Electric-field-driven Spin Resonance by On-surface Exchange Coupling to a Single-atom Magnet

SOO-HYON PHARK; HONG THI BUI; ALEJANDRO FERRÓN; OAQUIN FERNÁNDEZ-ROSSIER; JOSE REINA-GÁLVEZ; CHRISTOPH WOLF; YU WANG; KAI YANG; ANDREAS J. HEINRICH; CHRISTOPHER P. LUTZ

Advanced Science

Wiley

Lugar: Winheim; Año: 2023

Coherent control of individual atomic and molecular spins on surfaceshas recently been demonstrated by using electron spin resonance (ESR)in a scanning tunneling microscope (STM). Here we present a combinedexperimental and modeling study of the ESR of a single hydrogenatedTi atom that is exchange-coupled to a Fe adatom positioned in 0.6-0.8nm away by means of atom manipulation. Continuous wave and pulsed ESRof the Ti spin show a Rabi rate with two contributions, one from thetip and the other from the Fe, whose spin interactions with Ti aremodulated by the radio-frequency electric field. The Fe contributionis comparable to the tip, as revealed from its dominance when the tipis retracted, and tunable using a vector magnetic field. Our new ESRscheme allows on-surface individual spins to be addressed andcoherently controlled without the need for magnetic interaction witha tip. This study establishes a feasible implementation of spin-basedmulti-qubit systems on surfaces.p { line-height: 115%; text-align: left; orphans: 2; widows: 2; margin-bottom: 0.1in; direction: ltr; background: transparent }p.western { font-size: 12pt; so-language: de-DE }p.cjk { font-size: 12pt; so-language: ja-JP }p.ctl { font-size: 12pt }a:link { color: #0000ff; text-decoration: underline }