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- W1620079765 abstract "Motivated by a recent experiment of Song emph{et al.} [Science {bf 332}, 1410 (2011)], we theoretically study the spin dynamics, charge dynamics, and point-contact Andreev-reflection spectroscopy (PCARS) of two-band iron-based superconductors of a possible extended $s_pm$-wave pairing symmetry. We consider the case of a dominant $s_pm$ gap blended by a secondary extended $s$ component in which gap nodes can develop in the Fermi pockets near zone corner and/or boundary. Due to the strong nesting effect associated with nodal regions, dynamical spin and charge susceptibilities can exhibit strong peaks at momenta near $(pmpi/2,0)$, $(pmpi,pmpi/2)$, as well as $(pmpi,0)$ in the unfolded Brillouin zone. For PCARS, considering an anisotropic band effect induced by an applied voltage, [100] differential conductance can exhibit a $V$-shape behavior manifesting a gap node occurring in such direction. It is highly suggested that the above features can be experimentally investigated to help sorting out the pairing symmetry of iron-based superconductors." @default.
- W1620079765 created "2016-06-24" @default.
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- W1620079765 date "2012-07-01" @default.
- W1620079765 modified "2023-10-14" @default.
- W1620079765 title "Consequences of extended $s_pm$-wave pairing in iron-based superconductors" @default.
- W1620079765 doi "https://doi.org/10.48550/arxiv.1207.0270" @default.
- W1620079765 hasPublicationYear "2012" @default.
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