461 citations · 1.3k across the 13 of their papers we have counts for
13 papers
Phase Separation in the Vicinity of Fermi Surface Hot Spots
T. Jaouen, B. Hildebrand, M. -L. Mottas +12
Spatially inhomogeneous electronic states are expected to be key ingredients for the emergence of superconducting phases in quantum materials hosting charge-density-waves (CDWs). P…
Charge puddles in a completely compensated topological insulator
C. W. Rischau, A. Ubaldini, E. Giannini +1
Compensation of intrinsic charges is widely used to reduce the bulk conductivity of 3D topological insulators (TIs). Here we use low temperature electron irradiation-induced defect…
Short-range phase coherence and origin of the 1T-TiSe2 charge density wave
B. Hildebrand, T. Jaouen, C. Didiot +9
The impact of variable Ti self-doping on the 1T-TiSe2 charge density wave (CDW) is studied by scanning tunneling microscopy. Supported by density functional theory we show that agg…
Indirect-to-direct band-gap crossover in few-layer MoTe
Ignacio Gutiérrez-Lezama, Ashish Arora, Alberto Ubaldini +4
We study the evolution of the band-gap structure in few-layer MoTe crystals, by means of low-temperature micro-reflectance (MR) and temperature-dependent photoluminescence (PL)…
STM microscopy of the CDW in 1T-TiSe2 in the presence of single atom defects
A. M. Novello, B. Hildebrand, A. Scarfato +7
We present a detailed low temperature scanning tunneling microscopy study of the commensurate charge density wave (CDW) in 1-TiSe in the presence of single atom defects. We…
Surface transport and band gap structure of exfoliated 2H-MoTe crystals
Ignacio Gutiérrez Lezama, Alberto Ubaldini, Maria Longobardi +4
Semiconducting transition metal dichalcogenides (TMDs) have emerged as materials that can be used to realize two-dimensional (2D) crystals possessing rather unique transport and op…
Improved chemical vapor transport growth of transition metal dichalcogenides
Alberto Ubaldini, Enrico Giannini
In the crystal growth of transition metal dichalcogenides by the Chemical Vapor Transport method (CVT), the choice of the transport agent plays a key role. We have investigated the…
Infrared and Raman spectroscopy measurements of a transition in the crystal structure and a closing of the energy gap of BiTeI under pressure
M. K. Tran, J. Levallois, P. Lerch +8
BiTeI is a giant Rashba spin splitting system, in which a non-centro symmetric topological phase has recently been suggested to appear under high pressure. We investigated the opti…
Layer-by-layer entangled spin-orbital texture of the topological surface state in Bi2Se3
Z. -H. Zhu, C. N. Veenstra, G. Levy +7
We study Bi2Se3 by polarization-dependent angle-resolved photoemission spectroscopy (ARPES) and density-functional theory slab calculations. We find that the surface state Dirac fe…
Bi2Te_xSe_y series studied by resistivity and thermopower
Ana Akrap, Alberto Ubaldini, Enrico Giannini +1
We study the detailed temperature and composition dependence of the resistivity, , and thermopower, , for a series of layered bismuth chalcogenides BiTeSe$_…
Optical properties of Bi2Te2Se at ambient and high pressure
Ana Akrap, Michael Tran, Alberto Ubaldini +5
The temperature dependence of the complex optical properties of the three-dimensional topological insulator Bi2Te2Se is reported for light polarized in the a-b planes at ambient pr…
Gate-tuned normal and superconducting transport at the surface of a topological insulator
B. Sacepe, J. B. Oostinga, J. Li +4
Three-dimensional topological insulators are characterized by the presence of a bandgap in their bulk and gapless Dirac fermions at their surfaces. New physical phenomena originati…
BiOCuS: A new superconducting compound with oxypnictide - related structure
A. Ubaldini, E. Giannini, C. Senatore +1
The discovery of about 50 K superconductivity in the tetragonal Fe-based pnictides has stimulated the search for superconductivity in a wide class of materials with similar structu…