Quasiparticle interference testing the possible pairing symmetry in Sr2RuO4

doi:10.1088/1674-1056/ab8888

Abstract The quasiparticle interference (QPI) patterns of the superconducting state in Sr₂RuO₄ are theoretically studied by taking into account the spin-orbital coupling and two different pairing modes, chiral p-wave pairing and equal d-wave pairing, in order to propose an experimental method to test them. Both of the QPI spectra for the two pairing modes have clearly peaks evolving with energy, and their locations can be determined from the tips of the constant energy contour. But the number, location, and evolution of these peaks with energy are different between the two pairing modes. The different behaviors of the QPI patterns in these two pairing modes may help to resolve whether Sr₂RuO₄ is a chiral p-wave or d-wave superconductor.

Keywords: Sr₂RuO₄ quasiparticle interference chiral p-wave d-wave

Received: 27 December 2019
Revised: 19 March 2020
Accepted manuscript online:

PACS:	74.20.-z	(Theories and models of superconducting state)
	74.20.Rp	(Pairing symmetries (other than s-wave))
	74.70.-b	(Superconducting materials other than cuprates)

Fund: Project supported by the National Natural Science Foundataion of China (Grant Nos. 11604168, 11604166, and 11604303). WSW also acknowledges the supports by K. C. Wong Magna Fund in Ningbo University.

Corresponding Authors: Wan-Sheng Wang
E-mail: wangwansheng@nbu.edu.cn

Cite this article:

Cong-Cong Zhang(张聪聪), Jin-Hua Sun(孙金华), Yang Yang(杨阳), Wan-Sheng Wang(王万胜) Quasiparticle interference testing the possible pairing symmetry in Sr₂RuO₄ 2020 Chin. Phys. B 29 067401

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Quasiparticle interference testing the possible pairing symmetry in Sr2RuO4

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Quasiparticle interference testing the possible pairing symmetry in Sr₂RuO₄