Josephson junctions of Weyl semimetal WTe2 induced by spontaneous nucleation of PdTe superconductor

被引：9

作者：

Ohtomo, Manabu ^{[1
]}

Deacon, Russell S. ^{[2
,3
]}

Hosoda, Masayuki ^{[1
,2
]}

Fushimi, Naoki ^{[1
]}

Hosoi, Hirokazu ^{[1
]}

Randle, Michael D. ^{[2
]}

Ohfuchi, Mari ^{[1
]}

Kawaguchi, Kenichi ^{[1
]}

Ishibashi, Koji ^{[2
,3
]}

Sato, Shintaro ^{[1
]}

机构：

[1] Fujitsu Ltd, Fujitsu Res, Atsugi, Kanagawa 2430197, Japan

[2] RIKEN, Adv Device Lab, Wako, Saitama 3510198, Japan

[3] RIKEN, Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan

来源：

APPLIED PHYSICS EXPRESS | 2022年 / 15卷 / 07期

关键词：

topological; WTe2; PdTe; Josephson junction; higher-order topological;

D O I：

10.35848/1882-0786/ac75a8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the fabrication of Josephson junction devices with weak links utilizing the Weyl and higher-order topological semimetal WTe2. We show that the WTe2/Pd contact annealed at a low temperature of 80 degrees C did not exhibit superconducting properties because neither WTe2 nor Pd are superconductors in the ground state. Upon 180 degrees C annealing, spontaneous formation of superconducting PdTe due to Pd diffusion enabled us to obtain the interface between WTe2 and superconductor suitable for the Josephson junction. This result is a facile technique to make a Josephson junction and induce Cooper pairs into topological telluride semimetals.

引用

页数：5

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