通过拓扑能隙协议的 InAs-Al 混合器件
介观与纳米尺度物理
2025-01-08 v4
摘要
我们展示了半导体-超导体异质结构器件的测量与模拟，其与拓扑超导性和马约拉纳零模的观测一致。这些器件由高迁移率二维电子气制备，其中准一维线由静电栅定义。这些器件可测量局域与非局域输运性质，并经由大量模拟优化以确保对非均匀性与无序的鲁棒性。我们的主要结果是，依据设计工程规范制备的若干器件已通过 Pikulin 等人 [arXiv:2103.12217] 中定义的拓扑能隙协议。该协议是一项严格测试，由在改变磁场、半导体电子密度和结透明度时执行的一系列三端局域与非局域输运测量组成。如大规模无序模拟所确定，通过协议表明检测到承载马约拉纳零模的拓扑相的概率很高。我们的实验结果与进入拓扑超导相的量子相变一致，该相在磁场上延展数百毫特斯拉、在栅压上延展数毫伏，对应于半导体线中约一百微电子伏的塞曼能量和化学势。这些区域呈现体能隙的闭合与重开，同时器件两端出现零偏导峰且耐受结透明度的变化。我们器件中提取的最大拓扑能隙为 20-60 eV。该演示是涉及马约拉纳零模融合与编织实验的先决条件。
引用
@article{arxiv.2207.02472,
title = {InAs-Al Hybrid Devices Passing the Topological Gap Protocol},
author = {Morteza Aghaee and Arun Akkala and Zulfi Alam and Rizwan Ali and Alejandro Alcaraz Ramirez and Mariusz Andrzejczuk and Andrey E Antipov and Pavel Aseev and Mikhail Astafev and Bela Bauer and Jonathan Becker and Srini Boddapati and Frenk Boekhout and Jouri Bommer and Esben Bork Hansen and Tom Bosma and Leo Bourdet and Samuel Boutin and Philippe Caroff and Lucas Casparis and Maja Cassidy and Anna Wulf Christensen and Noah Clay and William S Cole and Fabiano Corsetti and Ajuan Cui and Paschalis Dalampiras and Anand Dokania and Gijs de Lange and Michiel de Moor and Juan Carlos Estrada Saldaña and Saeed Fallahi and Zahra Heidarnia Fathabad and John Gamble and Geoff Gardner and Deshan Govender and Flavio Griggio and Ruben Grigoryan and Sergei Gronin and Jan Gukelberger and Sebastian Heedt and Jesús Herranz Zamorano and Samantha Ho and Ulrik Laurens Holgaard and William Hvidtfelt Padkær Nielsen and Henrik Ingerslev and Peter Jeppesen Krogstrup and Linda Johansson and Jeffrey Jones and Ray Kallaher and Farhad Karimi and Torsten Karzig and Evelyn King and Maren Elisabeth Kloster and Christina Knapp and Dariusz Kocon and Jonne Koski and Pasi Kostamo and Mahesh Kumar and Tom Laeven and Thorvald Larsen and Kongyi Li and Tyler Lindemann and Julie Love and Roman Lutchyn and Michael Manfra and Elvedin Memisevic and Chetan Nayak and Bas Nijholt and Morten Hannibal Madsen and Signe Markussen and Esteban Martinez and Robert McNeil and Andrew Mullally and Jens Nielsen and Anne Nurmohamed and Eoin O'Farrell and Keita Otani and Sebastian Pauka and Karl Petersson and Luca Petit and Dima Pikulin and Frank Preiss and Marina Quintero Perez and Katrine Rasmussen and Mohana Rajpalke and Davydas Razmadze and Outi Reentila and David Reilly and Richard Rouse and Ivan Sadovskyy and Lauri Sainiemi and Sydney Schreppler and Vadim Sidorkin and Amrita Singh and Shilpi Singh and Sarat Sinha and Patrick Sohr and Tomaš Stankevič and Lieuwe Stek and Henri Suominen and Judith Suter and Vicky Svidenko and Sam Teicher and Mine Temuerhan and Nivetha Thiyagarajah and Raj Tholapi and Mason Thomas and Emily Toomey and Shivendra Upadhyay and Ivan Urban and Saulius Vaitiekėnas and Kevin Van Hoogdalem and Dmitrii V. Viazmitinov and Steven Waddy and David Van Woerkom and Dominik Vogel and John Watson and Joseph Weston and Georg W. Winkler and Chung Kai Yang and Sean Yau and Daniel Yi and Emrah Yucelen and Alex Webster and Roland Zeisel and Ruichen Zhao},
journal= {arXiv preprint arXiv:2207.02472},
year = {2025}
}
备注
Final version