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The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape conspires to bring them in close proximity to each other.…

Strongly Correlated Electrons · Physics 2015-05-20 Sunil Nair , O. Stockert , U. Witte , M. Nicklas , R. Schedler , K. Kiefer , J. D. Thompson , A. D. Bianchi , Z. Fisk , S. Wirth , F. Steglich

We explore various temperature dependencies and thermodynamic quantities of a mean field model of a ferromagnetic-superconducting system. The starting point for this model is based on an s-wave pairing scheme in the singlet channel of the…

Superconductivity · Physics 2009-11-10 Jason Jackiewicz , Krastan B. Blagoev , Kevin S. Bedell

The split superconducting transition of up-spin and down-spin electrons on the background of ferromagnetism is studied within the framework of a recent model that describes the coexistence of ferromagnetism and superconductivity induced by…

Superconductivity · Physics 2009-11-10 D. Belitz , T. R. Kirkpatrick

Superconductivity is a quantum phenomena arising, in its simplest form, from pairing of fermions with opposite spin into a state with zero net momentum. Whether superconductivity can occur in fermionic systems with unequal number of two…

Superconductivity · Physics 2015-06-22 H. Mayaffre , S. Kramer , M. Horvatić , C. Berthier , K. Miyagawa , K. Kanoda , V. F. Mitrović

Incomplete cancellation of collinear antiparallel spins gives rise to ferrimagnetism. Even if the oppositely polarized spins are owing to the equal number of a single magnetic element having the same valence state, in principle, a…

High resolution measurements of the dynamic magnetic susceptibility are reported for ferromagnetic re-entrant superconductor, ErRh$_{4}$B$_{4}$. Detailed investigation of the coexisting regime reveals unusual temperature-asymmetric and…

Strongly Correlated Electrons · Physics 2009-02-02 Ruslan Prozorov , Matthew D. Vannette , Stephanie A. Law , Sergey L. Bud'ko , Paul C. Canfield

Altermagnets are a newly identified class of magnets with nodal spin-split band structures, providing a fertile platform for studying unconventional superconductivity and intertwined orders. Here we investigate multicomponent…

Superconductivity · Physics 2026-03-06 Xuan Zou , Rafael M. Fernandes , Eduardo Fradkin

The appearance of magnetization during the application of mechanical stress and the creation of elastic deformation during the application of a magnetic field are two fundamental properties of piezomagnetic materials. The symmetry of…

Superconductivity · Physics 2021-06-16 V. P. Mineev

We give a review of recent results on the heavy fermion superconductor CeRhIn$_5$ which presents ideal conditions to study the interplay of antiferromagnetism and superconductivity. The main results are the appearance of domains of…

Strongly Correlated Electrons · Physics 2009-11-30 Georg Knebel , Dai Aoki , Jacques Flouquet

The intimate connection between magnetism and superconducting pairing routinely plays a central role in determining the occurrence of unconventional superconducting states. In high-transition-temperature (high-Tc) stripe-ordered cuprate…

Unconventional superconductivity (SC) is said to occur when Cooper pair formation is dominated by repulsive electron-electron interactions, so that the symmetry of the pair wavefunction is other than isotropic s-wave. The strong, on-site,…

Superconductivity · Physics 2016-06-22 J. C. Séamus Davis , Dung-Hai Lee

A microscopic mean-field theory of the phase coexistence between ferromagnetism and superconductivity in the weakly ferromagnetic itinerant electron system is constructed, while incorporating a realistic mechanism for superconducting…

Strongly Correlated Electrons · Physics 2007-05-23 Andriy H. Nevidomskyy

We consider a superconductor-ferromagnet (S/F) structure and assume that above the superconducting transition temperature $T_{c}$ the magnetic moment exists only in F. {In a simple model of the ferromagnet (the exchange field is of the…

Superconductivity · Physics 2009-11-10 F. S. Bergeret , A. F. Volkov , K. B. Efetov

High-temperature superconductivity in the iron-based materials emerges from, or sometimes coexists with, their metallic or insulating parent compound states. This is surprising since these undoped states display dramatically different…

Superconductivity · Physics 2012-10-05 Pengcheng Dai , Jiangping Hu , Elbio Dagotto

The current status and prospects of research on ferromagnetism in semiconductors are reviewed. The question of the origin of ferromagnetism in europium chalcogenides, chromium spinels and, particularly, in diluted magnetic semiconductors is…

Materials Science · Physics 2009-11-07 Tomasz Dietl

Spin dependence of quasiparticle mass has been observed recently in CeCoIn5 and other systems. It emerges from strong electronic correlations in a magnetically polarized state and was predicted earlier. Additionally, the…

Strongly Correlated Electrons · Physics 2008-08-27 J. Spalek , M. M. Maska , M. Mierzejewski , J. Kaczmarczyk

Intermetallic compounds containing f-electron elements display a wealth of superconducting phases, that are prime candidates for unconventional pairing with complex order parameter symmetries. For instance, superconductivity has been found…

Superconductivity · Physics 2010-01-19 C. Pfleiderer

We consider ferromagnetic particles embedded into a superconductor and study the screening of their magnetic moments by the spins of the Cooper pairs in the superconductor. It is shown that a magnetic moment opposite to the one of the…

Superconductivity · Physics 2009-11-10 F. S. Bergeret , A. F. Volkov , K. B. Efetov

We propose that a pseudospin ferromagnetic (i.e inter-wire coherent) state can exist in a system of two parallel wires of finite width in the presence of a perpendicular magnetic field. This novel quantum many-body state appears when the…

Strongly Correlated Electrons · Physics 2007-05-23 D. -W. Wang , E. G. Mishchenko , E. Demler

Bulk magnetization, transport and neutron scattering measurements were performed to investigate the electronic and magnetic properties of a polycrystalline sample of the newly discovered ferromagnetic superconductor,…