Field induced hysteretic structural phase switching and possible CDW in Re-doped MoTe2

Novel electronic systems displaying exotic physical properties can be derived from complex topological materials through chemical doping. MoTe$_2$, the candidate type-II Weyl semimetal shows dramatically enhanced superconductivity up to 4.1 K upon Re doping in Mo sites. Based on bulk transport and local scanning tunneling microscopy (STM) here we show that also leads emergence of a possible charge density wave (CDW) phase Re$_{0.2}$Mo$_{0.8}$Te$_2$. In addition, $I-V$ characteristics display non-linearity hysteresis which is commensurate with observed change tip-height ($z$) as function applied voltage $V$. The observations indicate an electric field induced hysteretic switching consistent piezoelectricity ferroelectricity.