Optimizing tip-surface interactions in ESR-STM experiments
arXiv:2212.13471 · doi:10.1103/PhysRevB.107.155406
Abstract
Electron-spin resonance carried out with scanning tunneling microscopes (ESR-STM) is a recently developed experimental technique that is attracting enormous interest on account of its potential to carry out single-spin on-surface resonance with subatomic resolution. Here we carry out a theoretical study of the role of tip-adatom interactions and provide guidelines for choosing the experimental parameters in order to optimize spin resonance measurements. We consider the case of the Fe adatom on a MgO surface and its interaction with the spin-polarized STM tip. We address three problems: first, how to optimize the tip-sample distance to cancel the effective magnetic field created by the tip on the surface spin, in order to carry out proper magnetic field sensing. Second, how to reduce the voltage dependence of the surface-spin resonant frequency, in order to minimize tip-induced decoherence due to voltage noise. Third, we propose an experimental protocol to infer the detuning angle between the applied field and the tip magnetization, which plays a crucial role in the modeling of the experimental results.
arXiv comment10 pages, 5 Figures
References in corpus (28)
- Maximally localized Wannier functions: Theory and applications
- Reading and Writing Single-Atom Magnets
- Engineering the eigenstates of coupled spin-1/2 atoms on a surface
- Enhanced quantum coherence in exchange coupled spins via singlet-triplet transitions
- Tuning the exchange bias on a single atom from 1 mT to 10 T
- Magnetic Resonance Imaging of Single Atoms
- Spin decoherence of magnetic atoms on surfaces
- Tuning Single-Atom Electron Spin Resonance in a Vector-Magnetic Field
- Exchange mechanism for electron paramagnetic resonance of individual adatoms
- Longitudinal and transverse electron paramagnetic resonance in a scanning tunneling microscope
- Quantifying the interplay between fine structure and geometry of an individual molecule on a surface
- Single-atom electron paramagnetic resonance in a scanning tunneling microscope driven by a radiofrequency antenna at 4 K
- Electron paramagnetic resonance of alkali metal atoms and dimers on ultrathin MgO
- Relativistic dynamical spin excitations of magnetic adatoms
- A cotunneling mechanism for all-electrical Electron Spin Resonance of single adsorbed atoms
- Spin Resonance Amplitude and Frequency of a Single Atom on a Surface in a Vector Magnetic Field
- Upgrade of a low-temperature scanning tunneling microscope for electron-spin resonance
- The emergence of classical behavior in magnetic adatoms
- Consequences of Kondo exchange on quantum spins
- Development of a Scanning Tunneling Microscope for Variable Temperature Electron Spin Resonance
- Single spin resonance driven by electric modulation of the g factor anisotropy
- A theoretical review on the single-impurity electron spin resonance on surfaces
- Spin transfer torque induced paramagnetic resonance
- Electron Paramagnetic Resonance of Single Magnetic Moment on a Surface
- Electronic properties of transition metal atoms on CuN/Cu(100)
- Derivation of the spin Hamiltonians for Fe in MgO
- Experimental Determination of a Single Atom Ground State Orbital through Hyperfine Anisotropy
- A model for the ESR-STM phenomenon