175 citations · 1.3k across the 37 of their papers we have counts for
37 papers
Machine-learning test of the single-ion model for excitations in cuprates
Maryia Zinouyeva, Leonardo Martinelli, Riccardo Arpaia +12
We investigate excitations in Resonant Inelastic X-ray Scattering spectra of YBaCuO and LaCuO using the local single-ion model. The data are analyzed by co…
Unveiling the Interplay of Charge and Magnetic Excitations in HgBaCaCuO
Karn Rongrueangkul, Martina Fedele, Leonardo Martinelli +10
Unraveling the mechanism that binds electrons into Cooper pairs in cuprate high-temperature superconductors remains one of the most fundamental challenges in condensed-matter physi…
Electron-phonon coupling revealed by charge density fluctuations in cuprate superconductors
Martina Fedele, Giacomo Merzoni, Marco Moretti Sala +6
Electron-phonon coupling (EPC) governs lattice dynamics, charge transport, and collective electronic phases in quantum materials. In several families of unconventional superconduct…
Spin and orbital excitations in undoped infinite layers: a comparison between superconducting PrNiO2 and insulating CaCuO2
Francesco Rosa, Hoshang Sahib, Giacomo Merzoni +9
Infinite-layer nickelates are among the most promising cuprate-akin superconductors, although relevant differences from copper oxides have been reported. Here, we present momentum-…
Differentiation of Site-Specific Symmetry Breaking Orders in YPrBaCuO
L. Martinelli, S. Rüdiger, I. Bialo +6
Solid matter is classified through symmetry of ordering phenomena. Experimentally, this approach is straightforward, except when distinct orderings occur with identical or almost i…
Boosting superconductivity in ultrathin YBaCuO films via nanofaceted substrates
Eric Wahlberg, Riccardo Arpaia, Debmalya Chakraborty +7
In cuprate high-temperature superconductors the doping level is fixed during synthesis, hence the charge carrier density per CuO plane cannot be easily tuned by conventional ga…
The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
Maryia Zinouyeva, Rolf Heid, Giacomo Merzoni +16
The experimental determination of the magnitude and momentum dependence of electron-phonon coupling (EPC) is an outstanding problem in condensed matter physics. The intensity of ph…
Spin excitations in Nd1-xSrxNiO2 and YBa2Cu3O7-delta: the influence of Hubbard U
Francesco Rosa, Leonardo Martinelli, Guillaume Krieger +10
We use Resonant Inelastic X-ray Scattering (RIXS) to compare the doping dependence of magnetic excitations of an Infinite-Layer nickelate to those of a prototypical superconducting…
Charge response function probed by resonant inelastic x-ray scattering: the signature of electronic gaps of YBaCuO
Giacomo Merzoni, Leonardo Martinelli, Lucio Braicovich +6
In strongly correlated systems the complete determination of the dynamical susceptibility is of special relevance because of the entwinement of the spin and char…
Tuning the ground state of cuprate high-critical-temperature superconducting thin films by nanofaceted substrates
G. Mirarchi, R. Arpaia, E. Wahlberg +7
Anisotropic transport properties have been assessed in a number of cuprate superconductors, providing evidence for a nematic state. Here, we analyze recent experimental data for ul…
Collective nature of orbital excitations in layered cuprates in the absence of apical oxygens
Leonardo Martinelli, Krzysztof Wohlfeld, Jonathan Pelliciari +19
We have investigated the 3d orbital excitations in CaCuO2 (CCO), Nd2CuO4 (NCO), and La2CuO4 (LCO) using high-resolution resonant inelastic x-ray scattering. In LCO they behave as w…
Identification of a Critical Doping for Charge Order Phenomena in Bi-2212 Cuprates via RIXS
Haiyu Lu, Makoto Hashimoto, Su-Di Chen +16
Identifying quantum critical points (QCPs) and their associated fluctuations may hold the key to unraveling the unusual electronic phenomena observed in cuprate superconductors. Re…
Signature of quantum criticality in cuprates by charge density fluctuations
R. Arpaia, L. Martinelli, M. Moretti Sala +17
The universality of the strange metal phase in many quantum materials is often attributed to the presence of a quantum critical point (QCP), a zero-temperature phase transition rul…
Engineering underdoped CuO nanoribbons in nm-thick -axis YBaCuO films
Riccardo Arpaia, Núria Alcalde-Herraiz, Andrea D'Alessio +5
In underdoped cuprate high superconductors, various local orders and symmetry breaking states, in addition to superconductivity, reside in the CuO planes. The…
Doping dependence of the upper critical field in untwinned YBaCuO thin films
E. Wahlberg, R. Arpaia, A. Kalaboukhov +2
We report on measurements of the doping dependence of the upper critical field in 50 nm thick YBaCuO films. The films are untwinned and are characterized…
Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates
Yingying Peng, Leonardo Martinelli, Qizhi Li +21
While electron-phonon coupling (EPC) is crucial for Cooper pairing in conventional superconductors, its role in high- superconducting cuprates is debated. Using resonant inela…
Fractional spin excitations in the infinite-layer cuprate CaCuO
Leonardo Martinelli, Davide Betto, Kurt Kummer +6
We use resonant inelastic x-ray scattering (RIXS) to investigate the magnetic dynamics of the infinite-layer cuprate CaCuO2. We find that close to the (1/2,0) point the single magn…
Charge order at high temperature in cuprate superconductors
Riccardo Arpaia, Giacomo Ghiringhelli
The presence of different electronic orders other than superconductivity populating the phase diagram of cuprates suggests that they might be the key to disclose the mysteries of t…
Mapping the phase diagram of a YBaCuO nanowire through electromigration
Edoardo Trabaldo, Alexei Kalaboukhov, Riccardo Arpaia +3
We use electromigration (EM) to tune the oxygen content of YBaCuO (YBCO) nanowi\-res. During EM, the dopant oxygen atoms in the nanowire are moved under the combine…
Restored strange metal phase through suppression of charge density waves in underdoped YBaCuO
E. Wahlberg, R. Arpaia, G. Seibold +10
The normal state of optimally doped cuprates is dominated by the "strange metal" phase that shows a linear temperature () dependence of the resistivity persisting down to the lo…
Mobile orbitons in CaCuO: crucial role of the Hund's exchange
Roberto Fumagalli, Jonas Heverhagen, Davide Betto +9
We investigate the Cu edge resonant inelastic x-ray scattering (RIXS) spectra of a quasi-1D antiferromagnet CaCuO. In addition to the magnetic excitations, which are…
Properties of Grooved Dayem Bridge based YBaCuO Superconducting Quantum Interference Devices and Magnetometers
E. Trabaldo, S. Ruffieux, E. Andersson +7
The transport properties of a YBaCuO superconducting quantum interference device (SQUID) based on grooved Dayem bridge weak links are studied as a function of tempe…
Fabrication and electrical transport characterization of high quality underdoped YBaCuO nanowires
Eric Andersson, Riccardo Arpaia, Edoardo Trabaldo +2
We present the fabrication and electrical transport characterization of underdoped YBaCuO nanowires. The nanowires have been realized without any protective capping…
SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer
Edoardo Trabaldo, Christoph Pfeiffer, Eric Andersson +5
We report noise measurements performed on a SQUID magnetometer implementing Grooved Dayem nanobridge of YBCO as weak-links. The SQUID shows magnetic flux noise as low as 10 /…