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19 April 2024 |
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Article overview
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Enhancement of superconductivity in organic-inorganic hybrid topological materials | | Haoxiong Zhang
; Awabaikeli Rousuli
; Shengchun Shen
; Kenan Zhang
; Chong Wang
; Laipeng Luo
; Jizhang Wang
; Yang Wu
; Yong Xu
; Wenhui Duan
; Hong Yao
; Pu Yu
; Shuyun Zhou
; | | Date: |
6 Nov 2019 | | Abstract: | Inducing or enhancing superconductivity in topological materials is an
important route toward topological superconductivity. Reducing the thickness of
transition metal dichalcogenides (e.g. WTe2 and MoTe2) has provided an
important pathway to engineer superconductivity in topological matters; for
instance, emergent superconductivity with Tc=0.82 K was observed in monolayer
WTe2 which also hosts intriguing quantum spin Hall effect, although the bulk
crystal is nonsuperconducting. However, such monolayer sample is difficult to
obtain, unstable in air, and with extremely low Tc, which could pose a grand
challenge for practical applications. Here we report an experimentally
convenient approach to control the interlayer coupling to achieve tailored
topological properties, enhanced superconductivity and good sample stability
through organic cation intercalation of the Weyl semimetals MoTe2 and WTe2. The
as-formed organic-inorganic hybrid crystals are weak topological insulators
with enhanced Tc of 7.0 K for intercalated MoTe2 (0.25 K for pristine crystal)
and 2.3 K for intercalated WTe2 (2.8 times compared to monolayer WTe2). Such
organic-cationintercalation method can be readily applied to many other layered
crystals, providing a new pathway for manipulating their electronic,
topological and superconducting properties. | | Source: | arXiv, 1911.2228 | | Services: | Forum | Review | PDF | Favorites | |
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