Dept. of Condensed Matter Physics, Braun Center for Submicron Research, Weizmann Institute of Science , Rehovot 76100, Israel.
Institute of Physics Polish Academy of Science , Al. Lotnikow 32/46, 02-668 Warsaw, Poland.
Nano Lett. 2017 Jan 11;17(1):531-537. doi: 10.1021/acs.nanolett.6b04598. Epub 2016 Dec 28.
The prediction that Majorana Fermions obey nonabelian exchange statistics can only be tested by interchanging such carriers in "Y'- or 'X'- (or 'K'-) shaped nanowire networks. Here we report the molecular beam epitaxy (MBE) growth of 'K'-shaped InAs nanowires consisting of two interconnected wurtzite wires with an additional zinc-blende wire in between. Moreover, occasionally, the growth results in formation of a purely wurtzite two-dimensional plate between the zinc-blende nanowire and one (sometimes both) intersecting wurtzite arm. By modeling the crystal structure we explain the transformation from wurtzite to zinc-blende and the coexistence of both crystallographic phases in such nanowire structures. To the best of our knowledge neither the MBE growth of an InAs nano-object showing combination of wurtzite and zinc-blende crystal structures nor the growth of pure wurtzite InAs nanoplates in this geometry has been reported before.
马约拉纳费米子服从非阿贝尔交换统计的预言只能通过在“Y'或'X'（或'K'）形状纳米线网络中交换这些载流子来验证。在这里，我们报告了由两个相互连接的纤锌矿线和中间的一个闪锌矿线组成的“K”形 InAs 纳米线的分子束外延（MBE）生长。此外，生长过程中偶尔会在闪锌矿纳米线和一个（有时是两个）相交的纤锌矿臂之间形成纯纤锌矿二维板。通过对晶体结构进行建模，我们解释了从纤锌矿到闪锌矿的转变以及这种纳米线结构中两种结晶相的共存。据我们所知，以前既没有报道过同时具有纤锌矿和闪锌矿晶体结构的 InAs 纳米物体的 MBE 生长，也没有报道过这种几何形状的纯纤锌矿 InAs 纳米板的生长。
