88 citations · 476 across the 22 of their papers we have counts for
21 papers
Pressure-tuning of electronic structure of CeTe3 probed by femtosecond collective mode spectroscopy
Chandra V. Kotyada, Priyanka Yogi, Amon P. Lanz +8
We use femtosecond optical spectroscopy to study the evolution of coherent order-parameter dynamics in the prototypical charge-density-wave (CDW) system CeTe3 under hydrostatic pre…
Bridging atomic and mesoscopic length scales with Replica Scanning Tunneling Microscopy: Visualizing the atomic lattice of UTe and the atomic scale superconducting gap modulations of FeSe close to micron length scales
Miguel Águeda Velasco, Jose D. Bermúdez-Pérez, Pablo García Talavera +16
Scanning Tunneling Microscopy is a cornerstone technique for visualizing the electronic density of states with atomic resolution (typically below 0.1 nm). While the field of view o…
Exploring Structural and Electronic Properties of Topological Insulator/Graphene Nano-heterostructures
Valentina Gallardo, Barbara Arce, Francisco Muñoz +5
There is great interest in the study of topological insulator-based heterostructures due to expected emerging phenomena. However, a challenge of topological insulator (TI) research…
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…
Experimental observation of metallic states with different dimensionality in a quasi-1D charge density wave compound
P. Rezende-Gonçalves, M. Thees, J. Rojas Castillo +14
TaTe is a quasi-1D tetrachalcogenide that exhibits a CDW instability caused by a periodic lattice distortion. Recently, pressure-induced superconductivity has been achieved in…
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…
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…
Formation of buried domain walls in the ultrafast transition of SmTe
M. Trigo, P. Giraldo-Gallo, J. N. Clark +13
We study ultrafast x-ray diffraction on the charge density wave (CDW) of SmTe using an x-ray free electron laser. The CDW peaks show that photoexcitation with near-infrared pum…
Magnetic breakdown and charge density wave formation: a quantum oscillation study of the rare-earth tritellurides
P. Walmsley, S. Aeschlimann, J. A. W. Straquadine +5
The rare-earth tritellurides (Te, where = La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Y) form a charge density wave state consisting of a single unidirectional charge de…
A sharp increase in the density of states in PbTe approaching a saddle point in the band structure
P. Walmsley, D. M. Abrams, J. Straquadine +4
PbTe is a leading mid-range thermoelectric material with a that has been enhanced by, amongst other methods, band engineering. Here we present an experimental study of the Hal…
Coherent order parameter dynamics in SmTe
M. Trigo, P. Giraldo-Gallo, M. E. Kozina +13
We present a combined ultrafast optical pump-probe and ultrafast x-ray diffraction measurement of the CDW dynamics in SmTe at 300 K. The ultrafast x-ray diffraction measurement…
Direct spectroscopic evidence for mixed-valence Tl in the low carrier-density superconductor PbTlTe
P. Walmsley, C. Liu, A. D. Palczewski +4
Upon doping with Tl the narrow band-gap semiconductor PbTe exhibits anomalously high temperature superconductivity despite a very low carrier density as well as signatures of the K…
Evidence of incoherent carriers associated with resonant impurity levels and their influence on superconductivity in the anomalous superconductor PbTlTe
P. Giraldo-Gallo, P. Walmsley, B. Sangiorgio +9
We present a combined experimental and theoretical study of the evolution of the Fermi surface of the anomalous superconductor PbTlTe as a function of thallium concentr…
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…
Charge density wave modulation and gap measurements in CeTe
Uros Ralevic, Nenad Lazarevic, Andreas Baum +7
We present a study of charge density wave (CDW) ordering in CeTe at room temperature using a scanning tunneling microscope and Raman spectroscopy. Two characteristic CDW orderi…
Fermi surface evolution of Na-doped PbTe studied through density functional theory calculations and Shubnikov-de Haas measurements
P. Giraldo-Gallo, B. Sangiorgio, P. Walmsley +5
We present a combined experimental and theoretical study of the evolution of the low-temperature Fermi surface of lead telluride, PbTe, when holes are introduced through sodium sub…
Classification of Collective Modes in a Charge Density Wave by Momentum-Dependent Modulation of the Electronic Band Structure
D. Leuenberger, J. A. Sobota, S. -L. Yang +7
We present time- and angle-resolved photoemission spectroscopy measurements on the charge density wave system CeTe. Optical excitation transiently populates the unoccupied ba…
Transfer of spectral weight across the gap of Sr2IrO4 induced by La doping
V. Brouet, J. Mansart, L. Perfetti +8
We study with Angle Resolved PhotoElectron Spectroscopy (ARPES) the evolution of the electronic structure of Sr2IrO4, when holes or electrons are introduced, through Rh or La subst…
Wave vector dependent electron-phonon coupling drives charge-density-wave formation in TbTe3
M. Maschek, S. Rosenkranz, R. Heid +4
We present a high energy-resolution inelastic x-ray scattering investigation of the soft phonon mode in the charge-density-wave system TbTe. We analyze our data based on lattic…
Disorder Driven Metal-Insulator Transition in BaPbBiO and Inference of Disorder-Free Critical Temperature
Katherine Luna, Paula Giraldo-Gallo, Theodore Geballe +2
We performed point-contact spectroscopy tunneling measurements on single crystal BaPbBiO for , , , and at temperatures ranging from …