Dimensionality plays a central role in determining the collective behavior of interacting quantum systems. Engineering strongly interacting ensembles of solid-state spin defects in reduced dimensions remains a significant challenge at the interface between the applied and fundamental sciences. Here, we create and characterize a positionally disordered, quasi-one-dimensional spin chain in diamond, consisting of optically dark substitutional nitrogen defects (P1 centers) and optically addressable probe nitrogen-vacancy (NV) centers. Our approach exploits the preferential incorporation of nitrogen along step bunches formed during chemical vapor deposition to achieve both lateral and vertical confinement. Combining spatially resolved materials characterization with nanoscale quantum sensing, we establish the one-dimensional character of the optically dark, unpolarized P1 spin ensemble. We then use correlation spectroscopy to probe local spin autocorrelations and investigate infinite-temperature dipolar spin transport. Our results establish a materials-based route for engineering low-dimensional quantum spin systems.
Altermagnetism, characterized by momentum-dependent spin-splitting without net magnetization, attracts considerable attention due to its unique symmetry-governed electronic structures and potential applications in spintronic devices. Here, based on first-principles calculations, we identify Cr2WS4 monolayer as a two-di...
Ting-Ting Mi, Ao-Lin Li, Ze-Sen Fu et al.· Journal of Applied Physics· 0 citations
Spin correlations govern numerous collective behaviors of quantum materials, underpinning exotic phenomena such as unconventional superconductivity and topological magnetism. In layered materials, the interlayer spin correlation is important because it characterizes the magnetic ground state and determines spin transpo...
Akiyoshi Park, Pranshoo Upadhyay, A. Grankin et al.· 1 citation
The nitrogen-vacancy (NV) center in diamond is a prominent quantum-sensing platform. Combining readout at the quantum projection noise limit with strong dipolar interactions promises substantial gains in sensitivity. However, experimentally accessing this regime has remained a longstanding challenge. In this work, we d...
Tasuku Ono, Wei-Jie Wu, Hao-Pu Yang et al.· 0 citations
Topological insulators host exotic quantum phenomena such as the quantum spin Hall (QSH) effect, which enables dissipationless one-dimensional edge conduction. Realizing such states at room temperature and on a macroscopic scale is essential for energy-efficient electronics and quantum technologies, yet remains a fun...
Zhi-Qiang Hu, Yu-Qi Zhang, Yu-Yang Wang et al.· National Science Review· 0 citations
Altermagnets offer a promising route to spintronic devices by combining spin-split electronic states with zero net magnetization, but how reduced dimensionality reshapes their magnetic order remains poorly understood. Here, we grow bilayer-thickness CrSb (0001) films directly on SrTiO3(001) substrates by molecular beam...
Yun-Long Liu, Zi-Xuan Wu, Qin-Xi Liu et al.· Newton· 0 citations
Harnessing multiple quantum degrees of freedom, including spin, valley, and orbital angular momentum, in van der Waals (vdW) semiconductors offers a compelling route beyond conventional charge-based electronics. This perspective examines the rapid rise of spin-orbitronics and orbitronics in two-dimensional (2D) semicon...
