E. Koller

Patterning of ultrathin YBCO nanowires using a new focused-ion-beam process

Manufacturing superconducting circuits out of ultrathin films is a challenging task when it comes to pattern complex compounds, which are likely to be deteriorated by the patterning process. With the purpose of developing high-Tc superconducting photon detectors, we designed a novel route to pattern ultrathin YBCO films down to the nanometric scale. We believe that our method, based on a specific use of a focused ion beam, consists in locally implanting Ga 3+ ions and/or defects instead of etching the film. This protocol could be of interest to engineer high-Tc superconducting devices (SQUIDS, SIS/SIN junctions, Josephson junctions), as well as to treat other sensitive compounds.

Current-induced highly dissipative domains in high Tc thin films

We have investigated the resistive response of high-

Polaronic signature in the metallic phase of La0.7Ca0.3MnO3 films detected by scanning tunneling spectroscopy

{T}_{c}

Homogeneous strain-relaxation effects in La0.67Ca0.33MnO3 films grown on NdGaO3

thin films submitted to a high density of current. For this purpose, current pulses were applied into bridges made of

Growth of SrCuO2 epitaxial thin films

{\mathrm{Nd}}_{1.15}{\mathrm{Ba}}_{1.85}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}

Highly Dissipative State of YBa2Cu3O7 Thin Films at Very Large Current Densities

and

Epitaxial growth and properties of (CO3) stabilised BaCuO2 superconducting thin films

{\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}.

Magnetism, superconductivity, and coupling in cuprate heterostructures probed by low-energy muon-spin rotation

By recording the time-dependent voltage, we observe that at a certain critical current

Approaches to single photon detection

{j}^{*},

Study of the current-induced transition into a highly dissipative state: implications for the fault current limiter

a highly dissipative domain develops somewhere along the bridge. The successive formation of these domains produces stepped