Unlocking the potential of topological order in many-body spin systems has been a key goal
in quantum materials research. Despite extensive efforts, the quest for a versatile platform …

Phenalenyl (C13H9) is an open-shell spin-1/2 nanographene. Using scanning tunneling
microscopy (STM) inelastic electron tunneling spectroscopy (IETS), covalently bonded …

Realization of topological quantum states in carbon nanostructures has recently emerged as
a promising platform for hosting highly coherent and controllable quantum dot spin qubits …

Haldane's seminal work established two fundamentally different types of excitation spectra
for antiferromagnetic Heisenberg quantum spin chains: gapped excitations in integer-spin …

The study of open-shell nanographenes has relied on a paradigm where spins are the only
low-energy degrees of freedom. Here we show that some nanographenes can host low …

Nanographene-based magnetism at interfaces offers an avenue to designer quantum
materials towards novel phases of matter and atomic-scale applications. Key to spintronics …

Molecular π-magnets based on single organic molecules have attracted increasing attention
for their potential applications in optoelectronics and spintronics. Global aromaticity in …

In the classic view, spin pairing occurs between two electrons in a chemical bond where the
bonding interaction compensates for the penalty of electrostatic repulsion. It is a mystery …

We propose a general principle for realizing second-order topological corner states in the
modified Kane-Mele model with magnetization. It is demonstrated that the sign of the edge …

Quantum tunneling, as a quintessential quantum phenomenon, has been investigated in
detail both theoretically and experimentally. Still, the physical picture of the tunneling …