Agterberg, Zheng, and Mukherjee Reply:

Agterberg, D. F.; Zheng, Zhen; Mukherjee, Soumya

doi:10.1103/physrevlett.102.069704

Cited by 34 publications

(63 citation statements)

References 5 publications

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“…On the basis of a previous argument [19] given in relation to phenomena in CeCoIn 5 , these two features satisfy the condition for the emergence of a crisscrossing vortex lattice [20] as the PPB-induced modulated high-field SC state, where, in contrast to a FFLO state, the order parameter has only spatial line nodes. In addition, stable halfflux quanta can emerge in this state.…”

Section: Introductionsupporting

confidence: 59%

Possible Field–Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking

Adachi

Ikeda

2015

J. Phys. Soc. Jpn.

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Possible field-temperature superconducting (SC) phase diagrams in two-band quasi-twodimensional materials with a strong paramagnetic pair-breaking (PPB) are considered theoretically. Attention is paid to the case under a magnetic field perpendicular to the SC layers and to essential differences from the counterpart in the ordinary single-band material. It is found by examining the H c2 (T ) curve and the vortex lattices to be realized close to H c2 that a PPB-induced SC phase with a spatial modulation parallel to the field tends to occur more easily than in the single-band case, and that a crisscrossing vortex lattice proposed previously can occur in place of the conventional Fulde-Ferrell-Larkin-Ovchinnikov state within a parameter range. The relevance of the obtained results to FeSe and other iron-based superconductors is discussed.

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Section: Introductionsupporting

confidence: 59%

Possible Field–Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking

Adachi

Ikeda

2015

J. Phys. Soc. Jpn.

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“…Such pairing states are now collectively known as the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. This novel inhomogeneous superconducting state has attracted broad theoretical interest [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] due to the experiments suggestive of its existence in various superconductors such as heavy-fermion, [19][20][21] organic and other superconductors, 22,23 and its possible realization in cold atom systems, 24,25 high-density quark matter, and nuclear matter. 26 Though it is long believed that the FFLO state can only exist in unconventional superconductors, experimental indication of disordered FFLO phase was reported in a conventional superconductor recently.…”

mentioning

confidence: 99%

Spectroscopic signatures of the Larkin-Ovchinnikov state in the conductance characteristics of a normal-metal/superconductor junction

Cui

Wei

et al. 2012

Phys. Rev. B

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Using a discrete-lattice approach, we calculate the conductance spectra between a normal-metal and an s-wave Larkin-Ovchinnikov (LO) superconductor, with the junction interface oriented along the direction of the order parameter (OP) modulation. The OP sign reversal across one single nodal line can induce a sizable number of zero-energy Andreev bound states around the nodal line, and a hybridized midgap-states band is formed amid a momentum-dependent gap as a result of the periodic array of nodal lines in the LO state. This band-in-gap structure and its anisotropic properties give rise to distinctive features in both the point-contact and tunneling spectra as compared with the BCS and Fulde-Ferrell cases. These spectroscopic features can serve as distinguishing signatures of the LO state.

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“…Motivated by the recent revival of spatially modulated superconducting (SC) states induced by paramagnetic pair breaking (PPB) [1][2][3][4], noncentrosymmetric superconductors [5] in nonzero magnetic fields have been studied in recent years as a novel type of system with a peculiar modulated SC state. In noncentrosymmetric superconductors, the lack of spatial inversion symmetry results in a splitting of the original Fermi surface into two sheets and makes effects of PPB anisotropic.…”

Section: Introductionmentioning

confidence: 99%

Quasiclassical analysis of vortex lattice states in Rashba noncentrosymmetric superconductors

Dan

Ikeda

2015

Phys. Rev. B

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Vortex lattice states occurring in noncentrosymmetric superconductors with a spin-orbit coupling of Rashba type under a magnetic field parallel to the symmetry plane are examined by assuming the s-wave pairing case and in an approach combining the quasiclassical theory with the Landau level expansion of the superconducting order parameter. The resulting field-temperature phase diagrams include not only a discontinuous transition but a continuous crossover between different vortex lattice structures, and, further, a critical end point of a structural transition line is found at an intermediate field and a low temperature in the present approach. It is pointed out that the strange field dependence of the vortex lattice structure is a consequence of that of its anisotropy stemming from the Rashba spin-orbit coupling, and that the critical end point is related to the helical phase modulation peculiar to these materials in the ideal Pauli-limited case. Furthermore, calculation results on the local density of states detectable in STM experiments are also presented.

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Agterberg, Zheng, and Mukherjee Reply:

Cited by 34 publications

References 5 publications

Possible Field–Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking

Possible Field–Temperature Phase Diagrams of Two-Band Superconductors with Paramagnetic Pair-Breaking

Spectroscopic signatures of the Larkin-Ovchinnikov state in the conductance characteristics of a normal-metal/superconductor junction

Quasiclassical analysis of vortex lattice states in Rashba noncentrosymmetric superconductors

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