CdTe-HgTe core-shell nanowire growth controlled by RHEED

Abstract

We present results on the growth of CdTe-HgTe core-shell nanowires, a realization of a quasi one-dimensional heterostructure of the topological insulator HgTe. The growth is a two step process consisting of the growth of single crystalline zinc blende CdTe nanowires with the vapor-liquid-solid method and the overgrowth of these wires with HgTe such that a closed shell is formed around the CdTe core structure. The CdTe wire growth is monitored by RHEED allowing us to infer information on the crystal properties from the electron diffraction pattern. This information is used to find and control the optimal growth temperature. High quality single crystal CdTe nanowires grow with a preferred orientation. For the growth of the conductive HgTe shell structure we find that the supplied Hg:Te ratio is the crucial parameter to facilitate growth on all surface facets.

References in corpus (3)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Topological Insulators with Inversion Symmetry

Cited by in corpus (9)

• Magnetoconductance, Quantum Hall Effect, and Coulomb Blockade in Topological Insulator Nanocones
• Topological states in superlattices of HgTe-class materials for engineering three-dimensional flat bands
• Proximity Induced Superconductivity in CdTe-HgTe Core-Shell Nanowires
• Nanowire growth and sublimation: CdTe quantum dots in ZnTe nanowires
• Theory of magnetotransport in shaped topological insulator nanowires
• Residual strain in free-standing CdTe nanowires overgrown with HgTe
• Subband structure of a cylindrical HgTe nanowire: transition from normal type to inverted type
• Hearing the shape of a Dirac drum: Dual quantum Hall states on curved surfaces
• Band inversion transition in HgTe nanowire grown along the [001] direction