TY - JOUR
T1 - Double-Resonance Spectroscopy of Coupled Electron Spins on a Surface
AU - Phark, Soo Hyon
AU - Chen, Yi
AU - Bui, Hong T.
AU - Wang, Yu
AU - Haze, Masahiro
AU - Kim, Jinkyung
AU - Bae, Yujeong
AU - Heinrich, Andreas J.
AU - Wolf, Christoph
N1 - Funding Information:
This work was supported by the Institute for Basic Science (IBS-R027-D1). Y.C. acknowledges support from the National Science Foundation of China (Grant No. 12250001). M.H. acknowledges financial support from University of Tokyo Global Activity Support Program for Young Researchers (FY2020).
Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023
Y1 - 2023
N2 - Scanning-tunneling microscopy (STM) combined with electron spin resonance (ESR) has enabled single-spin spectroscopy with nanoelectronvolt energy resolution and angstrom-scale spatial resolution, which allows quantum sensing and magnetic resonance imaging at the atomic scale. Extending this spectroscopic tool to a study of multiple spins, however, is nontrivial due to the extreme locality of the STM tunnel junction. Here we demonstrate double electron-electron spin resonance spectroscopy in an STM for two coupled atomic spins by simultaneously and independently driving them using two continuous-wave radio frequency voltages. We show the ability to drive and detect the resonance of a spin that is remote from the tunnel junction while read-out is achieved via the spin in the tunnel junction. Open quantum system simulations for two coupled spins reproduce all double-resonance spectra and further reveal a relaxation time of the remote spin that is longer by an order of magnitude than that of the local spin in the tunnel junction. Our technique can be applied to quantum-coherent multi-spin sensing, simulation, and manipulation in engineered spin structures on surfaces.
AB - Scanning-tunneling microscopy (STM) combined with electron spin resonance (ESR) has enabled single-spin spectroscopy with nanoelectronvolt energy resolution and angstrom-scale spatial resolution, which allows quantum sensing and magnetic resonance imaging at the atomic scale. Extending this spectroscopic tool to a study of multiple spins, however, is nontrivial due to the extreme locality of the STM tunnel junction. Here we demonstrate double electron-electron spin resonance spectroscopy in an STM for two coupled atomic spins by simultaneously and independently driving them using two continuous-wave radio frequency voltages. We show the ability to drive and detect the resonance of a spin that is remote from the tunnel junction while read-out is achieved via the spin in the tunnel junction. Open quantum system simulations for two coupled spins reproduce all double-resonance spectra and further reveal a relaxation time of the remote spin that is longer by an order of magnitude than that of the local spin in the tunnel junction. Our technique can be applied to quantum-coherent multi-spin sensing, simulation, and manipulation in engineered spin structures on surfaces.
KW - double electron−electron spin resonance
KW - electron-spin resonance
KW - open quantum systems
KW - quantum state control
KW - scanning−tunneling microscopy
UR - http://www.scopus.com/inward/record.url?scp=85164923411&partnerID=8YFLogxK
U2 - 10.1021/acsnano.3c04754
DO - 10.1021/acsnano.3c04754
M3 - Article
C2 - 37406167
AN - SCOPUS:85164923411
SN - 1936-0851
JO - ACS Nano
JF - ACS Nano
ER -