Observation of flat bands in twisted bilayer graphene
An international team of scientists from Geneva, Barcelona, and Leiden have revealed what makes magic angle graphene so special.
Evidence of dual topology in Pt2HgSe3
We published in PRL a combined experimental and theoretical study of the electronic structure of bulk Pt2HgSe3. We show that this material is one of only a few known dual-topological insulators, featuring different surface states that are linked to crystalline symmetries rather than to the...
High-Resolution Photoemission on Sr2RuO4 Reveals Correlation-Enhanced Spin-Orbit Coupling and Dominantly Local Self-Energies
Experiments reveal that quasiparticle properties in the superconductor Sr2RuO4 have a significant angular dependence due to the combined effects of local electron interactions and spin-orbit coupling.
Microfocus Laser–based Angle-Resolved Photoemission on Encapsulated 1T′-WTe2
January 2019: We measured the electronic structure of exfoliated mono-, bi-, and few-layer 1T′-WTe2 by laser-based microfocus angle-resolved photoemission. This is achieved by encapsulating with monolayer graphene a flake of WTe2 comprising regions of different thickness. Our data support the...
In-situ strain tuning of the metal-insulator-transition of Ca2RuO4
We studied the evolution of the k-space electronic structure of bulk Ca2RuO4, lightly doped with Pr, under uniaxial strain. Using ultrathin plate-like crystals, we achieve uniaxial strain levels up to−4.1%, sufficient to suppress the insulating Mott phase and access the previously unexplored...
Out-of-plane spin texture in a SrTiO3(111) 2DEG.
We have identified a three-dimensional spin texture in the two-dimensional electron gas (2DEG) at the SrTiO3 (111) surface. In a free-electron Rashba 2DEG system the induced spin polarization lies entirely in the plane of confinement. Our tight binding supercell calculations for the SrTiO3 (111) ...
Trivial Fermi arcs in the candidate type-II Weyl semimetal WTe2
September 2016: Using micro focused laser ARPES we have observed large Fermi arcs on both the top and bottom surface of WTe2. Our surface electronic structure calculations demonstrate that these Fermi arcs are topologically trivial and that their existence is independent of the presence of type-II ...
Fermi arcs and their topological character in the type-II Weyl semimetal MoTe2
We published in Phys. Rev. X a combined experimental and theoretical study of MoTe2, which provides new evidence for the existence of type-II Weyl semimetals.
Alberto de la Torre receives the “Prix Vacheron Constantin des Sciences 2016”
Alberto de la Torre has been awarded the “Prix Vacheron Constantin des Sciences 2016” for his doctoral thesis entitled Spectroscopic Studies of Layered Iridium Oxides and reporting “the doping evolution of the electronic structure of the single and bilayer iridates Sr2IrO4 and Sr3Ir2O7 from...
The fate of Fröhlich polarons in SrTiO3 – Nature Materials
We publish in Nature Materials a study of electron-phonon interactions in the SrTiO3(001) two-dimensional electron liquid.
Flavio Bruno has been awarded an Ambizione Fellowship by the SNF
His project will focus on the characterization of the electronic band structure and many-body effects in strongly correlated artificial heterostructure. The objective is to demonstrate that sputtering is an excellent growth method to produce high quality oxide heterostructure with a surface...
Collapse of the Mott gap and emergence of a nodal liquid in lightly doped Sr2IrO4 – in PRL
We report an ARPES study on the doping evolution of the Heisenberg antiferromagnet Sr2IrO4, a close analogue to underdoped cuprates (Phys. Rev. Lett. 115, 176402 (2015)).
Siobhan Mckeown Walker has received a prize at CORPES in Paris
Siobhan Mckeown Walker has been awarded a prize for the best poster presentation at the CORPES conference in Paris, France (5-10 July 2015). CORPES is an international workshop on strong correlations and angle-resolved photoemission spectroscopy. Siobhan presented our recent ARPES work on the 2DEG ...
Carrier density control of the surface 2DEG on SrTiO3(001)
Our study of the origin of the two-dimensional electron gas (2DEG) stabilized at the bare surface of SrTiO3 (001) has been accepted for publication in Advanced Materials.
Authorea’s APS Travel Grant Winner
Alberto de la Torre wins the Authorea's travel grant for European student attendees of the APS March meeting in San Antonio, TX. Read here an article about the 2015 travel grant winners.
Welcome to Sara Riccò
We welcome Sara Riccò as PhD student in our group. She will be working on ARPES studies of Fermi liquid states in 4d and 5d transition metal oxides.
Coherent quasiparticles in lightly doped Sr3Ir2O7
Our study of lightly doped Sr3Ir2O7 showing coherent quasiparticles and a small Fermi surface has been accepted for publication in PRL.