Structure–property relationships of iron arsenide superconductors
نویسندگان
چکیده
منابع مشابه
Structure–property relationships of iron arsenide superconductors
Iron based superconductors sent material scientists into a renewed excitement reminiscent of the time when the first high-Tc superconductors were discovered 25 years ago. This feature article reviews relationships between structural chemistry and magnetic as well as superconducting properties of iron arsenide compounds, which are outstandingly rich and uniquely coupled. Particular attention is ...
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The distribution of valence electrons in metals usually follows the symmetry of the underlying ionic lattice. Modulations of this distribution often occur when those electrons are not stable with respect to a new electronic order, such as spin or charge density waves. Electron density waves have been observed in many families of superconductors, and are often considered to be essential for supe...
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We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctuations of emerging nematic degrees of freedom. Both the softening of the lattice in the normal, tetragonal phase as well as its hardening in the superconducting phase are consistently described by our model. Our result...
متن کاملLeggett mode in a strong-coupling model of iron arsenide superconductors
F. J. Burnell,1,2,3 Jiangping Hu,4 Meera M. Parish,5,6 and B. Andrei Bernevig1,5 1Department of Physics, Princeton University, Princeton, New Jersey 08544, USA 2Kavli Institute for Theoretical Physics, Santa Barbara, California 93106, USA 3All Souls College, Oxford OX14AL, United Kingdom 4Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA 5Princeton Center for Theoreti...
متن کاملComparative studies of the scanning tunneling spectra in cuprate and iron-arsenide superconductors
We report scanning tunneling spectroscopic studies of cuprate and iron-arsenic superconductors, including YBa2Cu3O7− (Y-123, Tc = 93 K), Sr0.9La0.1CuO2 (La-112, Tc = 43 K), and the “122” compounds Ba(Fe1−xCox)2As2 (Co-122 with x = 0.06, 0.08, 0.12 for Tc = 14, 24, 20 K). In zero field (H = 0), spatially homogeneous coherence peaks at energies = ±SC flanked by spectral “shoulders” at ±eff ...
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ژورنال
عنوان ژورنال: Journal of Materials Chemistry
سال: 2011
ISSN: 0959-9428,1364-5501
DOI: 10.1039/c1jm12318a