نتایج جستجو برای: iron based superconductor
تعداد نتایج: 3065996 فیلتر نتایج به سال:
Abstract Illumination of light on matter normally causes heating and destroys the ordered ground states. Despite this common understanding, recent advances in ultrafast sources have enabled non-thermal control quantum phases. Here, we report light-induced enhancement superconductivity a thin film an iron chalcogenide FeSe 0.5 Te , which exhibits multiple condensates associated with multi-orbita...
We investigate the normal state of the "11" iron-based superconductor FeSe0.42Te0.58 by angle-resolved photoemission. Our data reveal a highly renormalized quasiparticle dispersion characteristic of a strongly correlated metal. We find sheet dependent effective carrier masses between approximately 3 and 16m{e} corresponding to a mass enhancement over band structure values of m{*}/m{band} approx...
We investigated the electron-pairing mechanism in an iron-based superconductor, iron selenide (FeSe), using scanning tunneling microscopy and spectroscopy. Tunneling conductance spectra of stoichiometric FeSe crystalline films in their superconducting state revealed evidence for a gap function with nodal lines. Electron pairing with twofold symmetry was demonstrated by direct imaging of quasipa...
The emergence of nematic electronic states accompanied by a structural phase transition is a recurring theme in many correlated electron materials, including the high-temperature copper oxide- and iron-based superconductors. We provide evidence for nematic electronic states in the iron-chalcogenide superconductor FeSe0.4Te0.6 from quasi-particle scattering detected in spectroscopic maps. The sy...
The onset of superconductivity at the transition temperature is marked by the onset of order, which is characterized by an energy gap. Most models of the iron-based superconductors find a sign-changing (s±) order parameter [1-6], with the physical implication that pairing is driven by spin fluctuations. Recent work, however, has indicated that LiFeAs has a simple isotropic order parameter [7-9]...
The unconventional superconductivity in the newly discovered iron-based superconductors is intimately related to its multiband/multiorbital nature. Here we report the comprehensive orbital characters of the low-energy three-dimensional electronic structure in BaFe 1.85 Co 0.15 As 2 by studying the polarization and photon-energy dependence of angle-resolved photoemission data. While the distribu...
D.G. Porter, ∗ E. Cemal, 2 D.J. Voneshen, K. Refson, M.J. Gutmann, A. Bombardi, A.T. Boothroyd, A. Krzton-Maziopa, E. Pomjakushina, K. Conder, and J.P. Goff Department of Physics, Royal Holloway, University of London, Egham, TW20 0EX, UK Institut Laue-Langevin, BP156, F-38042 Grenoble Cedex 9, France ISIS, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0Q...
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