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Jisoo Yu,Franklin H. Cho,Luciano Colazzo,Yejin Jeong,Juyoung Park,Junjie Liu,Arzhang Ardavan,Giovanni Boero,Andreas J. Heinrich,Fabio Donati 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.1
Electron spin resonance (ESR) spectroscopy is a powerful tool for establishing the quantum coherence of molecular spin qubits [1]. In order to determine their performance as quantum bits for quantum information processing, it is important to integrate them into solid-state substrates and characterize their interaction with the electrons of the substrate. However, this characterization requires tailored spectrometers with sufficient surface sensitivity. Here, we utilize α, γ-bisdiphenylene-β-phenylallyl (BDPA) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) thin film as samples to characterize a home-built surface-sensitive ESR spectrometer. Both molecules are traditional standards in the ESR technique and have different characteristics on the surfaces [2], [3]. The spectrometer operates in the X band (10 GHz) in both continuous wave and pulsed mode in a wide range of temperature (2.5-300 K) and magnetic field (0-3.2 T). To maximize the microwave field in a 2D spin system, we developed a coplanar-type resonator, on whose surface we deposited the molecular films. We demonstrate a spin sensitivity of 1012 spins / G · √Hz in continuous wave mode at room temperature, allowing ESR measurements down to a single layer of molecular spins.
Erbium on MgO(100)/Ag(100) as candidate for single-atom-qubit
Stefano Reale,Jiyoon Hwang,Jeongmin Oh,Aparajita Singha,Safa L. Ahmed,Denis Krylov,Luciano Colazzo,Christoph Wolf,Carlo S. Casari,Alessandro Barla,Edgard Fernandes,Francois Patthey,Marina Pivetta,Stef 한국자기학회 2023 한국자기학회 학술연구발표회 논문개요집 Vol.33 No.1