Inelastic tunneling spectroscopy in a d-wave superconductor

A. V. Balatsky; Ar Abanov; Jian Xin Zhu

doi:10.1016/j.physc.2004.02.134

Inelastic tunneling spectroscopy in a d-wave superconductor

A. V. Balatsky
, Ar Abanov
, Jian Xin Zhu

Los Alamos National Laboratory

Research output: Contribution to journal › Conference article

Abstract

We propose a mechanism to use inelastic tunneling spectroscopy STM to detect a single spin in a d-wave superconductor, based on a direct exchange coupling J between the surface electrons and the local spin S in a magnetic field. This coupling will produce a kink in dI/dV characteristics at Zeeman energy of the spin ω₀. We find that for relevant values of parameters the signal scales as dI²/dV²≃(JN ₀)²Θ(eV-ω₀) and could be in the range of 10^-2 of the bare density of states where N₀ is the density of states for surface electrons. Scattering in superconductor with the coherence peak at gap maximum Δ leads also to strong features at Δ+ω₀. This suggests a new technique for a detection of a local spin excitation with STM.

Original language	English
Pages (from-to)	246-247
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	408-410
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physc.2004.02.134
State	Published - Aug 1 2004
Event	Proceedings of the International Conference on Materials - Duration: Aug 1 2004 → …

Access to Document

10.1016/j.physc.2004.02.134

Cite this

@article{0f45a267eac947a19a761aae49ede8be,

title = "Inelastic tunneling spectroscopy in a d-wave superconductor",

abstract = "We propose a mechanism to use inelastic tunneling spectroscopy STM to detect a single spin in a d-wave superconductor, based on a direct exchange coupling J between the surface electrons and the local spin S in a magnetic field. This coupling will produce a kink in dI/dV characteristics at Zeeman energy of the spin ω0. We find that for relevant values of parameters the signal scales as dI2/dV2≃(JN 0)2Θ(eV-ω0) and could be in the range of 10-2 of the bare density of states where N0 is the density of states for surface electrons. Scattering in superconductor with the coherence peak at gap maximum Δ leads also to strong features at Δ+ω0. This suggests a new technique for a detection of a local spin excitation with STM.",

author = "Balatsky, \{A. V.\} and Ar Abanov and Zhu, \{Jian Xin\}",

year = "2004",

month = aug,

day = "1",

doi = "10.1016/j.physc.2004.02.134",

language = "English",

volume = "408-410",

pages = "246--247",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "1-4",

note = "Proceedings of the International Conference on Materials ; Conference date: 01-08-2004",

}

TY - JOUR

T1 - Inelastic tunneling spectroscopy in a d-wave superconductor

AU - Balatsky, A. V.

AU - Abanov, Ar

AU - Zhu, Jian Xin

PY - 2004/8/1

Y1 - 2004/8/1

N2 - We propose a mechanism to use inelastic tunneling spectroscopy STM to detect a single spin in a d-wave superconductor, based on a direct exchange coupling J between the surface electrons and the local spin S in a magnetic field. This coupling will produce a kink in dI/dV characteristics at Zeeman energy of the spin ω0. We find that for relevant values of parameters the signal scales as dI2/dV2≃(JN 0)2Θ(eV-ω0) and could be in the range of 10-2 of the bare density of states where N0 is the density of states for surface electrons. Scattering in superconductor with the coherence peak at gap maximum Δ leads also to strong features at Δ+ω0. This suggests a new technique for a detection of a local spin excitation with STM.

AB - We propose a mechanism to use inelastic tunneling spectroscopy STM to detect a single spin in a d-wave superconductor, based on a direct exchange coupling J between the surface electrons and the local spin S in a magnetic field. This coupling will produce a kink in dI/dV characteristics at Zeeman energy of the spin ω0. We find that for relevant values of parameters the signal scales as dI2/dV2≃(JN 0)2Θ(eV-ω0) and could be in the range of 10-2 of the bare density of states where N0 is the density of states for surface electrons. Scattering in superconductor with the coherence peak at gap maximum Δ leads also to strong features at Δ+ω0. This suggests a new technique for a detection of a local spin excitation with STM.

UR - https://www.scopus.com/pages/publications/4344638932

U2 - 10.1016/j.physc.2004.02.134

DO - 10.1016/j.physc.2004.02.134

M3 - Conference article

SN - 0921-4534

VL - 408-410

SP - 246

EP - 247

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 1-4

T2 - Proceedings of the International Conference on Materials

Y2 - 1 August 2004

ER -

Inelastic tunneling spectroscopy in a d-wave superconductor

Abstract

Access to Document

Fingerprint

Cite this