Publications (29)
About carrier's self-trapping and dynamical Rashba splitting in the two-dimensional hybrid perovskite (BA)(MA)PbI
W. Qi, S. Ponzoni, G. Huitric +13
Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the two-dimensional hybrid perovskite (BA)(MA)PbI…
Opening of the superconducting gap in the hole pockets of Ba(Fe(1-x)Co(x))2As2 as seen via Angle-Resolved PhotoElectron Spectroscopy
B. Mansart, E. Papalazarou, M. Fuglsang Jensen +8
We present an Angle-Resolved PhotoElectron Spectroscopy study of the changes in the electronic structure of electron doped Ba(Fe(1-x)Co(x))2As2 across the superconducting phase tra…
Dichroism in time-resolved ARPES and valence band orbital nature in BaNiS2
J. Zhang, Z. Chen, J. Caillaux +7
Time-resolved ARPES gives access to the band structure and ultrafast dynamics of excited electronic states in solids. The orbital character of the bands close to the Fermi level is…
Giant Anisotropy of Spin-Orbit Splitting at the Bismuth Surface
Y. Ohtsubo, J. Mauchain, J. Faure +6
We investigate the bismuth (111) surface by means of time and angle resolved photoelectron spectroscopy. The parallel detection of the surface states below and above the Fermi leve…
Surface effects on the Mott-Hubbard transition in archetypal VO
G. Lantz, M. Hajlaoui, E. Papalazarou +9
We present an experimental and theoretical study exploring surface effects on the evolution of the metal-insulator transition in the model Mott-Hubbard compound Cr-doped VO…
Ultrafast filling of an electronic pseudogap in an incommensurate crystal
V. Brouet, J. Mauchain, E. Papalazarou +11
We investigate the quasiperiodic crystal (LaS)1.196(VS2) by angle and time resolved photoemission spectroscopy. The dispersion of electronic states is in qualitative agreement with…
Ultrafast evolution and transient phases of the prototype out-of-equilibrium Mott-Hubbard material V2O3
G. Lantz, B Mansart, D. Grieger +17
The study of photoexcited strongly correlated materials is attracting growing interest since their rich phase diagram often translates into an equally rich out-of-equilibrium behav…
Inequivalent routes across the Mott transition in V2O3 explored by X-ray absorption
F. Rodolakis, P. Hansmann, J. -P. Rueff +14
The changes in the electronic structure of V2O3 across the metal-insulator transition induced by temperature, doping and pressure are identified using high resolution x-ray absorpt…
Low-Temperature Insulating Phase of the Si(111)--77 Surface
S. Modesti, P. M. Sheverdyaeva, P. Moras +5
We investigated the electronic structure of the Si(111)--77 surface below 20 K by scanning tunneling and photoemission spectroscopies and by density functional theory calcu…
Mott-Hubbard transition in V2O3 revisited
P. Hansmann, A. Toschi, G. Sangiovanni +4
The isostructural metal-insulator transition in Cr-doped V2O3 is the textbook example of a Mott-Hubbard transition between a paramagnetic metal and a paramagnetic insulator. We rev…
Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba(Fe(1-x)Co(x))2As2
B. Mansart, D. Boschetto, A. Savoia +7
The transient response of Ba(Fe(1-x)Co(x))2As2, x=0.08 was studied by pump-probe optical reflectivity. After ultrafast photoexcitation, hot electrons were found to relax with two d…
Valence band electronic structure of V2O3: identification of V and O bands
E. Papalazarou, Matteo Gatti, M. Marsi +14
We present a comprehensive study of the photon energy dependence of the valence band photoemission yield in the prototype Mott-Hubbard oxide V2O3. The analysis of our experimental…
Direct observation of electron thermalization and electron-phonon coupling in photoexcited bismuth
J. Faure, J. Mauchain, E. Papalazarou +7
We investigate the ultrafast response of the bismuth (111) surface by means of time resolved photoemission spectroscopy. The direct visualization of the electronic structure allows…
Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry
M. Hajlaoui, E. Papalazarou, J. Mauchain +19
The advent of Dirac materials has made it possible to realize two dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their phot…
Significant reduction of electronic correlations upon isovalent Ru substitution of BaFe2As2
V. Brouet, F. Rullier-Albenque, M. Marsi +10
We present a detailed investigation of Ba(Fe0.65Ru0.35)2As2 by transport measurements and Angle Resolved photoemission spectroscopy. We observe that Fe and Ru orbitals hybridize to…
