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One of the common features of unconventional, magnetically mediated superconductivity as found in the heavy-fermions, high-transition-temperature (high-Tc) cuprates, and iron pnictides superconductors is that the superconductivity emerges…

We report on a microscopic study of the evolution of ferromagnetism in the Ru substituted ferromagnetic superconductor (FM SC) UCoGe crystallizing in the orthorhombic TiNiSi-type structure. For that purpose, two single crystals with…

One of the most exciting discoveries in strongly correlated systems has been the existence of a superconducting dome on heavy fermions close to the quantum critical point where antiferromagnetic order disappears. It is hard even for the…

强关联电子 · 物理学 2015-05-13 Mucio A. Continentino

The orthorhombic uranium dichalcogenide UTe$_2$ displays superconductivity below 1.7 K, with the anomalous feature of retaining 50$\%$ of normal state (ungapped) carriers, according to heat capacity data from two groups. Incoherent…

超导电性 · 物理学 2019-10-09 Alexander B. Shick , Warren E. Pickett

Within a multicomponent BCS-like framework we study the coexistence and competition of various CDW and SC order parameters in the presence of a strong ferromagnetic background. We find that the competition of unconventional CDW, also called…

超导电性 · 物理学 2007-05-23 G. Varelogiannis , P. Thalmeier , S. Tsonis

In this review article we present a survey of unconventional superconductors and their coexistence behaviour with magnetism. We focus on Ce- and U-based heavy fermion superconductors, in addition we discuss the rare earth borocarbide and…

强关联电子 · 物理学 2009-09-29 Peter Thalmeier , Gertrud Zwicknagl

The basic physics of bulk magnetic superconductors (MS) related to the problem of the coexistence of singlet superconductivity (SC) and magnetic order is reviewed. The interplay between exchange (EX) and electromagnetic (EM) interaction is…

超导电性 · 物理学 2009-11-11 Miodrag L. Kulic

In europium-based iron pnictides superconducting Fe-planes can be influenced by a Zeeman field originated from the neighboring Eu-planes. The field tends to induce spin-density waves with a ferromagnetic average which coexists with the…

超导电性 · 物理学 2022-10-20 Huai-Xiang Huang , Yu-Qian Cao , Xin Wan

Superconductivity in three dimensions is almost universally governed by Ginzburg-Landau mean field theory, with critical fluctuations typically confined to within a few percent of the transition temperature ($T_{\rm c}$). We report that the…

The symmetry approach to the description of the (P,T) phase diagram of ferromagnet superconductors with triplet pairing is developed. Taking into account the recent experimental observations made on UCoGe it is considered the case of a…

超导电性 · 物理学 2009-11-13 V. P. Mineev

Fine pressure ($P$) and magnetic field ($H$) tuning on the ferromagnetic superconductor URhGe are reported in order to clarify the interplay between the mass enhancement, low field superconductivity (SC) and field reentrant…

强关联电子 · 物理学 2015-05-13 Atsushi Miyake , Dai Aoki , Jacques Flouquet

We performed thermal conductivity measurements on a single crystal of the ferromagnetic superconductorUCoGe under magnetic field. Two different temperature dependencies of the thermal conductivity are observed, for H//b linear at low…

超导电性 · 物理学 2014-10-13 Ludovic Howald , Mathieu Taupin , Dai Aoki

UTe$_{2}$ exhibits the remarkable phenomenon of re-entrant superconductivity, whereby the zero-resistance state reappears above 40 tesla after being suppressed with a field of around 10 tesla. One potential pairing mechanism, invoked in the…

We examine the effect of classical magnetic fluctuations on the phase diagram of paramagneticallylimited two-dimensional superconductors under a Zeeman magnetic field. We derive the free energy expansion in powers of the superconducting…

超导电性 · 物理学 2015-03-13 Robert Beaird , Anton B. Vorontsov , Ilya Vekhter

A new critical behavior in unconventional superconductors and superfluids is established and described by the Wilson-Fisher renormalization-group method. For certain symmetries of order a new type of fluctuation-driven first order phase…

超导电性 · 物理学 2010-12-17 Dimo I. Uzunov

Resistivity, thermoelectric power and heat capacity are investigated in the ferromagnetic superconductor RuSr2GdCu2O8 with and without Zn substitution. The thermodynamic signatures of the ordering of the Ru moments and the paramagnetic Gd…

超导电性 · 物理学 2007-05-23 J. L. Tallon , J. W. Loram , G. V. M. Williams , C. Bernhard

In order to determine the superconducting paring state in the ferromagnetic superconductor UCoGe, ^{59}Co NMR Knight shift, which is directly related to the microscopic spin susceptibility, was measured in the superconducting state under…

超导电性 · 物理学 2014-06-12 T. Hattori , K. Karube , Y. Ihara , K. Ishida , K. Deguchi , N. K. Sato , T. Yamamura

Unconventional ferromagnetism and superconductivity in the imbalanced kagome-lattice Hubbard model are investigated by the mean-field theory and determinant quantum Monte Carlo method. Due to the asymmetric band structure of kagome lattice,…

强关联电子 · 物理学 2022-07-13 Chenyue Wen , Xingchuan Zhu , Ning Hao , Huaiming Guo , Shiping Feng

Lifshitz transitions are being increasingly recognised as significant in a wide variety of strongly correlated and topological materials, and understanding the origin and influence of Lifshitz transitions is leading to deeper understanding…

强关联电子 · 物理学 2023-04-17 Roos Leenen , Dai Aoki , Georg Knebel , Alexandre Pourret , Alix McCollam

We revisit the issue of superconductivity at the quantum-critical point (QCP) between a 2D paramagnet and a spin-density-wave metal with ordering momentum (\pi,\pi). This problem is highly non-trivial because the system at criticality…

超导电性 · 物理学 2015-06-11 Yuxuan Wang , Andrey V. Chubukov