Local Magnetic Suppression of Topological Surface States in Bi2Te3 Nanowires

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• 作者：Johannes Gooth ; Robert Zierold ; Philip Sergelius ; Bacel Hamdou ; Javier Garcia ; Christine Damm ; Bernd Rellinghaus ; Håkan Jan Pettersson ; Anna Pertsova ; Carlo Canali ; Mattias Borg ; Kornelius Nielsch
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：July 26, 2016
• 年：2016
• 卷：10
• 期：7
• 页码：7180-7188
• 全文大小：549K
• 年卷期：0
• ISSN：1936-086X

文摘

Locally induced, magnetic order on the surface of a topological insulator nanowire could enable room-temperature topological quantum devices. Here we report on the realization of selective magnetic control over topological surface states on a single facet of a rectangular Bi₂Te₃ nanowire via a magnetic insulating Fe₃O₄ substrate. Low-temperature magnetotransport studies provide evidence for local time-reversal symmetry breaking and for enhanced gapping of the interfacial 1D energy spectrum by perpendicular magnetic-field components, leaving the remaining nanowire facets unaffected. Our results open up great opportunities for development of dissipation-less electronics and spintronics.