56 citations · 217 across the 21 of their papers we have counts for
22 papers
Persistent Photo-Enhancement of Molecular Orbital Excitations in the Kondo Insulator FeSb
Ke-Jun Xu, Nathan Giles-Donovan, Paulina Majchrzak +14
When insulators are excited by photons with above-gap energies, photo-doped carriers are transiently generated. Typically, orbital excitations weaken and broaden due to increased s…
Spectroscopic signatures of persistent exciton condensation in a bulk magnetic topological insulator
Paulina Majchrzak, Chakradhar Sahoo, Manuel Tuniz +7
Exciton condensates are long-sought correlated quantum states arising from macroscopic coherence of bound electron-hole pairs. Although equilibrium and transient excitonic states h…
Selective coupling of high-order phonons in La2-xSrxCuO4
Ke-Jun Xu, Paulina Majchrzak, Nathan Giles-Donovan +14
In crystals and molecules with strong coupling between the charge carriers and atomic vibrations, high order harmonics of the vibrational excitations can be observed with intensity…
Clustering-Enhanced Time- and Angle-Resolved Photoemission Study of LaTe: Absence of a Photoinduced Secondary CDW in the Electronic Structure
Gesa-R. Siemann, Davide Curcio, Anders S. Mortensen +9
Optical control offers a compelling route for tailoring material properties on an ultrafast time scale. Ordered states such as charge density waves (CDWs) can be transiently melted…
Resonantly enhanced photoemission from topological surface states in MnBiTe
Paulina Majchrzak, Alfred J. H. Jones, Klara Volckaert +5
The dispersion of topological surface bands in MnBiTe-based magnetic topological insulator heterostructures is strongly affected by band hybridization and is spatially inho…
Line shapes in time- and angle-resolved photoemission spectroscopy explored by machine learning
Tami C. Meyer, Gesa-R. Siemann, Paulina Majchrzak +6
Time- and angle-resolved photoemission spectroscopy is a powerful technique for investigating the dynamics of excited carriers in quantum materials. Typically, data analysis procee…
Quasiparticle gap renormalization driven by internal and external screening in a WS device
Chakradhar Sahoo, Yann in 't Veld, Alfred J. H. Jones +11
The electronic band gap of a two-dimensional semiconductor within a device architecture is sensitive to variations in screening properties of adjacent materials in the device and t…
Electron dynamics in a three-dimensional Brillouin zone analysed by machine learning
Paulina Majchrzak, Charlotte Sanders, Yu Zhang +10
The electron dynamics in the unoccupied states of the Weyl semimetal PtBi is studied by time- and angle-resolved photoemission spectroscopy (TR-ARPES). The measurement's result…
Ultrafast carrier dynamics throughout the three-dimensional Brillouin zone of the Weyl semimetal PtBi
Paulina Majchrzak, Charlotte Sanders, Yu Zhang +10
Using time- and angle-resolved photoemission spectroscopy, we examine the unoccupied electronic structure and electron dynamics of the type-I Weyl semimetal PtBi. Using the abi…
Direct view of gate-tunable miniband dispersion in graphene superlattices near the magic twist angle
Zhihao Jiang, Dongkyu Lee, Alfred J. H. Jones +12
Superlattices from twisted graphene mono- and bi-layer systems give rise to on-demand many-body states such as Mott insulators and unconventional superconductors. These phenomena a…
Impact of a monolayer on the nanoscale thermoelastic response of silicon heterostructures
Davide Soranzio, Denny Puntel, Manuel Tuniz +18
Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport propert…
Revealing flat bands and hybridization gaps in a twisted bilayer graphene device with microARPES
Zhihao Jiang, Kimberly Hsieh, Alfred J. H. Jones +7
Controlling the electronic structure of two-dimensional materials using the combination of twist angle and electrostatic doping is an effective means to induce emergent phenomena.…
Access to the full 3D Brillouin zone with time resolution, using a new tool for pump-probe ARPES
Paulina Majchrzak, Yu Zhang, Andrii Kuibarov +7
Here we report the first time- and angle-resolved photoemission spectroscopy (TR-ARPES) with the new Fermiologics "FeSuMa" analyzer. The new experimental setup has been commissione…
Van der Waals engineering of ultrafast carrier dynamics in magnetic heterostructures
Paulina Majchrzak, Yuntian Liu, Klara Volckaert +10
Heterostructures composed of the intrinsic magnetic topological insulator MnBiTe and its non-magnetic counterpart BiTe host distinct surface electronic band structu…
Ultrafast X-ray imaging of the light-induced phase transition in VO2
Allan S. Johnson, Daniel Pérez-Salinas, Khalid M. Siddiqui +26
Using light to control transient phases in quantum materials is an emerging route to engineer new properties and functionality, with both thermal and non-thermal phases observed ou…
Bulk band structure of SbTe determined by angle-resolved photoemission spectroscopy
Henriette E. Lund, Klara Volckaert, Paulina Majchrzak +4
The bulk band structure of the topological insulator \sbte~ is investigated by angle-resolved photoemission spectroscopy. Of particular interest is the dispersion of the uppermost…
Fermi surface tomography
Sergey Borisenko, Alexander Fedorov, Andrii Kuibarov +19
Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, e…
Spectroscopic view of ultrafast charge carrier dynamics in single- and bilayer transition metal dichalcogenide semiconductors
P. Majchrzak, K. Volckaert, A. G. Cabo +24
The quasiparticle spectra of atomically thin semiconducting transition metal dichalcogenides (TMDCs) and their response to an ultrafast optical excitation critically depend on inte…
Hot carrier-assisted switching of the electron-phonon interaction in 1-VSe
Paulina Majchrzak, Sahar Pakdel, Deepnarayan Biswas +20
We apply an intense infrared laser pulse in order to perturb the electronic and vibrational states in the three-dimensional charge density wave material 1-VSe. Ultrafast sna…
Ultrafast triggering of insulator-metal transition in two-dimensional VSe
Deepnarayan Biswas, Alfred J. H. Jones, Paulina Majchrzak +24
Assembling transition metal dichalcogenides (TMDCs) at the two-dimensional (2D) limit is a promising approach for tailoring emerging states of matter such as superconductivity or c…
Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from nanoARPES
Alfred J. H. Jones, Ryan Muzzio, Paulina Majchrzak +16
The possibility of triggering correlated phenomena by placing a singularity of the density of states near the Fermi energy remains an intriguing avenue towards engineering the prop…
Momentum-resolved linear dichroism in bilayer MoS
Klara Volckaert, Habib Rostami, Deepnarayan Biswas +19
Inversion-symmetric crystals are optically isotropic and thus naively not expected to show dichroism effects in optical absorption and photoemission processes. Here, we find a stro…