Institute of Condensed Matter Physics (ICMP), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Phys Rev Lett. 2012 Aug 10;109(6):066101. doi: 10.1103/PhysRevLett.109.066101. Epub 2012 Aug 7.
The low-temperature adsorption of isolated transition metal adatoms (Mn, Co, and Fe) onto hexagonal boron nitride monolayers on Rh(111) creates a bistable adsorption complex. The first state considerably weakens the hexagonal boron nitride- (h-BN-) substrate bond for 60 BN unit cells, leading to a highly symmetric ring in STM images, while the second state is imaged as a conventional adatom and leaves the BN-substrate interaction intact. We demonstrate reversible switching between the two states and, thus, controlled pinning and unpinning of the h-BN layer from the metal substrate. I(z) and d lnI/dz curves are used to reveal the BN deformation in the ring state.
孤立的过渡金属原子（Mn、Co 和 Fe）在 Rh(111) 上的单层六方氮化硼低温吸附形成了一个双稳态吸附复合物。第一个状态使六方氮化硼-（h-BN-）衬底键在 60 BN 个单元显著减弱，导致 STM 图像中呈现高度对称的环，而第二个状态被成像为常规的吸附原子，并且 BN-衬底相互作用保持完整。我们证明了两个状态之间的可逆切换，从而实现了 h-BN 层从金属衬底的可控钉扎和去钉扎。I(z)和 d lnI/dz 曲线用于揭示环态中的 BN 变形。
