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Article overview
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Possible three-dimensional nematic odd-parity superconductivity in Sr$_2$RuO$_4$ | | Wen Huang
; Hong Yao
; | | Date: |
1 Mar 2018 | | Abstract: | The superconducting pairing in Sr$_2$RuO$_4$ is widely considered to be
chiral p-wave with $vec{d}_{oldsymbol k} sim (k_x + ik_y)hat{z}$, which
belongs to the $E_u$ representation of the crystalline $D_{4h}$ group. However,
this superconducting order appears hard to reconcile with a number of key
experiments. In this paper, based on symmetry analysis we discuss the
possibility of odd-parity pairing with inherent three-dimensional (3D)
character enforced by the inter-orbital interlayer coupling and the sizable
spin-orbit coupling (SOC) in the material. We focus on a yet unexplored $E_u$
pairing, which contains finite $(k_z hat x$, $k_z hat y)$-component in the
gap function. Under appropriate circumstances a novel time-reversal invariant
nematic pairing can be realized. This superconducting state could make contact
with some puzzling observations on Sr$_2$RuO$_4$, such as the absence of
spontaneous edge current. | | Source: | arXiv, 1803.0371 | | Services: | Forum | Review | PDF | Favorites | |
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