Texture in the Superconducting Order Parameter of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">o</mml:mi><mml:mi mathvariant="normal">I</mml:mi><mml:mi mathvariant="normal">n</mml:mi></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:math>Revealed by Nuclear Magnetic Resonance

Kakuyanagi, Kosuke; Saitoh, Masaaki; Kumagai, K.; Takashima, S.; Nohara, M.; Takagi, H.; Matsuda, Yuji

doi:10.1103/physrevlett.94.047602

Cited by 177 publications

(119 citation statements)

References 30 publications

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“…[7][8][9] In magnetic fields, the spin degrees of freedom are significantly coupled with the stability of the SC order; a strong Pauli paramagnetic effect gives rise to a first-order transition at the SC upper critical field H c2 below 0.7 K, 7,[10][11][12] and the SC phase coexistent with AFM spin modulation evolves just below H c2 at very low temperatures. [13][14][15][16][17][18] Furthermore, the existence of the AFM-QCP at ∼ H c2 is strongly suggested from the observations of the NFL behavior in the paramagnetic phase above H c2 , including the − ln T divergence in specific heat divided by temperature, the T -linear dependence in magnetization, and electrical resistivity. 10,19,20) In fact, the long-range AFM orders are generated by substituting the ions for the elements in CeCoIn 5 , such as Nd for Ce, 21,22) Rh for Co, [23][24][25][26] and Cd, Hg, and Zn for In.…”

Section: Introductionmentioning

confidence: 99%

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

et al. 2016

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The effect of off-plane impurity on superconductivity and non-Fermi-liquid (NFL) behavior in the layered heavyfermion compound CeCo 1−x Ni x In 5 is investigated by specific heat, magnetization, and electrical resistivity measurements. These measurements reveal that the superconducting (SC) transition temperature T c monotonically decreases from 2.3 K (x = 0) to 0.8 K (x = 0.20) with increasing x, and then the SC order disappears above x = 0.25. At the same time, the Ni substitution yields the NFL behavior at zero field for x = 0.25, characterized by the − ln T divergence in specific heat divided by temperature, C p /T , and magnetic susceptibility, M/B. The NFL behavior in magnetic fields for x = 0.25 is quite similar to that seen at around the SC upper critical field in pure CeCoIn 5 , suggesting that both compounds are governed by the same antiferromagnetic quantum criticality. The resemblance of the doping effect on the SC order among Ni-, Sn-, and Pt-substituted CeCoIn 5 supports the argument that the doped carriers are primarily responsible for the breakdown of the SC order. The present investigation further reveals the quantitative differences in the trends of the suppression of superconductivity between Ce(Co,Ni)In 5 and the other alloys, such as the rates of decrease in T c , dT c /dx, and specific heat jump at T c , d(∆C p /T c )/dx. We suggest that the occupied positions of the doped ions play an important role in the origin of these differences.

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Section: Introductionmentioning

confidence: 99%

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

et al. 2016

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“…Nowadays such states are collectively known as the Fulde-FerrellLarkin-Ovchinnikov (FFLO) state. Recently the FFLO state has received renewed interest due to experimental evidence of its existence in various superconductors, 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27 and the (thus far theoretical) possibility of its realization in trapped cold atom systems, 28,29 nuclear matter and in the core of neutron stars. 30 Soon after the original work of FFLO, it was found that the FFLO state is very sensitive to the presence of impurities, and eventually suppressed when the disorder strength reaches certain critical value.…”

Section: Introductionmentioning

confidence: 99%

Fulde-Ferrell-Larkin-Ovchinnikov state in disordereds-wave superconductors

Cui

Yang

2008

Phys. Rev. B

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The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is a superconducting state stabilized by a large Zeeman splitting between up-and down-spin electrons in a singlet superconductor. In the absence of disorder, the superconducting order parameter has a periodic spatial structure, with periodicity determined by the Zeeman splitting. Using the Bogoliubov-de Gennes (BdG) approach, we investigate the spatial profiles of the order parameters of FFLO states in a two-dimensional s-wave superconductors with nonmagnetic impurities. The FFLO state is found to survive under moderate disorder strength, and the order parameter structure remains approximately periodic. The actual structure of the order parameter depends on not only the Zeeman field, but also the disorder strength and in particular the specific disorder configuration.

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“…It follows from the fact that they possess properties close to heavy fermions systems [16], for which strong experimental evidence suggest the existence of said phase [17][18][19][20][21][22]. Both kinds of systems are multilayered, clean and have a relatively high Maki parameter.…”

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confidence: 99%

The Fulde–Ferrell–Larkin–Ovchinnikov State in Pnictides

Ptok

Crivelli

2013

J Low Temp Phys

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Fe-based superconductors (FeSC) exhibit all the properties of systems that allow the formation of a superconducting phase with oscillating order parameter, called the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. By the analysis of the Cooper pair susceptibility in two-band FeSC, such systems are shown to support the existence of a FFLO phase, regardless of the exhibited order parameter symmetry. We also show the state with nonzero Cooper pair momentum, in superconducting FeSC with ∼ cos(k x ) · cos(k y ) symmetry, to be the ground state of the system in a certain parameter range.

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Texture in the Superconducting Order Parameter ofCeCoIn5Revealed by Nuclear Magnetic Resonance

Cited by 177 publications

References 30 publications

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Fulde-Ferrell-Larkin-Ovchinnikov state in disordereds-wave superconductors

The Fulde–Ferrell–Larkin–Ovchinnikov State in Pnictides

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Texture in the Superconducting Order Parameter ofCeCoIn5Revealed by Nuclear Magnetic Resonance

Cited by 177 publications

References 30 publications

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo1−xNixIn5

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo1−xNixIn5

Fulde-Ferrell-Larkin-Ovchinnikov state in disordereds-wave superconductors

The Fulde–Ferrell–Larkin–Ovchinnikov State in Pnictides

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Resources

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Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅

Superconductivity and Non-Fermi-Liquid Behavior in the Heavy-Fermion Compound CeCo₁₋_xNi_xIn₅