we report direct experimental evidence of magnetism by using a scanning tunneling microscope. We. demonstrate that the localized state of the atomic defects is split into two DOS peaks with energy separations of several tens of meV.

2020年2月15日 · Via a scanning tunnelling microscopy (STM) tip, we tuned the interactions between them and realized three different magnetic states of the single-carbon vacancies in graphene. Density functional theory (DFT) calculations revealed the nature of these magnetic states and quantum phase transitions between the three coupling regimes.

2020年4月17日 · Using STS and STM-based inelastic electron tunneling spectroscopy (IETS), we then unraveled unambiguous spectroscopic signatures of collective magnetism in 1 and 2 in the form of singlet–triplet spin excitations.

2023年8月11日 · In this review, we focus on the evidence and developments of the emergent ferromagnetism in sp2 carbon revealed by nine kinds of experimental methods: magnetic force microscopy (MFM), magnetization measurements with physical property measurement system (PPMS), X-ray magnetic circular dichroism (XMCD), scanning tunneling microscopy (STM ...

2024年9月20日 · The review underscores the versatility of carbon-based π-magnetic materials and their potential for integration into next-generation electronic devices. It also outlines future research directions aimed at optimizing their synthesis and …

Using STS and STM-based inelastic electron tunneling spectroscopy (IETS), we unravel unambiguous spectroscopic signatures of collective magnetism in 1 and 2 in the form of singlet-triplet spin excitations.

Recent advancements in on-surface chemistry and scanning probe techniques have significantly propelled the fabrication of carbon-based magnetic nanostructures to ofer a rich platform to probe quantum π-magnetism at the single-molecule level.

2024年1月25日 · Atomically precise graphene nanoflakes called nanographenes have emerged as a promising platform to realize carbon magnetism. Their ground state spin configuration can be anticipated by Ovchinnikov-Lieb rules based on the mismatch of π electrons from two sublattices.

2021年5月10日 · The magnetic exchange coupling in the largest nanographene (C70H22, containing five benzenoid rings along each edge), determined by inelastic electron tunnelling spectroscopy, exceeds 100 meV or...

Void-defect is a possible origin of ferromagnetic-like feature of pure carbon material. Applying density functional theory to void-defect induced graphene-nano-ribbon (GNR), a detailed relationship between multiple-spin-state and structure change was studied.