Electron-hole balanced dynamics in the type-II Weyl semimetal candidate WTe2
M. Caputo, L. Khalil, E. Papalazarou +5
We present a time- and angular-resolved photoemission (TR-ARPES) study of the transition- metal dichalcogenide WTe2, a candidate type II Weyl semimetal exhibiting extremely large m…
Time resolved photoemission of SrIrO
C. Piovera, V. Brouet, E. Papalazarou +5
We investigate the temporal evolution of electronic states in strontium iridate SrIrO. The time resolved photoemission spectra of intrinsic, electron doped and the hole dop…
Quasiparticles dynamics in high-temperature superconductors far from equilibrium: an indication of pairing amplitude without phase coherence
C. Piovera, Z. Zhang, M. d'Astuto +6
We perform time resolved photoelectron spectroscopy measurements of optimally doped $\tn{Bi}_2\tn{Sr}_2\tn{CaCu}_2\tn{O}_{8+δ}$ (Bi-2212) and $\tn{Bi}_2\tn{Sr}_{2-x}\tn{La}_{x}\tn…
Tuning Dirac nodes with correlated d-electrons in BaCo_{1-x}Ni_{x}S_{2}
N. Nilforoushan, M. Casula, A. Amaricci +15
Dirac fermions play a central role in the study of topological phases, for they can generate a variety of exotic states, such as Weyl semimetals and topological insulators. The con…
Coherent Phonon Coupling to Individual Bloch States in Photoexcited Bismuth
E. Papalazarou, J. Faure, J. Mauchain +8
We investigate the temporal evolution of the electronic states at the bismuth (111) surface by means of time and angle resolved photoelectron spectroscopy. The binding energy of bu…
Photoinduced filling of near nodal gap in BiSrCaCuO
Z. Zhang, C. Piovera, E. Papalazarou +5
We report time and angle resolved spectroscopic measurements in optimally doped BiSrCaCuO. The spectral function is monitored as a function of temperature, pho…
Evolution of the electronic structure of a Mott system across its phase diagram: an X-ray absorption spectroscopy study of (V(1-x)Crx)2O3
F. Rodolakis, J. -P. Rueff, M. Sikora +12
V2O3 is an archetypal system for the study of correlation induced, Mott-Hubbard metal-insulator transitions. Despite decades of extensive investigations, the accurate description o…
Nesting between hole and electron pockets in Ba(Fe1-xCox)2As2 (x=0-0.3) observed with angle-resolved photoemission
V. Brouet, M. Marsi, B. Mansart +7
We present a comprehensive angle-resolved photoemission study of the three-dimensional electronic structure of Ba(Fe1-xCox)2As2. The wide range of dopings covered by this study, x=…
A Microscopic View on the Mott transition in Chromium-doped V2O3
S. Lupi, L. Baldassarre, B. Mansart +18
V2O3 is the prototype system for the Mott transition, one of the most fundamental phenomena of electronic correlation. Temperature, doping or pressure induce a metal to insulator t…
Optical properties of V2O3 in its whole phase diagram
I. Lo Vecchio, L. Baldassarre, F. D'Apuzzo +7
Vanadium sesquioxide V2O3 is considered a textbook example of Mott-Hubbard physics. In this paper we present an extended optical study of its whole temperature/doping phase diagram…
Mott transition in Cr-doped V2O3 studied by ultrafast reflectivity: electron correlation effects on the transient response
B. Mansart, D. Boschetto, S. Sauvage +2
The ultrafast response of the prototype Mott-Hubbard system (V1-xCrx)2O3 was systematically studied with fs pump-probe reflectivity, allowing us to clearly identify the effects of…
Quasiparticle evolution and pseudogap formation in V2O3: An infrared spectroscopy study
L. Baldassarre, A. Perucchi, D. Nicoletti +10
The infrared conductivity of V2O3 is measured in the whole phase diagram. Quasiparticles appear above the Neel temperature TN and eventually disappear further enhancing the tempera…
Atomic and itinerant effects at the transition metal x-ray absorption K-pre-edge exemplified in the case of VO
P. Hansmann, M. W. Haverkort, A. Toschi +5
X-ray absorption spectroscopy is a well established tool for obtaining information about orbital and spin degrees of freedom in transition metal- and rare earth-compounds. For this…
Ultrafast surface carrier dynamics in the topological insulator Bi2Te3
M. Hajlaoui, E. Papalazarou, J. Mauchain +9
We discuss the ultrafast evolution of the surface electronic structure of the topological insulator BiTe following a femtosecond laser excitation. Using time and angle reso…