Wibke Bronsch

20244072

Hamoon Hedayat Zadeh Roodsari, Omar Abdul‐Aziz, Wibke Bronsch, Danilo Comini et autres

Physics of the spin-orbit coupling at the surface of the model topological insulators Bi 2 Se 3 and Bi 2 Te 3 : Theory and experiments

Denny Puntel, Francesco Sammartino, Wibke Bronsch, Simone Peli et autres

The dispersion of topological surface states in three-dimensional topological insulators (TIs) is commonly attributed to the atomic spin-orbit coupling (SOC) of the constituent elements. Whether the observable surface-state dispersion reflects this bare atomic value, or instead an effective SOC renormalized by surface–bulk …

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Photoinduced electronic band dynamics and defect-mediated surface potential evolution in PdSe2

Omar Abdul-Aziz, Manuel Tuniz, Wibke Bronsch, F. Parmigiani et autres

Abstract We use time- and angle-resolved photoemission spectroscopy (TR-ARPES) combined with density functional theory to investigate ultrafast carrier dynamics in low-symmetry layered semiconducting PdSe 2 . The indirect bandgap is determined to be 0.55 eV. Following photoexcitation above this gap, we resolve …

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Quenching the electronic order in a strongly-coupled charge-density-wave system by enhanced lattice fluctuations

Manuel Tuniz, Denny Puntel, Wibke Bronsch, Francesco Sammartino et autres

Abstract Charge-density-wave (CDW) materials having a strong electron-phonon coupling provide a powerful platform for investigating the intricate interplay between lattice fluctuations and a macroscopic quantum order. Here, using time- and angle-resolved photoemission spectroscopy (TR-ARPES), we reveal that the CDW gap closure in …

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Unveiling the exciton formation in time, energy and momentum domain in layered van der Waals semiconductors

Valentina Gosetti, Jorge Cervantes-Villanueva, Selene Mor, Davide Sangalli et autres

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Quench of the electronic order in a strongly-coupled charge-density-wave system by enhanced lattice fluctuations

Manuel Tuniz, Denny Puntel, Wibke Bronsch, Francesco Sammartino et autres

Charge-density-wave (CDW) materials having a strong electron-phonon coupling provide a powerful platform for investigating the intricate interplay between lattice fluctuations and a macroscopic quantum order. Using time- and angle-resolved photoemission spectroscopy (TR-ARPES), we reveal that the CDW gap closure in VTe2 is …

Ultrafast band structure dynamics in bulk 1 T − VSe 2

Wibke Bronsch, Manuel Tuniz, Denny Puntel, Francesco Sammartino et autres

Complex materials encompassing different phases of matter can display new light-induced states differing from those attainable under equilibrium conditions. These states can be realized when energy is injected in the material following a nonequilibrium pathway, unbalancing the unperturbed energy landscape of the …

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High-Mobility Electrons in Aqueous Iodide Solutions

Fabio Novelli, Adrian Buchmann, Iqra Yousaf, Lion-Luca Stiewe et autres

The photoexcitation of aqueous iodide solutions is a prototype for the generation of electrons in liquid water. Upon one-photon excitation, the precursors of the solvated electrons are localized states with a radius of a few angstroms. In contrast, with the aid of …

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Unveiling exciton formation: exploring the early stages in time, energy and momentum domain

Valentina Gosetti, Jorge Cervantes-Villanueva, Selene Mor, Davide Sangalli et autres

Resolving the early-stage dynamics of exciton formation following non-resonant photoexcitation in time, energy, and momentum is quite challenging due to their inherently fast timescales and the proximity of the excitonic state to the bottom of the conduction band. In this study, by …

Ultrafast spin transfer and its impact on the electronic structure

Kamil Bobowski, Xinwei Zheng, Björn Frietsch, Dominic Lawrenz et autres

Optically induced intersite spin transfer (OISTR) promises manipulation of spin systems within the ultimate time limit of laser excitation. Following its prediction, signatures of ultrafast spin transfer between oppositely aligned spin sublattices have been observed in magnetic alloys and multilayers. However, it …

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Impact of MoS2 Monolayers on the Thermoelastic Response of Silicon Heterostructures

Davide Soranzio, Denny Puntel, Manuel Tuniz, Paulina Ewa Majchrzak et autres

High Resolution Image Download MS PowerPoint Slide Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties at the nanoscale. Here, we show how the deposition of …

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Spatially resolved work-function manipulation of azobenzene-functionalized self-assembled monolayers by optical stimulation

Jan Böhnke, Beatrice Andres, Larissa Boie, Angela Richter et autres

Strongly differing static dipole moments of the trans and cis isomers of photochromic azobenzene allow for optical switching of the work function of azobenzene-functionalized self-assembled monolayers (SAMs). We apply these properties in a fundamental experiment to manipulate the area size of the …

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