Proposal for identifying possible even-parity superconducting states in Sr2RuO4 using planar tunneling spectroscopy

Satoshi Ikegaya; Shu-Ichiro Suzuki; Yukio Tanaka; Dirk Manske

doi:10.1103/PhysRevResearch.3.L032062

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Proposal for identifying possible even-parity superconducting states in Sr2RuO4 using planar tunneling spectroscopy

Satoshi Ikegaya, Shu-Ichiro Suzuki, Yukio Tanaka, Dirk Manske

DOI 10.1103/PhysRevResearch.3.L032062 · Physical Review Research

T1

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Abstract

After more than 25 years of research, three even-parity superconducting states—the d+id-wave, d+ig-wave, and s+id-wave states—have emerged as leading candidates for the superconducting states of Sr2RuO4. In the present work, we propose a tunneling spectroscopy experiment for distinguishing among these three superconducting states. The key component of our proposal is that we examine the conductance spectra of normal-metal/Sr2RuO4 junctions with various angles between the junction interface and the crystal axis of the Sr2RuO4. The angle dependence of the conductance spectra shows a unique pattern in each superconducting state, which can function as a fingerprint for verifying the pairing symmetry of Sr2RuO4.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown