380 citations · 885 across the 24 of their papers we have counts for
23 papers · 1 filter
Tunneling study in granular aluminum near the Mott metal-to-insulator transition
Aviv Glezer Moshe, Gal Tuvia, Shilo Avraham +2
We find excellent agreement between tunneling and optical conductivity gap values in superconducting granular aluminum films, up to the metal-to-insulator transition. This behavior…
Granular superconductors for high kinetic inductance and low loss quantum devices
Aviv Glezer Moshe, Eli Farber, Guy Deutscher
Granular aluminum is a promising material for high kinetic inductance devices such as qubit circuits. It has the advantage over atomically disordered materials such as NbN_x, to ma…
Optical conductivity of granular aluminum films near the Mott metal-to-insulator transition
Aviv Glezer Moshe, Eli Farber, Guy Deutscher
We report measurements of the energy gap of granular aluminum films by THz spectroscopy. We find that as the grains progressively decouple, the coupling ratio in…
Optical signatures of the superconducting Goldstone mode in granular aluminum: experiments and theory
Uwe S. Pracht, Tommaso Cea, Nimrod Bachar +7
Recent advances in the experimental growth and control of disordered thin films, heterostructures, and interfaces provide a fertile ground for the observation and characterisation…
Shaping a superconducting dome: Enhanced Cooper-pairing versus suppressed phase coherence in coupled aluminum nanograins
Uwe S. Pracht, Nimrod Bachar, Lara Benfatto +4
Deterministic enhancement of the superconducting (SC) critical temperature is a long-standing goal in material science. One strategy is engineering a material at the nanomete…
Onset of Nernst Effect Beyond the Coherence Critical Field of a Nano-Scale Granular Superconductor
Shachar Lerer, Nimrod Bachar, Guy Deutscher +1
We report measurements of the Nernst effect and of the magneto-resistance of granular aluminum films near the metal to insulator transition. These films show sharp transitions as a…
Coexistence of a triplet nodal order-parameter and a singlet order-parameter at the interfaces of ferromagnet-superconductor Co/CoO/In junctions
Shay Hacohen-Gourgy, Boaz Almog, Guy Deutscher
We present differential conductance measurements of Cobalt / Cobalt-Oxide / Indium planar junctions, 500nm x 500nm in size. The junctions span a wide range of barriers, from very l…
Origin of Weak-Link Behavior of Grain Boundaries in Superconducting Cuprates and Pnictides
Guy Deutscher
Superconducting cuprates and pnictides composed of CuO2 or AsFe planes respectively with intercalated insulating layers, are at the crossroads of three families of crystalline soli…
Local tunneling probe of (110) Y_0.95Ca_0.05Ba_2Cu_3O_7-delta thin films in a magnetic field
J. H. Ngai, R. Beck, G. Leibovitch +2
Scanning tunneling spectroscopy was performed on (110)-oriented thin films of Ca-overdoped YCaBaCuO at 4.2K, to probe the local evolution of Andre…
Bean-Livingston barrier enhancement on nodal surface of the d-wave superconductor YBa2Cu3O{7-x}
G. Leibovitch, R. Beck, A. Kohen +1
Vortex entry into (110) oriented YBaCuO films has been studied by tunneling into Andreev - Saint-James bound states, whose energy is shifted by surface currents. At…
A spatial interpretation of emerging superconductivity in lightly doped cuprates
Guy Deutscher, Pierre-Gilles de Gennes
The formation of domains comprising alternating 'hole rich' and 'hole poor' ladders recently observed by Scanning Tunneling Microscopy by Kohsaka et al., on lightly hole doped cupr…
Field Induced Nodal Order Parameter in the Tunneling Spectrum of YBaCuO Superconductor
G. Leibovitch, R. Beck, Y. Dagan +2
We report planar tunneling measurements on thin films of YBaCuO at various doping levels under magnetic fields. By choosing a special setup configuration, we have p…
Kinetic energy change with doping upon superfluid condensation in high temperature superconductors
G. Deutscher, A. F. Santander-Syro, N. Bontemps
In conventional BCS superconductors, the electronic kinetic energy increases upon superfluid condensation (the change DEkin is positive). Here we show that in the high critical tem…
Anomalous Fermi Liquid Behavior of Overdoped High-Tc Superconductors
H. Castro, G. Deutscher
According to a generic temperature vs. carrier-doping (T-p) phase diagram of high-temperature superconductors it has been proposed that as doping increases to the overdoped region…
Andreev - Saint James reflections: a probe of cuprate superconductors
Guy Deutscher
Electrical transport through a normal metal / superconductor contact at biases smaller than the energy gap can occur via the reflection of an electron as a hole of opposite wave ve…
High Quality a-axis outgrowth on c-axis YlCa1-xBa2Cu3O7-d
Guy Leibovitch, Roy Beck, Guy Deutscher
The large amplitude of the high Tc (HTS) superconducting gap is attractive for improved electronic applications. However, the study of such HTS cuprates has uncovered that unlike t…
Determination of the critical current density in the d-wave superconductor YBCO under applied magnetic fields by nodal tunneling
Roy Beck, Guy Leibovitch, Alexander Milner +2
We have studied nodal tunneling into YBa2Cu3O7-x (YBCO) films under magnetic fields. The films' orientation was such that the CuO2 planes were perpendicular to the surface with the…
Evidence for a Bulk Complex Order-Parameter in Y0.9Ca0.1Ba2Cu3O7-delta Thin Films
E. Farber, G. Deutscher, B Gorshunov +1
We have measured the penetration depth of overdoped Y0.9Ca0.1Ba2Cu3O7-delta (Ca-YBCO) thin films using two different methods. The change of the penetration depth as a function of t…
Scanning tunneling spectroscopy of a-axis YBa_2Cu_3O_7-δfilms:k-selectivity and the shape of the superconductor
A. Sharoni, G. Leibovitch, A. Kohen +4
Tunneling spectroscopy of epitaxial (100) oriented \chem{YBa_2Cu_3O_{7-δ}} films was performed using an STM at 4.2 K. On atomically smooth areas, tunneling spectra revealing clear…
Andreev reflections on Y1-xCaxBa2Cu3O7-delta evidence for an unusual proximity effect
A. Kohen, G. Leibovitch, G. Deutscher
We have measured Andreev reflections between an Au tip and Y_{1-x}Ca_{x}Ba_{2}Cu_{3}O_{7 - δ} thin films in the in-plane orientation. The conductance spectra are best fitted with a…
Study of the Order Parameter symmetry in overdoped Y1-xCaxBa2Cu3O7-delta by measurement of Andreev reflection, evidence for enhancement of the sub dominant order parameter amplitude in high transparency contacts
A. Kohen, G. Deutscher
We have measured the differential Conductance of Au/Y1-xCaxBa2Cu3O7-delta point contacts in the regime where it is dominated by Andreev reflection, which enhances its value at low…
Origin of time reversal symmetry breaking in Y(1-y)Ca(y)Ba(2)Cu(3)O(7-x)
Yoram Dagan, Guy Deutscher
We have studied the Zero Bias Conductance Peak (ZBCP) of the tunneling conductance measured on (1,1,0) oriented Y(1-y)Ca(y)Ba(2)Cu(3)O(7-x) thin films as a function of doping and o…
Thickness independence of field induced time reversal symmetry breaking in Y/sub1 Ba/sub2 Cu/sub3 O/sub7-delta thin films
Y. Dagan, G. Deutscher
We have measured the field dependence of the Zero Bias Conductance Peak (ZBCP) of tunnel junctions prepared on (110) oriented Y1Ba2Cu3O7-d films of various thickness. We have found…