411 citations · 1.2k across the 13 of their papers we have counts for
13 papers
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…
A Novel Quasi-One-Dimensional Topological Insulator in Bismuth Iodide -BiI
Gabriel Autès, Anna Isaeva, Luca Moreschini +16
Recent progress in the field of topological states of matter(1,2) has largely been initiated by the discovery of bismuth and antimony chalcogenide bulk topological insulators (TIs)…
Ultrafast Band Structure Control of a Two-Dimensional Heterostructure
Søren Ulstrup, Antonija Grubišić Čabo, Jill A. Miwa +12
The electronic structure of two-dimensional (2D) semiconductors can be significantly altered by screening effects, either from free charge carriers in the material itself, or by en…
Tunable Carrier Multiplication and Cooling in Graphene
Jens C. Johannsen, Søren Ulstrup, Alberto Crepaldi +13
Time- and angle-resolved photoemission measurements on two doped graphene samples displaying different doping levels reveal remarkable differences in the ultrafast dynamics of the…
Observation of Ultrafast Free Carrier Dynamics in Single Layer MoS
Antonija Grubišić Čabo, Jill A. Miwa, Signe S. Grønborg +11
The dynamics of excited electrons and holes in single layer (SL) MoS have so far been difficult to disentangle from the excitons that dominate the optical response of this mate…
Ramifications of Optical Pumping on the Interpretation of Time-Resolved Photoemission Experiments on Graphene
Søren Ulstrup, Jens Christian Johannsen, Federico Cilento +13
In pump-probe time and angle-resolved photoemission spectroscopy (TR-ARPES) experiments the presence of the pump pulse adds a new level of complexity to the photoemission process i…
The momentum and photon energy dependence of the circular dichroic photoemission in the bulk Rashba semiconductors BiTeX (X = I, Br, Cl)
A. Crepaldi, F. Cilento, M. Zacchigna +14
Bulk Rashba systems BiTeX (X = I, Br, Cl) are emerging as important candidates for developing spintronics devices, because of the coexistence of spin-split bulk and surface states,…
Ultrafast Dynamics of Massive Dirac Fermions in Bilayer Graphene
Søren Ulstrup, Jens Christian Johannsen, Federico Cilento +14
Bilayer graphene is a highly promising material for electronic and optoelectronic applications since it is supporting massive Dirac fermions with a tuneable band gap. However, no c…
Extracting the Temperature of Hot Carriers in Time- and Angle-Resolved Photoemission
Søren Ulstrup, Jens Christian Johannsen, Marco Grioni +1
The interaction of light with a material's electronic system creates an out-of-equilibrium (non-thermal) distribution of optically excited electrons. Non-equilibrium dynamics relax…
Evidence of reduced surface electron-phonon scattering in the conduction band of Bi_{2}Se_{3} by non-equilibrium ARPES
A. Crepaldi, F. Cilento, B. Ressel +11
The nature of the Dirac quasiparticles in topological insulators calls for a direct investigation of the electron-phonon scattering at the \emph{surface}. By comparing time-resolve…
Direct view on the ultrafast carrier dynamics in graphene
Jens Christian Johannsen, Søren Ulstrup, Federico Cilento +11
The ultrafast dynamics of excited carriers in graphene is closely linked to the Dirac spectrum and plays a central role for many electronic and optoelectronic applications. Harvest…
Detecting the local transport properties and the dimensionality of transport of epitaxial graphene by a multi-point probe approach
Lucas Barreto, Edward Perkins, Jens Johannsen +5
The electronic transport properties of epitaxial monolayer graphene (MLG) and hydrogen-intercalated quasi free-standing bilayer graphene (QFBLG) on SiC(0001) are investigated by mi…
Electron-phonon coupling in quasi free-standing graphene
Jens Christian Johannsen, Søren Ulstrup, Marco Bianchi +8
Quasi free-standing monolayer graphene can be produced by intercalating species like oxygen or hydrogen between epitaxial graphene and the substrate crystal. If the graphene is ind…