Microscopic theory of tunneling spectroscopy in Sr$_2$RuO$_4$

Keiji Yada; Alexander A. Golubov; Yukio Tanaka; Satoshi Kashiwaya

doi:10.7566/JPSJ.83.074706

paper

Microscopic theory of tunneling spectroscopy in Sr $_{2}$ RuO $_{4}$

arXiv:1311.4682 · doi:10.7566/JPSJ.83.074706

Abstract

We study the surface Andreev bound state (ABS) of superconducting Sr $_{2}$ RuO $_{4}$ , which is a candidate material for the realization of the chiral $p$ -wave superconducting state. In order to clarify the role of chiral edge modes as ABSs, the surface density of states and the tunneling conductance is calculated in the normal metal/Sr $_{2}$ RuO $_{4}$ junction within the framework of recursive Green's function method, while taking into account the orbital degrees of freedom (including Spin-Orbit interactions) with realistic material parameters. In Sr $_{2}$ RuO $_{4}$ , there are two bands $α$ and $β$ originating from quasi-one-dimensional orbitals $d_{y z}$ and $d_{z x}$ and a two-dimensional band $γ$ originating from $d_{x y}$ orbital. We discuss about the contributions of various electronic bands to LDOS and the influence of atomic spin-orbit interaction (SOI). In the light of our calculations, quasi-one-dimensional model with dominant pair potentials in $α$ and $β$ bands is consistent with conductance measurements in Au/Sr $_{2}$ RuO $_{4}$ junctions.

to be published in J. Phys. Soc. Jpn., 10 pages, 12 figures

Microscopic theory of tunneling spectroscopy in Sr $_{2}$ RuO $_{4}$

Abstract

References in corpus (9)

Cited by in corpus (27)

Microscopic theory of tunneling spectroscopy in Sr2​RuO4​

Abstract

References in corpus (9)

Cited by in corpus (27)

Microscopic theory of tunneling spectroscopy in Sr $_{2}$ RuO $_{4}$