Spin resonance amplitude and frequency of a single atom on a surface in a vector magnetic field
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 주제(기타) Physics, Condensed Matter
- 설명문(일반) [Kim, Jinkyung; Bui, Thi Hong; Wolf, Christoph; Chen, Yi; Krylov, Denis; Lee, Soonhyeong; Yoon, Sangwon; Heinrich, Andreas J.; Bae, Yujeong] Inst for Basic Sci Korea, Ctr Quantum Nanosci, Seoul 03760, South Korea; [Kim, Jinkyung; Bui, Thi Hong; Heinrich, Andreas J.; Bae, Yujeong] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Jang, Won-jun] Samsung Adv Inst Technol, Suwon 13595, South Korea; [Choi, Deung-Jang] Univ Basque Country, CSIC, Ctr Fis Mat MPC, San Sebastian 20018, Spain; [Choi, Deung-Jang] Donostia Int Phys Ctr, San Sebastian 20018, Spain; [Choi, Deung-Jang] Ikerbasque, Basque Fdn Sci, Bilbao 48013, Spain; [Wolf, Christoph; Chen, Yi; Krylov, Denis; Lee, Soonhyeong; Yoon, Sangwon] Ewha Womans Univ, Seoul 03760, South Korea; [Delgado, Fernando] Univ La Laguna, Inst Estudios Avanzados IUDEA, Dept Fis, Tenerife 38203, Spain; [Lutz, Christopher P.] IBM Almaden Res Ctr, San Jose, CA 95120 USA
- 등재 SCIE, SCOPUS
- OA유형 Green Published, Green Submitted
- 발행기관 AMER PHYSICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000190255
- 본문언어 영어
- Published As https://doi.org/10.1103/PhysRevB.104.174408
초록/요약
We investigated spin-1/2 hydrogenated titanium (Ti) atoms on MgO using scanning tunneling microscopy (STM) combined with electron spin resonance (ESR) in vector magnetic fields. Rotating external magnetic fields, we observed rather drastic changes in both amplitude and frequency of resonance signals for single Ti atoms. While the variation of ESR amplitudes reflects the effects of the spin polarization of a magnetic tip and local magnetic fields created by the interaction between the tip and Ti, the change of resonance frequencies shows the anisotropy of g values for Ti atoms. Using the Ti atoms at the low-symmetry bridge adsorption site of the MgO lattice allowed for identifying the g values in all three spatial directions. Multiplet calculations confirmed the origin of this anisotropy as the spin-orbit coupling induced effects of crystal. Our results show the capability of single atomic spins as a sensor to probe magnetic surroundings and highlight the precision of ESR-STM to identify the single atom's spin states in a solid-state environment.
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