173 citations · 450 across the 18 of their papers we have counts for
18 papers
Scanning Tunneling Microscopy in high vectorial magnetic fields
Jaime Rumeu Ozores, Miguel Águeda Velasco, Edwin Herrera +10
The Scanning Tunneling Microscope (STM) is a powerful instrument to study electronic density of states at surfaces down to atomic scale. Many interesting samples require studying v…
High-Resolution Scanning Tunneling Microscope and its Adaptation for Local Thermopower Measurements in 2D Materials
Jose D. Bermúdez-Perez, Edwin Herrera-Vasco, Javier Casas-Salgado +7
We present the design, fabrication and discuss the performance of a new combined high-resolution Scanning Tunneling and thermopower Microscope (STM/SThEM). We also describe the dev…
Room temperature multiferroicity in a transition metal dichalcogenide
G. Cardenas-Chirivi, K. Vega-Bustos, H. Rojas-Páez +8
The coexistence of multiple ferroic orders, i.e. multiferroicity, is a scarce property to be found in materials. Historically, this state has been found mainly in 3-dimensional com…
Quantum-well states at the surface of the heavy-fermion superconductor URuSi
Edwin Herrera-Vasco, Isabel Guillamón, Víctor Barrena +10
Electrons can form a two-dimensional electron gas at metal surfaces, where lateral confinement leads to quantum-well states. Such states have been observed for highly itinerant ele…
Direct observation of discommensurate charge density wave modulation in the quasi-1D Weyl semimetal candidate NbTe
J. A. Galvis, A. Fang, D. Jimenez-Guerrero +8
The transition-metal tetrachalcogenides are a model system to explore the conjunction of correlated electronic states such as charge density waves (CDW), with topological phases of…
Raman spectroscopy of few-layers TaS and Mo-doped TaS with enhanced superconductivity
S. Valencia-Ibáñez, D. Jimenez-Guerrero, J. D. Salcedo-Pimienta +6
The use of simple, fast and economic experimental tools to characterize low-dimensional materials is an important step in the process of democratizing the use of such materials in…
One-dimensional moire charge density wave in the hidden order state of URu2Si2 induced by fracture
Edwin Herrera, Victor Barrena, Isabel Guillamon +6
Moiré patterns can lead to fundamentally new electronic behavior when formed between two atomic lattices slightly shifted with respect to each other. A solid is however not just ch…
Thermal creep emerging from cooling a tilted vortex lattice in uniaxial superconductor
Roland Willa, Jose Augusto Galvis, Jose Benito-Llorens +3
A perturbed system relaxes towards an equilibrium given by a minimum in the potential energy landscape. This often occurs by thermally activated jumps over metastable states. The c…
Tilted vortex cores and superconducting gap anisotropy in 2H-NbSe2
J. A. Galvis, E. Herrera, C. Berthod +3
Superconducting vortex cores have been extensively studied for magnetic fields applied perpendicular to the surface by mapping the density of states (DOS) through Scanning Tunnelin…
Scale-invariant magnetoresistance in a cuprate superconductor
P. Giraldo-Gallo, J. A. Galvis, Z. Stegen +14
The anomalous metallic state in high-temperature superconducting cuprates is masked by the onset of superconductivity near a quantum critical point. Use of high magnetic fields to…
Subsurface bending and reorientation of tilted vortex lattices in the bulk due to Coulomb-like repulsion at the surface
E. Herrera, I. Guillamon, J. A. Galvis +6
We study vortex lattices (VLs) in superconducting weak-pinning platelet-like crystals of -BiPd in tilted fields with a Scanning Tunneling Microscope. We show that vortices…
Mass enhancement in multiple bands approaching optimal doping in a high-temperature superconductor
C. M. Moir, Scott C. Riggs, J. A. Galvis +7
Pnictides provide an opportunity to study the effects of quantum criticality in a multi-band high temperature superconductor. Quasiparticle mass divergence near optimal doping, obs…
Magnetic field dependence of the density of states in the multiband superconductor -BiPd
E. Herrera, I. Guillamon, J. A. Galvis +8
We present very low temperature scanning tunneling microscopy (STM) experiments on single crystalline samples of the superconductor -BiPd. We find a single fully isotropic s…
Zero-bias conductance peak in detached flakes of superconducting 2H-TaS probed by scanning tunneling spectroscopy
J. A. Galvis, L. Chirolli, I. Guillamon +5
We report an anomalous tunneling conductance with a zero bias peak in flakes of superconducting 2H-TaS detached through mechanical exfoliation. To explain the observed phenomen…
Scanning Tunneling Microscopy in the superconductor LaSb2
J. A. Galvis, H. Suderow, S. Vieira +2
We present very low temperature (0.15 K) scanning tunneling microscopy and spectroscopy experiments in the layered superconductor LaSb. We obtain topographic microscopy images…
Magnetic and superconducting phase diagrams in ErNi2B2C
J. A. Galvis, M. Crespo, I. Guillamón +5
We present measurements of the superconducting upper critical field Hc2(T) and the magnetic phase diagram of the superconductor ErNi2B2C made with a scanning tunneling microscope (…
Scanning tunneling spectroscopy of layers of superconducting 2H-TaSe: Evidence for a zero bias anomaly in single layers
J. A. Galvis, P. Rodière, I. Guillamón +7
We report a characterization of surfaces of the dichalcogenide TaSe using scanning tunneling microscopy and spectroscopy (STM/S) at 150 mK. When the top layer has the 2H struct…
Scanning microscopies of superconductors at very low temperatures
V. Crespo, A. Maldonado, J. A. Galvis +7
We discuss basics of scanning tunneling microscopy and spectroscopy (STM/S) of the superconducting state with normal and superconducting tips. We present a new method to measure th…