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In superconducting nanofilms the energy quantization induced by the confinement in the direction perpendicular to the film leads to a multiband character of the system which results in the thickness-dependent oscillations of the in-plane…

Mesoscale and Nanoscale Physics · Physics 2015-02-18 P. Wójcik , M. Zegrodnik

We report specific heat measurements of the heavy fermion superconductor CeCoIn5 in the vicinity of the superconducting critical field H_{c2}, with magnetic field in the [110], [100], and [001] directions, and at temperatures down to 50 mK.…

Strongly Correlated Electrons · Physics 2009-11-10 A. Bianchi , R. Movshovich , C. Capan , A. Lacerda , P. G. Pagliuso , J. L. Sarrao

The conventional Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state relies on the Zeeman effect of an external magnetic field to break time-reversal symmetry, forming a state of finite-momentum Cooper pairing. In superconductors with broken…

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, characterized by Cooper pairs condensed at finite momentum, has been a long-sought state that remains unresolved in many classes of fermionic systems, including superconductors and…

The Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state near the antiferromagnetic quantum critical point (AFQCP) is investigated by analyzing the two dimensional Hubbard model on the basis of the fluctuation exchange (FLEX) approximation. The…

Superconductivity · Physics 2009-11-13 Youichi Yanase

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase is an unconventional superconducting state found under the influence of strong Zeeman field. This phase is identified by finite center-of-mass momenta in the Cooper pairs, causing the…

Superconductivity · Physics 2019-07-24 Anushree Datta , Kun Yang , Amit Ghosal

We show that the behaviour of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconductors near a surface is considerably different from the usual case. The order parameter of the FF state is strongly deformed near the surface, which leads…

Superconductivity · Physics 2019-01-09 K. V. Samokhin , B. P. Truong

We have studied the distinctive features of the Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) instability and phase transitions in two--dimensional (2D) mesoscopic superconductors placed in magnetic field of arbitrary orientation and rotating…

Quantum Gases · Physics 2015-05-19 A. V. Samokhvalov , A. S. Mel'nikov , A. I. Buzdin

Finite-momentum superconductivity has become an important research topic in condensed matter physics. In particular, the orbital Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, which is stabi lized in atomically thin films by the orbital…

Superconductivity · Physics 2025-06-27 Michiya Chazono , Youichi Yanase

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

Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) inhomogeneous superconducting (SC) state, first- and second-order phase transitions, and quantum criticality induced by spin accumulation in a ferromagnet-$d_{x^{2}-y^{2}}$-wave…

Superconductivity · Physics 2009-11-11 Biao Jin , Gang Su , Qing-Rong Zheng

Exotic superconductivity is formed by unconventional electron pairing and exhibits various unique properties that cannot be explained by the basic theory. The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is known as an exotic…

Superconductivity · Physics 2022-10-05 Shusaku Imajo , Toshihiro Nomura , Yoshimitsu Kohama , Koichi Kindo

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, an unusual superconducting state, defies high magnetic fields beyond the Pauli paramagnetic limit. It exhibits a spatial modulation of the superconducting order parameter in real space and…

We review the concepts and the present state of theoretical studies of spin-imbalanced superfluidity, in particular the elusive Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, in the context of ultracold quantum gases. The comprehensive…

Quantum Gases · Physics 2019-04-30 Jami J. Kinnunen , Jildou E. Baarsma , Jani-Petri Martikainen , Päivi Törmä

Magnetization measurements were performed on CeCoIn_5 at temperature down to 30 mK with the magnetic field applied in three different orientations: parallel, near parallel ($\sim$ 10$^{0}$ rotated) and perpendicular to the ab-plane. For…

We discuss some properties of the ferromagnet-superconductor proximity system. In particular, the emphasis is put on the physics of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) like state. In addition to Andreev reflections it features a…

Superconductivity · Physics 2007-05-23 B. L. Gyorffy , M. Krawiec , J. F. Annett

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase, a superconducting state with non-zero total momentum Cooper pairs in a large magnetic field, was first predicted about 50 years ago, and since then became an important concept in many…

Quantum Gases · Physics 2014-02-24 Yong Xu , Chunlei Qu , Ming Gong , Chuanwei Zhang

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

When the inversion symmetry is broken, the spin-orbit coupling reduces the transition temperature of some types of spin triplet superconductivity, which is similar to the case that magnetic field reduces the spin singlet superconductivity…

Superconductivity · Physics 2009-11-11 Hiroko Tanaka , Hirono Kaneyasu , Yasumasa Hasegawa

Upper critical field parallel to the conducting layer is studied in anisotropic type-II superconductors on square lattices. We assume enough separation of the adjacent layers, for which the orbital pair-breaking effect is suppressed for…

Superconductivity · Physics 2009-11-07 Hiroshi Shimahara , Kentaro Moriwake