Publication
On Local Pairs vs. BCS: Quo Vadis High- T-c Superconductivity
Publications associées (35)
Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe
Henrik Moodysson Rønnow, Bastien Dalla Piazza, Arash Alahgholipour Omrani, Nikolay Tsyrulin
High-temperature superconductivity remains arguably the greatest enigma of condensed matter physics. The discovery of iron-based high-temperature superconductors [1, 2] has renewed the importance of understanding superconductivity in materials susceptible ...
Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2012Superconductor–insulator transition in La2 − xSrxCuO4 at the pair quantum resistance
Davor Pavuna, Guy Joseph Günter Dubuis, Ivan Bozovic
High-temperature superconductivity in copper oxides arises when a parent insulator compound is doped beyond some critical concentration; what exactly happens at this superconductor–insulator transition is a key open question1. The cleanest approach is to t ...
2011Observation of shell effects in superconducting nanoparticles of Sn
In a zero-dimensional superconductor, quantum size effects(1,2) (QSE) not only set the limit to superconductivity, but are also at the heart of new phenomena such as shell effects, which have been predicted to result in large enhancements of the supercondu ...
2010Nonmonotonic pseudogap in high-T-c cuprates
The mechanism of high-temperature superconductivity has not been resolved for so long because the normal state of cuprates, which exhibits enigmatic pseudogap phenomena, is not yet understood. We performed careful temperature- and momentum-resolved photoem ...
2009Single-photon and photon-number-resolving detectors based on superconducting nanowires
Nanowire superconducting single photon detectors (SSPDs) [1] are characterized by very high sensitivity in the near infrared (detection efficiency η up to 30%, for a dark count rate DK of few Hz), speed (up to ∼1 GHz repetition rate) and time resolution (j ...
EPFL2009HREM studies of twins in Cd1−xZnxTe (x ≈ 0.04) thin films grown by molecular beam epitaxy
The microstructure of ferroelectric Cd1−xZnxTe (CZT) thin films with x ≈ 0.04 grown by molecular beam epitaxy has been studied by means of cross sectional high-resolution transmission electron microscopy (HREM). High- density {1 1 1} lamellar twins are fou ...
2009Kinks in the angle resolved photoemission and inelastic x-ray spectra of high temperature superconductors
Though the high superconducting transition temperature (Tc) is the most interesting technological aspect of high temperature superconductors, the complex way in which the spin, lattice and electronic degrees of freedom interplay, makes them of the highest ...
EPFL2008Three-dimensional dispersion induced by extreme tensile strain in La_(2−x)Sr_xCuO_4 films
Davor Pavuna, Slobodan Mitrovic, Dominique Cloëtta, Claudia Cancellieri, Mike Abrecht
The electronic band structure probed by angle-resolved photoemission spectroscopy on thin epitaxial La_(2−x)Sr_(x)CuO_(4) films under extreme tensile strain shows anomalous features compatible with c-axis dispersion. This result is in striking contrast wit ...
200670 kA high temperature superconductor current lead operation at 80 K
For the superconducting magnet system of the International Thermonuclear Experimental Reactor, ITER, 60 current leads for a total current of more than 2500 kA are needed. To reduce the resultant large refrigerator load at 4.5 K, High Temperature Supercondu ...
2006Properties of La2-xSrxCuO4 under epitaxial strain
The subject of this thesis is the growth and analysis of high temperature superconductor (HTSC) films and the study of their electronic structure and properties. In particular, the effect of epitaxial strain is investigated, predominantly by means of in-si ...
EPFL2005