65 citations · 156 across the 22 of their papers we have counts for
19 papers · 1 filter
Dimensional crossovers in the Gaussian critical fluctuations above of two-layer and three-layer superconductors
A. S. Viz, M. M. Botana, J. C. Verde +1
By using a Ginzburg-Landau functional in the Gaussian approximation, we calculate the energy of superconducting fluctuations above the transition, at zero external magnetic field,…
Calculations of some doping nanostructurations and patterns improving the functionality of high-temperature superconductors for bolometer device applications
J. C. Verde, A. S. Viz, M. M. Botana +2
We calculate the effects of doping nanostructuration and the patterning of thin films of high-temperature superconductors (HTS) with the aim of optimizing their functionality as se…
A scenario for the critical fluctuations near the transition of few-bilayer films of high-temperature cuprate superconductors
M. M. Botana, M. V. Ramallo
We study the critical fluctuations near the resistive transition of very thin films of high-temperature cuprate superconductors composed of a number of only a few unit cells of…
Superconductivity in Nanosystems: A Fruitful Path to New Phenomenology in Quantum Materials
M. V. Ramallo
We reason that various recent works by different groups reporting new phenomenologies in superconductors can be understood in a unifying way as instances of the appearance of novel…
Design of structured LaSrCuO films as superconducting transition-edge sensors at 4.2K
M. M. Botana, A. S. Viz, M. V. Ramallo
We calculate the effects of carrier-density structuration and patterning on thin films of the cuprate superconductor LaSrCuO, in order to optimize its functiona…
Magnetic field dependence of the precursor diamagnetism in La superconductors with magnetic Pr impurities
F. Soto, C. Carballeira, J. M. Doval +6
The interplay between fluctuating Cooper pairs and magnetic impurities in conventional BCS low-Tc superconductors has been studied through measurements of the magnetic field depend…
Critical temperatures for superconducting phase-coherence and condensation in La2-xSrxCuO4
N. Coton, M. V. Ramallo, F. Vidal
A pivotal ongoing debate about cuprate superconductors (HTS) is the location of the transition temperatures for the superconducting wave function phase coherence and condensation,…
New results on the anomalous precursor diamagnetism in the underdoped La1.9Sr0.1CuO4 superconductor
J. D. Dancausa, N. Cotón, J. M. Doval +5
The new results summarized here, including a brief comparison with the paraconductivity, further suggest that the anomalous precursor (above Tc) diamagnetism recently observed in t…
Precursor superconducting diamagnetism in YBa2Cu3O7-d with in-plane or intercalated magnetic impurities
F. Soto, N. Cotón, J. D. Dancausa +8
The magnetization around the superconducting transition was measured in YBa2Cu3O7-d with magnetic impurities in the CuO2 layers (Cu substituted by Zn or Ni) or between them (Y subs…
Comment on 'Diamagnetism and Cooper pairing above Tc in cuprates'
R. I. Rey, A. Ramos-Álvarez, J. Mosqueira +2
It is shown that the magnetization rounding measured by L. Li and coworkers above the superconducting transition in optimally doped YBa2Cu3O7-d crystals under magnetic fields up to…
Comment on "Phase fluctuation superconductivity in overdoped La2-xSrxCuO4"
Jesús Mosqueira, Manuel V. Ramallo, Félix Vidal
By measuring the in-plane resistivity as a function of temperature and magnetic field in overdoped La2-xSrxCuO4 (LSCO) superconductors, in a recent Letter Rourke et al. [Nature Phy…
Effects of critical temperature inhomogeneities on the voltage-current characteristics of a planar superconductor near the Berezinskii-Kosterlitz-Thouless transition
Noelia Coton, Manuel V. Ramallo, Felix Vidal
We analyze numerically how the voltage-current (V-I) characteristics near the so-called Berezinskii-Kosterlitz-Thouless (BKT) transition of 2D superconductors are affected by a ran…
Comment on "High Field Studies of Superconducting Fluctuations in High-Tc Cuprates. Evidence for a Small Gap distinct from the Large Pseudogap"
Manuel V. Ramallo, Carlos Carballeira, Ramon I. Rey +2
By using high magnetic field data to estimate the background conductivity, Rullier-Albenque and coworkers have recently published [Phys.Rev.B 84, 014522 (2011)] experimental eviden…
Breakdown by a magnetic field of the superconducting fluctuations in the normal state: A simple phenomenological explanation
Manuel V. Ramallo, Jesus Mosqueira, Carlos Carballeira +2
We first summarize our recent observations, through magnetization measurements in different low-Tc superconductors, of a rather sharp disappearance of the superconducting fluctuati…
Measurements of the doping effects on the in-plane paraconductivity in cuprate superconductors
Felix Vidal, Manuel V. Ramallo, Gonzalo Ferro +1
We will summarize here some of our measurements of the superconducting fluctuations effects on the in-plane electrical resistivity (the so-called in-plane paraconductivity) in La_{…
Observation of enhanced fluctuation diamagnetism in lanthanum superconductors with dilute magnetic impurities
Felix Soto, Lucia Cabo, Jesus Mosqueira +3
The fluctuation-induced diamagnetism (FD), associated with the presence of precursor Cooper pairs in the normal state, has been measured in lanthanum with dilute magnetic (Pr) and…
Breakdown by a magnetic field of the superconducting fluctuations in the normal state in Pb_{1-x}In_x alloys
Felix Soto, Carlos Carballeira, Jesus Mosqueira +4
The effects induced on the magnetization by coherent fluctuating Cooper pairs in the normal state have been measured in Pb_{1-x}In_x alloys up to high magnetic fields, of amplitude…
The in-plane paraconductivity in La_{2-x}Sr_xCuO_4 thin film superconductors at high reduced-temperatures: Independence of the normal-state pseudogap
Severiano R. Curras, Gonzalo Ferro, M. Teresa Gonzalez +5
The in-plane resistivity has been measured in (LSxCO) superconducting thin films of underdoped (), optimally-doped () and overdoped ($x=0.2…
On the consequences of the uncertainty principle on the superconducting fluctuations well inside the normal state
Felix Vidal, Carlos Carballeira, Severiano R. Curras +4
We first argue that the collective behaviour of the Cooper pairs created by thermal fluctuations well above the superconducting transition temperature, Tc, is dominated by the unce…