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The crystal structure determines both the Fermi surface and pairing symmetry of the superconducting metals. It is demonstrated in the framework of the general phenomenological approach that this is of the primary importance for the…

Superconductivity · Physics 2009-11-13 D. Denisov , A. Buzdin , H. Shimahara

Iron-base superconductors exhibits features of systems where the Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) phase, a superconducting state with non-zero total momentum of Cooper pairs, is actively sought. Experimental and theoretical evidence…

Superconductivity · Physics 2014-10-21 Dawid Crivelli , Andrzej Ptok

There are strong experimental evidences of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state formation in layered organic superconductors in parallel magnetic field. We study theoretically the interplay between the orbital effect and the…

Superconductivity · Physics 2015-06-04 M. D. Croitoru , M. Houzet , A. I. Buzdin

The specific heat of the layered organic superconductor $\kappa$-% (BEDT-TTF)$_2$Cu(NCS)$_2$, where BEDT-TTF is bisethylenedithio-% tetrathiafulvalene, has been studied in magnetic fields up to 28 T applied perpendicular and parallel to the…

Superconductivity · Physics 2007-10-30 R. Lortz , Y. Wang , A. Demuer , P. H. M. Böttger , B. Bergk , G. Zwicknagl , Y. Nakazawa , J. Wosnitza

We present the detailed theoretical study of a heterostructure comprising of two coupled ferromagnetic superconducting layers. Our model may be also applicable to the layered superconductors with alternating interlayer coupling in a…

Superconductivity · Physics 2007-05-23 S. Tollis , J. Cayssol , A. Buzdin

We theoretically predict the in-plane magnetic field-induced orbital Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting states in twisted WSe$_2$ homobilayers (tWSe$_2$), focusing on its dependence on layer polarization and Fermi…

Superconductivity · Physics 2025-08-01 Jihang Zhu , Yang-Zhi Chou , Yi Huang , Sankar Das Sarma

The heavy-fermion superconductor CeCoIn5 is the first material, where different experimental probes show strong evidence pointing to the realization of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. The inhomogeneous superconducting…

Strongly Correlated Electrons · Physics 2009-11-13 M. Nicklas , C. F. Miclea , J. L. Sarrao , J. D. Thompson , G. Sparn , F. Steglich

We systematically investigate the emergence of finite-momentum Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductivity in a square lattice Hubbard model with finite filling, driven by either $d_{xy}$-wave or $d_{x^{2}-y^{2}}$-wave…

Superconductivity · Physics 2026-01-13 Xia-Ji Liu , Hui Hu

We examine the possible phase diagram in an $H$-$T$ plane for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states in a two-band Pauli-limiting superconductor. We here demonstrate that, as a result of the competition of two different modulation…

Superconductivity · Physics 2014-01-21 Takeshi Mizushima , Masahiro Takahashi , Kazushige Machida

Quasi-two dimensional superconductors with sufficiently weak interlayer coupling allow magnetic flux to penetrate in the form of Josephson vortices for in-plane applied magnetic fields. A consequence is the dominance of the Zeeman…

Strongly Correlated Electrons · Physics 2016-02-17 G. Koutroulakis , H. Kühne , J. A. Schlueter , J. Wosnitza , S. E. Brown

We demonstrate that the vortex state in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase may be very different depending on the field orientation relative to the crystalline axes. We calculate numerically the upper critical field near the…

Superconductivity · Physics 2015-06-11 V. H. Dao , D. Denisov , A. Buzdin , J. P. Brison

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state can be found in layered d-wave superconductors such as high $T_c$ cuprates and $\kappa$-(ET)$_2$ salts in a planar magnetic field. We show the superconducting order parameter forms two…

Superconductivity · Physics 2007-05-23 H. Won , K. Maki

The theoretical and experimental results concerning the thermodynamical and low-frequency transport properties of hybrid structures, consisting of spatially-separated conventional low-temperature superconductor (S) and ferromagnet (F), is…

Superconductivity · Physics 2010-05-11 A. Yu. Aladyshkin , A. V. Silhanek , W. Gillijns , V. V. Moshchalkov

We report ^{115}In nuclear magnetic resonance (NMR) measurements in the heavy-fermion superconductor CeCoIn_5 as a function of temperature in different magnetic fields applied parallel to the $(\hat a, \hat b)$ plane. The measurements probe…

Strongly Correlated Electrons · Physics 2009-11-13 V. F. Mitrović , G. Koutroulakis , M. -A. Vachon , M. Horvatić , C. Berthier , G. Lapertot , J. Flouquet

We find the angular Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states (or the twisted kink crystals) in which a phase and an amplitude of a pair potential modulate simultaneously in a quasi-onedimensional superconducting ring with a static…

We have investigated the magnetic phase diagram near the upper critical field of KFe2As2 by magnetic torque and specific heat experiments, using a high-resolution piezo-rotary positioner to precisely control the parallel orientation of the…

Superconductivity · Physics 2017-11-29 Chang-woo Cho , Jonathan Haiwei Yang , Junying Shen , Thomas Wolf , Rolf Lortz

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in quasi-one-dimensional systems with warped Fermi surfaces is examined in strong parallel magnetic fields. It is shown that the state is extremely stable for field directions around…

Superconductivity · Physics 2018-07-10 Katsumi Itahashi , Hiroshi Shimahara

We propose an exactly solvable model to describe the properties of atomic thickness hybrid ferromagnet-superconductor-ferromagnet (F/S/F) structures. We show that the superconducting critical temperature is always higher for antiparallel…

Superconductivity · Physics 2007-05-23 A. Buzdin , M. Daumens

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…

Superconductivity · Physics 2015-03-13 Robert Beaird , Anton B. Vorontsov , Ilya Vekhter

A Fulde-Ferrell-Larkin-Ovchinnkov (FFLO) state was previously reported in the quasi-2D heavy fermion CeCoIn5 when a magnetic field was applied parallel to the ab-plane. Here, we conduct 115^In NMR studies of this material in a PERPENDICULAR…

Superconductivity · Physics 2009-11-11 K. Kumagai , M. Saitoh , T. Oyaizu , Y. Furukawa , S. Takashima , M. Nohara , H. Takagi , Y. Matsuda