Inelastic Tunneling Spectroscopy in a D-wave Superconductor

Abstract

We propose a mechanism to use inelastic tunneling spectrosopy STM to detect a single spin in a d-wave superconductor and in a pseudogap state, 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 a dI/dV characteristic at Zeeman energy of the spin ω_0. We find that for relevant values of parameters signal scales as dI^2/dV^2 \simeq (JN_0)^2 Θ(eV - ω_0) and could be in the range of 10^{-2} of the bare density of states where N_0 is the density of states for surface electrons. Scattering in superconductor with the coherence peak at gap maximum Δleads also to strong features at Δ+ ω_0. This suggests a new technique for a detection of a local spin excitation with STM. We also consider a detection of a local vibrational mode as a simple extension of the spin case.

5 pages latex file, 3 figures eps file, minor text xhanges and new figure added

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Cited by in corpus (15)

• Interplay of electron-lattice interactions and superconductivity in Bi2Sr2CaCu2O8+d
• Phonon mediated tunneling into graphene
• Theory of Local Dynamical Magnetic Susceptibilities from the Korringa-Kohn-Rostoker Green Function Method
• Role of Inelastic Tunneling through the Barrier in Scanning Tunneling Microscope Experiments on Cuprates
• Inelastic Electron Tunneling Spectroscopy for Topological Insulators
• Fourier-Transformed Local Density of States and Tunneling into a $D$-Wave Superconductor with Bosonic Modes
• Effects of ${\tau }_1$ Scattering on Fourier-Transformed Inelastic Tunneling Spectra in High-$T_c$ Cuprates with Bosonic Modes
• Effects of a Collective Spin Resonance Mode on the STM Spectra of D-Wave Superconductors
• Excitation of a bosonic mode by electron tunneling into a cuprate superconductor
• Theory of spin inelastic tunneling spectroscopy for superconductor-superconductor and superconductor-metal junctions
• Theoretical probing of inelastic spin-excitations in adatoms on surfaces
• Inelastic electron tunneling spectroscopy at local defects in graphene
• Imaging spin-inelastic Friedel oscillations emerging from magnetic impurities
• Inelastic-impurity-scattering-induced spin texture and topological transitions in surface electron waves
• Spin Inelastic Electron Tunneling Spectroscopy on Local Magnetic Moment Embedded in Josephson Junction