Itamar T., et al. (författare) Unveiling Center-Type Topological Defects on Rosettes of Lead Zirconate Titanate Associated to Oxygen Vacancies 2021 Ingår i: Annalen der Physik. - : Wiley. - 0003-3804 .- 1521-3889. Tidskriftsartikel (refereegranskat)abstract Understanding the formation of topological defects in ferroelectric materials can provide access to their unusual physics, invaluable for possible applications of domain engineering in nanoelectronics. The present study shows the spontaneous formation of center-type topological defects in lead zirconate titanate (PZT) films, characterized by a strong in-plane radial electromechanical response on rosette-like structures, as revealed by piezoelectric response force microscopy. Multi-modal electron and X-ray based techniques provide a comprehensive set of tools for delving at atomic scale the local chemistry, electronic, and crystalline structures. The elemental surface-sensitivity of soft X-ray absorption shows chemical segregation and drastic changes in the titanium electronic structure, which have been associated to oxygen vacancies, leading to a mechanism that describe the polarization symmetry on the rosettes. X-ray nanofluorescence experiments revealed titanium segregation, corroborating with the absorption and low energy electron microscopy images. Taking advantage of a nanobeam, 2D nanodiffraction maps probed the complex microstructure of the domains, revealing its mosaicity and lattice strain at the nanoscale. This study highlights a complex topological structure and provides, by the simultaneous application of a set of analytical tools, a broad comprehension of the formation of center-type ferroelectric topological defects in PZT.

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Typ av publikation: tidskriftsartikel (3)

Typ av innehåll: refereegranskat (2); övrigt vetenskapligt/konstnärligt (1)

Författare/redaktör: Rothhaupt, Karl-Otto (1); Weigend, Maximilian (1); Farrell, Katharine N ... (1); Islar, Mine (1); Krause, Torsten (1); Uddling, Johan, 1972 (1); visa fler...; Alexanderson, Helena (1); Schneider, Christoph (1); Battiston, Roberto (1); Lukic, Marko (1); Pereira, Laura (1); Riggi, Laura (1); Cattaneo, Claudio (1); Jung, Martin (1); Andresen, Louise C. (1); Kasimir, Åsa (1); Wang-Erlandsson, Lan (1); Sutherland, William ... (1); Boonstra, Wiebren J. (1); Vajda, Vivi (1); Pascual, Unai (1); Tscharntke, Teja (1); Brown, Calum (1); Peterson, Gustaf (1); Meyer, Carsten (1); Seppelt, Ralf (1); Johansson, Maria (1); Zakharov, Alexei (1); Martin, Jean Louis (1); Olsson, Urban (1); Hortal, Joaquin (1); Buckley, Yvonne (1); Petrovan, Silviu (1); Schindler, Stefan (1); Carvalho, Joana (1); Amo, Luisa (1); Machordom, Annie (1); De Smedt, Pallieter (1); Lindkvist, Emilie (1); Matos-Maraví, Pável (1); Bacon, Christine D. (1); Silvestro, Daniele (1); Mascarenhas, André (1); McPhearson, Timon (1); Tengö, Maria (1); Morales, Manuel B. (1); Müller, Jörg (1); Kanka, Robert (1); Lehikoinen, Aleksi (1); Guedes, Thais (1); visa färre...

Lärosäte: Lunds universitet (3); Kungliga Tekniska Högskolan (1); Mittuniversitetet (1); Chalmers tekniska högskola (1); Sveriges Lantbruksuniversitet (1)

Språk: Engelska (3)

Forskningsämne (UKÄ/SCB): Naturvetenskap (3); Teknik (1); Samhällsvetenskap (1)

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