AuthorsCha, Judy J.
Williams, James R.
Bestwick, Andrew J.
KAUST Grant NumberS-11-001-12
Permanent link to this recordhttp://hdl.handle.net/10754/598748
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AbstractA simple surface band structure and a large bulk band gap have allowed Bi2Se3 to become a reference material for the newly discovered three-dimensional topological insulators, which exhibit topologically protected conducting surface states that reside inside the bulk band gap. Studying topological insulators such as Bi2Se3 in nanostructures is advantageous because of the high surfaceto-volume ratio, which enhances effects from the surface states; recently reported Aharonov-Bohm oscillation in topological insulator nanoribbons by some of us is a good example. Theoretically, introducing magnetic impurities in topological insulators is predicted to open a small gap in the surface states by breaking time-reversal symmetry. Here, we present synthesis of magnetically doped Bi 2Se3 nanoribbons by vapor-liquid-solid growth using magnetic metal thin films as catalysts. Although the doping concentration is less than ∼2 %. low-temperature transport measurements of the Fe-doped Bi2Se3 nanoribbon devices show a clear Kondo effect at temperatures below 30 K, confirming the presence of magnetic impurities in the Bi2Se3 nanoribbons. The capability to dope topological insulator nanostructures magnetically opens up exciting opportunities for spintronics. © 2010 American Chemical Society.
CitationCha JJ, Williams JR, Kong D, Meister S, Peng H, et al. (2010) Magnetic Doping and Kondo Effect in Bi 2 Se 3 Nanoribbons . Nano Lett 10: 1076–1081. Available: http://dx.doi.org/10.1021/nl100146n.
SponsorsThis work was made possible by Support from the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-11-001-12) and by an NSF-NRI Supplement to the Center for Probing the Nanoscale, an NSF Nanoscale Science and Engineering Center (PHY-0830228). D.G.-G. acknowledges support from the D. and L. Packard Foundation and the Hellman Faculty Scholar program. J.R.W. acknowledges support from the K. van Bibber Postdoctoral Fellowship of the Stanford Physics Department. A.J.B. acknowledges Support from in NDSEG Graduate Fellowship. P.G. acknowledges support from the Stanford Vice Provost for Undergraduate Education.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Topological insulator nanowires and nanoribbons.
- Authors: Kong D, Randel JC, Peng H, Cha JJ, Meister S, Lai K, Chen Y, Shen ZX, Manoharan HC, Cui Y
- Issue date: 2010 Jan
- Surface-dominated conduction in a 6 nm thick Bi2Se3 thin film.
- Authors: He L, Xiu F, Yu X, Teague M, Jiang W, Fan Y, Kou X, Lang M, Wang Y, Huang G, Yeh NC, Wang KL
- Issue date: 2012 Mar 14
- Robust surface doping of Bi2Se3 by rubidium intercalation.
- Authors: Bianchi M, Hatch RC, Li Z, Hofmann P, Song F, Mi J, Iversen BB, El-Fattah ZM, Löptien P, Zhou L, Khajetoorians AA, Wiebe J, Wiesendanger R, Wells JW
- Issue date: 2012 Aug 28
- Magnetic properties of ZnO nanoparticles.
- Authors: Garcia MA, Merino JM, Fernández Pinel E, Quesada A, de la Venta J, Ruíz González ML, Castro GR, Crespo P, Llopis J, González-Calbet JM, Hernando A
- Issue date: 2007 Jun
- Ambipolar field effect in the ternary topological insulator (Bi(x)Sb(1-x))2Te3 by composition tuning.
- Authors: Kong D, Chen Y, Cha JJ, Zhang Q, Analytis JG, Lai K, Liu Z, Hong SS, Koski KJ, Mo SK, Hussain Z, Fisher IR, Shen ZX, Cui Y
- Issue date: 2011 Oct 2