Udagawa Masafumi, Takayoshi Shintaro, Oka Takashi
Department of Physics, Gakushuin University, Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
Max-Planck-Institut für Physik komplexer Systeme, 01187 Dresden, Germany.
Phys Rev Lett. 2021 Mar 26;126(12):127201. doi: 10.1103/PhysRevLett.126.127201.
We propose a local detection scheme for the Majorana zero mode (MZM) carried by a vison in Kitaev's chiral spin liquid (CSL) using scanning tunneling microscopy (STM). The STM introduces a single Majorana into the system through hole-charge injection and the Majorana interacts with the MZM to form a stable composite object. We derive the exact analytical expression of single-hole Green's function in the Mott insulating limit of Kitaev's model, and show that the differential conductance has split peaks, as a consequence of resonant tunneling through the vison-hole composite. The peak splitting turns out comparable to the Majorana gap in CSL, well within the reach of experimental observation.
我们提出了一种利用扫描隧道显微镜（STM）对基塔耶夫手性自旋液体（CSL）中由vison携带的马约拉纳零模（MZM）进行局域探测的方案。STM通过空穴电荷注入将单个马约拉纳引入系统，且该马约拉纳与MZM相互作用形成一个稳定的复合物体。我们推导了基塔耶夫模型在莫特绝缘极限下单空穴格林函数的精确解析表达式，并表明由于通过vison - 空穴复合体的共振隧穿，微分电导具有分裂峰。结果表明，峰分裂与CSL中的马约拉纳能隙相当，完全在实验观测范围内。
