Journal Article borophene 1D Lieb lattice 1D flat bands 1D phosphorene nanoribbons (PNRs) 1D zigzag lattice 2D materials 2D polar metal Au‐template‐assisted mechanical exfoliation Dirac cone angle-resolved photoemission spectroscopy angle‐resolved photoemission spectroscopy anisotropic buckled honeycomb binary lattice dirac nodal lines/points dry‐transfer techniques first-principles calculations first‐principles calculations interlayer excitons long-range order mixed phases moiré superlattices molecular beam epitaxy penta‐hexa‐PNRs and penta‐dodeca‐PNRs phase separation quasi-1D chains