Microscopic Theory of Tunneling Spectroscopy in Sr2RuO4

Keiji Yada, Alexandre Avraamovitch Golubov, Yukio Tanaka, Satoshi Kashiwaya

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

We study the surface Andreev bound state (ABS) of superconducting Sr2RuO4, 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/Sr2RuO4 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 Sr2RuO4, there are two bands α and β originating from quasi-one-dimensional orbitals dyz and dzx and a two-dimensional band γ originating from dxy 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/Sr2RuO4 junctions.
Original languageUndefined
Pages (from-to)074706-
Number of pages8
JournalJournal of the Physical Society of Japan
Volume83
DOIs
Publication statusPublished - 2014

Keywords

  • IR-93516
  • METIS-307817

Cite this

Yada, Keiji ; Golubov, Alexandre Avraamovitch ; Tanaka, Yukio ; Kashiwaya, Satoshi. / Microscopic Theory of Tunneling Spectroscopy in Sr2RuO4. In: Journal of the Physical Society of Japan. 2014 ; Vol. 83. pp. 074706-.
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abstract = "We study the surface Andreev bound state (ABS) of superconducting Sr2RuO4, 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/Sr2RuO4 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 Sr2RuO4, there are two bands α and β originating from quasi-one-dimensional orbitals dyz and dzx and a two-dimensional band γ originating from dxy 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/Sr2RuO4 junctions.",
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Microscopic Theory of Tunneling Spectroscopy in Sr2RuO4. / Yada, Keiji; Golubov, Alexandre Avraamovitch; Tanaka, Yukio; Kashiwaya, Satoshi.

In: Journal of the Physical Society of Japan, Vol. 83, 2014, p. 074706-.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Microscopic Theory of Tunneling Spectroscopy in Sr2RuO4

AU - Yada, Keiji

AU - Golubov, Alexandre Avraamovitch

AU - Tanaka, Yukio

AU - Kashiwaya, Satoshi

PY - 2014

Y1 - 2014

N2 - We study the surface Andreev bound state (ABS) of superconducting Sr2RuO4, 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/Sr2RuO4 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 Sr2RuO4, there are two bands α and β originating from quasi-one-dimensional orbitals dyz and dzx and a two-dimensional band γ originating from dxy 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/Sr2RuO4 junctions.

AB - We study the surface Andreev bound state (ABS) of superconducting Sr2RuO4, 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/Sr2RuO4 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 Sr2RuO4, there are two bands α and β originating from quasi-one-dimensional orbitals dyz and dzx and a two-dimensional band γ originating from dxy 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/Sr2RuO4 junctions.

KW - IR-93516

KW - METIS-307817

U2 - 10.7566/JPSJ.83.074706

DO - 10.7566/JPSJ.83.074706

M3 - Article

VL - 83

SP - 074706-

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

SN - 0031-9015

ER -