2016 CAP Congress / Congrès de l'ACP 2016

Magnetic Dipole-Dipole Sensing at the Atomic Scale

13 Jun 2016, 16:15

15m

SITE G0103 (University of Ottawa)

Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M3-4 Materials Characterization: Microscopy and Imaging (DCMMP) / Caractérisation des matériaux: microscopie et imagerie (DPMCM)

Speaker

Mr Andrew Macdonald (University of British Columbia)

Description

High-resolution magnetometry is an essential tool used across the sciences. The recent development of electron spin resonance scanning tunnelling microscopy (ESR-STM) opens the door on a new type of magnetometry, one with the ability to coherently manipulate quantum spins with neV energy resolution and sub-nanometre spatial resolution [1]. In this talk I will show recent results obtained from ESR-STM experiments of Fe and Co atoms deposited on an MgO thin film. By characterizing the magnetic dipole-dipole interaction between atoms we are able to determine their magnetic moment to within 40 neV [2]. Combining this energy resolution with the STM's ability to manipulate atoms we then create and characterize the properties of magnetic nanostructures. Lastly, I will discuss the development of a pulsed ESR-STM scheme and it's relevance for future experiments in quantum computing and quantum simulation. [1] S. Baumann, W. Paul, T. Choi, C.P. Lutz, A. Ardavan, and A.J. Heinrich, Science 350, 417 (2015) [2] T. Choi et al., in preparation