Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron loc...Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron localizations often dominate the conductivity of 1D nanowires.Here,we successfully grew Bi single nanowires and nanowire arrays on Pb-√7×√3substrates via molecular beam epitaxy,both of which exhibit metallic behavior.Using scanning tunneling microscopy and first-principles density functional theory calculations,the interwire coupling and the correlation between nanowire bundles and electronic properties are investigated.A characteristic peak at 0.75 e V is observed on single wires and wire bundles of up to four nanowires,whereas interwire coupling weakens it and makes it disappear for wire bundles of five and above.These findings illustrate that the interwire coupling plays a critical role in the electronic structure of the1D system,which provides insights for the design of nano-electronics materials.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12374196,92165201,and 11634011)the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302800)+2 种基金the CAS Project for Young Scientists in Basic Research(Grant No.YSBR-046)the Fundamental Research Funds for the Central Universities(Grant Nos.WK3510000006 and WK3430000003)the Initiative Project in Quantum Information Technologies of Anhui Province,China(Grant No.AHY170000)。
文摘Confining particles in one-dimensional(1D)systems profoundly modifies their electronic behaviors,which have been extensively demonstrated in carbon nanotubes and atomic chains.Structural instabilities and electron localizations often dominate the conductivity of 1D nanowires.Here,we successfully grew Bi single nanowires and nanowire arrays on Pb-√7×√3substrates via molecular beam epitaxy,both of which exhibit metallic behavior.Using scanning tunneling microscopy and first-principles density functional theory calculations,the interwire coupling and the correlation between nanowire bundles and electronic properties are investigated.A characteristic peak at 0.75 e V is observed on single wires and wire bundles of up to four nanowires,whereas interwire coupling weakens it and makes it disappear for wire bundles of five and above.These findings illustrate that the interwire coupling plays a critical role in the electronic structure of the1D system,which provides insights for the design of nano-electronics materials.
