Antiferromagnetic order and spin dynamics in iron-based superconductors

By P. Dai. 2015

541 citations recorded by the source corpus.

High-transition temperature (high-$T_c$) superconductivity in the iron pnictides/chalcogenides emerges from the suppression of the static antiferromagnetic order in their parent compounds, similar to copper oxides superconductors. This raises a fundamental question concerning the role of magnetism in the superconductivity of these materials. Neutron scattering, a powerful probe to study the magnetic order and spin dynamics, plays an essential role in determining the relationship between magnetism and superconductivity in high-$T_c$ superconductors. The rapid development of modern neutron time-of-flight spectrometers allows a direct determination of the spin dynamical properties of iron-based superconductors throughout the entire Brillouin zone. In this review, we present an overview of the neutron scattering results on iron-based superconductors, focusing on the evolution of spin excitation spectra as a function of electron/hole-doping and isoelectronic substitution. We compare spin dynamical properties of iron-based superconductors with those of copper oxide and heavy fermion superconductors, and discuss the common features of spin excitations in these three families of unconventional superconductors and their relationship with superconductivity.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/67ae4d8e9f02d42c73b1017e571857186e315846

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In Condensed Matter Physics

1. A. Manchon
2. Peter Zoller
3. J. Moore
4. Bernardo Spagnolo
5. Davide Valenti
6. Y. Tserkovnyak
7. T. Ono
8. V. Baltz

In Electronic, Optical and Magnetic Materials

1. Peter Zoller
2. J. Moore
3. Y. Tserkovnyak
4. Bernhard Keimer

Citations in the corpus

• Geometry of quantum phase transitions (2019, background): “The dynamical susceptibility is a well studied quantity which has been observed experimentally in a wide variety of materials [339, 340, 341, 342, 343, 344].”
• The physics of quantum materials (2017, background): “Electronic correlations manifest themselves in ubiquitous, strong antiferromagnetic spin fluctuations 45 whose key influence on superconductivity is documented by their strong reaction to the onset of superconductivity, and by a sign reversal of the superconducting order parameter in Fermi surface…”
• Antiferromagnetic spintronics (2016, background): “The nature of these exotic phases may hold the key to high-Tc superconductivity (Dai, 2015).”
• Measuring multipartite entanglement through dynamic susceptibilities (2015, background): “Specifically, an underlying antiferromagnetic critical point [44] will show quantum-critical scaling of entanglement, which may also be tested in cold atomic-gas experiments [56, 57].”