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11 p, 6.0 MB |
A pre-time-zero spatiotemporal microscopy technique for the ultrasensitive determination of the thermal diffusivity of thin films
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Varghese, Sebin (Institut Català de Nanociència i Nanotecnologia) ;
Mehew, Jake Dudley (Institut Català de Nanociència i Nanotecnologia) ;
Block, Alexander (Institut Català de Nanociència i Nanotecnologia) ;
Saleta Reig, David (Institut Català de Nanociència i Nanotecnologia) ;
Woźniak, Pawel (Institut de Ciències Fotòniques) ;
Farris, Roberta (Institut Català de Nanociència i Nanotecnologia) ;
Zanolli, Zeila (Utrecht University) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Verstraete, Matthieu J. (Université de Liège) ;
van Hulst, Niek F.. (Institut de Ciències Fotòniques) ;
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Diffusion is one of the most ubiquitous transport phenomena in nature. Experimentally, it can be tracked by following point spreading in space and time. Here, we introduce a spatiotemporal pump-probe microscopy technique that exploits the residual spatial temperature profile obtained through the transient reflectivity when probe pulses arrive before pump pulses. [...]
2023 -  10.1063/5.0102855
Review of Scientific Instruments, Vol. 94, Issue 3 (March 2023) , art. 34903
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6 p, 1.2 MB |
Electrical control of spin-polarized topological currents in monolayer WTe2
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Garcia, José H. (Institut Català de Nanociència i Nanotecnologia) ;
You, Jinxuan (Universitat Autònoma de Barcelona. Departament de Física) ;
García-Mota, Mónica (Simune Atomistics S.L.) ;
Koval, Peter (Simune Atomistics S.L.) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Cuadrado, Ramón (Institut Català de Nanociència i Nanotecnologia) ;
Verstraete, Matthieu J. (Université de Liège. Complex and Entangled Systems from Atoms to Materials) ;
Zanolli, Zeila (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)
We evidence the possibility for coherent electrical manipulation of the spin orientation of topologically protected edge states in a low-symmetry quantum spin Hall insulator. By using a combination of ab initio simulations, symmetry-based modeling, and large-scale calculations of the spin Hall conductivity, it is shown that small electric fields can efficiently vary the spin textures of edge currents in monolayer 1T'-WTe2 by up to a 90-degree spin rotation, without jeopardizing their topological character. [...]
2022 - 10.1103/PhysRevB.106.L161410
Physical review B, Vol. 106, issue 16 (Oct. 2022) , art. L161410
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9 p, 2.0 MB |
Unraveling heat transport and dissipation in suspended MoSe2 from bulk to monolayer
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Saleta Reig, David (Institut Català de Nanociència i Nanotecnologia) ;
Varghese, Sebin (Institut Català de Nanociència i Nanotecnologia) ;
Farris, Roberta (Institut Català de Nanociència i Nanotecnologia) ;
Block, Alexander (Institut Català de Nanociència i Nanotecnologia) ;
Mehew, Jake D. (Institut Català de Nanociència i Nanotecnologia) ;
Hellman, Olle (Weizmann Institute of Science (Israel). Department of Molecular Chemistry and Materials Science) ;
Woźniak, Pawel (Institut de Ciències Fotòniques) ;
Sledzinska, Marianna (Institut Català de Nanociència i Nanotecnologia) ;
Sachat, Alexandros el (Institut Català de Nanociència i Nanotecnologia) ;
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia) ;
Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia) ;
van Hulst, Niek F.. (Institut de Ciències Fotòniques) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Zanolli, Zeila (Debye Institute for Nanomaterials Science) ;
Sotomayor Torres, Clivia M. (Institut Català de Nanociència i Nanotecnologia) ;
Verstraete, Matthieu J. (European Theoretical Spectroscopy Facility) ;
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Understanding heat flow in layered transition metal dichalcogenide (TMD) crystals is crucial for applications exploiting these materials. Despite significant efforts, several basic thermal transport properties of TMDs are currently not well understood, in particular how transport is affected by material thickness and the material's environment. [...]
2022 - 10.1002/adma.202108352
Advanced materials, Vol. 34, issue 10 (March 2022) , art. 2108352
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10 p, 15.3 MB |
Tuning the topological band gap of bismuthene with silicon-based substrates
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Wittemeier, Nils (Institut Català de Nanociència i Nanotecnologia) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Zanolli, Zeila (Utrecht University. Chemistry Department)
Some metastable polymorphs of bismuth monolayers (bismuthene) can host non-trivial topological phases. However, it remains unclear whether these polymorphs can become stable through interaction with a substrate, whether their topological properties are preserved, and how to design an optimal substrate to make the topological phase more robust. [...]
2022 - 10.1088/2515-7639/ac84ad
JPhys materials, Vol. 5, issue 3 (July. 2022) , art. 35002
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8 p, 2.7 MB |
Magnetic properties of coordination clusters with {Mn4} and {Co4} antiferromagnetic cores
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Achilli, Simona (Universitá degli Studi di Milano. Dipartimento di Fisica "Aldo Pontremoli") ;
Besson, Claire (The George Washington University. Department of Chemistry) ;
He, Xu (Institut Català de Nanociència i Nanotecnologia) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Meyer, Carola (Universität Osnabrück. Department of Physics) ;
Zanolli, Zeila (Institut Català de Nanociència i Nanotecnologia)
We present a joint experimental and theoretical characterization of the magnetic properties of coordination clusters with an antiferromagnetic core of four magnetic ions. Two different compounds are analyzed, with Co and Mn ions in the core. [...]
2022 - 10.1039/d1cp03904k
Physical chemistry chemical physics, Vol. 24, issue 6 (Feb. 2022) , p. 3780-3787
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10 p, 3.3 MB |
Changes of structure and bonding with thickness in chalcogenide thin films
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Ronneberger, Ider (Jülich Aachen Research Alliance) ;
Zanolli, Zeila (Institut Català de Nanociència i Nanotecnologia) ;
Wuttig, Matthias (Jülich Aachen Research Alliance) ;
Mazzarello, Riccardo (Jülich Aachen Research Alliance)
Extreme miniaturization is known to be detrimental for certain properties, such as ferroelectricity in perovskite oxide films below a critical thickness. Remarkably, few-layer crystalline films of monochalcogenides display robust in-plane ferroelectricity with potential applications in nanoelectronics. [...]
2020 - 10.1002/adma.202001033
Advanced materials, Vol. 32, issue 29 (July 2020) , art. 2001033
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