Electronic fingerprints of Cr and v dopants in the topological insulator Sb2Te3

Wenhan Zhang, Damien West, Seng Huat Lee, Yunsheng Qiu, Cui Zu Chang, Jagadeesh S. Moodera, Yew San Hor, Shengbai Zhang, Weida Wu

Research output: Contribution to journalArticle

Abstract

By combining scanning tunneling microscopy/spectroscopy and first-principles calculations, we systematically study the local electronic states of magnetic dopants V and Cr in the topological insulator (TI) Sb2Te3. Spectroscopic imaging shows diverse local defect states between Cr and V, which agree with our first-principle calculations. The unique spectroscopic features of V and Cr dopants provide electronic fingerprints for the codoped magnetic TI samples with the enhanced quantum anomalous Hall effect. Our results also facilitate the exploration of the underlying mechanism of the enhanced quantum anomalous Hall temperature in Cr/V codoped TIs.

Original languageEnglish (US)
Article number115165
JournalPhysical Review B
Volume98
Issue number11
DOIs
StatePublished - Sep 28 2018

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Doping (additives)
insulators
Quantum Hall effect
Electronic states
Scanning tunneling microscopy
electronics
Hall effect
scanning tunneling microscopy
Spectroscopy
Imaging techniques
Defects
defects
spectroscopy
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Zhang, Wenhan ; West, Damien ; Lee, Seng Huat ; Qiu, Yunsheng ; Chang, Cui Zu ; Moodera, Jagadeesh S. ; Hor, Yew San ; Zhang, Shengbai ; Wu, Weida. / Electronic fingerprints of Cr and v dopants in the topological insulator Sb2Te3. In: Physical Review B. 2018 ; Vol. 98, No. 11.
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abstract = "By combining scanning tunneling microscopy/spectroscopy and first-principles calculations, we systematically study the local electronic states of magnetic dopants V and Cr in the topological insulator (TI) Sb2Te3. Spectroscopic imaging shows diverse local defect states between Cr and V, which agree with our first-principle calculations. The unique spectroscopic features of V and Cr dopants provide electronic fingerprints for the codoped magnetic TI samples with the enhanced quantum anomalous Hall effect. Our results also facilitate the exploration of the underlying mechanism of the enhanced quantum anomalous Hall temperature in Cr/V codoped TIs.",
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Electronic fingerprints of Cr and v dopants in the topological insulator Sb2Te3. / Zhang, Wenhan; West, Damien; Lee, Seng Huat; Qiu, Yunsheng; Chang, Cui Zu; Moodera, Jagadeesh S.; Hor, Yew San; Zhang, Shengbai; Wu, Weida.

In: Physical Review B, Vol. 98, No. 11, 115165, 28.09.2018.

Research output: Contribution to journalArticle

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AU - West, Damien

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AU - Moodera, Jagadeesh S.

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