CY3530 HfTe5 crystal

Catalog No.	CY3530
Material	HfTe5
Production Method	Chemical vapor transport 99.9995% purity
Size	2-4mm in size
Crystal Structure	Orthorhombic phase

HfTe5 crystal is a member of the layered transition metal pentatelluride material family. Stanford Advanced Materials (SAM) has rich experience in manufacturing and supplying high-quality Optical Products.

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Description

Specification

HfTe5 crystal Description

HfTe5 crystal is a member of the layered transition metal pentatelluride material family. It crystallizes in the orthorhombic phase and crystals exhibit a perfectly layered nature. HfTe5 is at the boundary of weak & strong topological insulator (TI) and might crossover to a Dirac semimetal. It also exhibits a superconducting state under applied hydrostatic pressure. The resulting crystals have mm size single domains (world record), perfectly layered nature (ideal for exfoliation and large area monolayer production). The material exfoliates rather easily but in air, the surface transforms into TeO2 or other tellurium oxide complexes due to the high electron affinity of Hf and HfTe5 surfaces. Bulk crystals are stable in air but monolayers require handling in the glovebox or inert gas conditions. Samples are shipped under pressure sample boxes back-filled with Ar to safely ship the samples.

Samples can be easily exfoliated into HfTe5 sheets wherein each HfTe5 chain is quasi-weakly bonded to each other.

HfTe5 crystal Specifications

Sample size	~2-4 mm
Material properties	Anisotropic topological insulator, semimetal, superconductor
Crystal structure	Orthorhombic phase
Unit cell parameters	a= 0.403 nm b=0.816 nm, c=1.388 nm, α=β=90°, γ=104.3°
Production method	Chemical vapor transport 99.9995% purity
Characterization methods	SIMS, XRD, EDS, Raman