Spin-polarized quantum well states on Bi2-xFexSe3

Michael M. Yee; Z. H. Zhu; Anjan Soumyanarayanan; Yang He; Can Li Song; Ekaterina Pomjakushina; Zaher Salman; Amit Kanigel; Kouji Segawa; Yoichi Ando; Jennifer E. Hoffman

doi:10.1103/PhysRevB.91.161306

Spin-polarized quantum well states on Bi2-xFexSe3

Michael M. Yee, Z. H. Zhu, Anjan Soumyanarayanan, Yang He, Can Li Song, Ekaterina Pomjakushina, Zaher Salman, Amit Kanigel, Kouji Segawa, Yoichi Ando, Jennifer E. Hoffman

Physics

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Low temperature scanning tunneling microscopy is used to image the doped topological insulator Bi2-xFexSe3. Interstitial Fe defects allow the detection of quasiparticle interference, and the reconstruction of the empty state band structure. Quantitative comparison between measured data and density functional theory calculations reveals the unexpected coexistence of quantum well states (QWSs) with topological surface states (TSSs) on the atomically clean surface of Bi2-xFexSe3. Spectroscopic measurements quantify the breakdown of linear dispersion due to hexagonal warping. Nonetheless, both QWSs and TSSs remain spin polarized and protected from backscattering to almost 1 eV above the Dirac point, suggesting their utility for spin-based applications.

Original language	English
Article number	161306
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.91.161306
State	Published - 24 Apr 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.91.161306

Cite this

@article{598b1c5316704a3b9c73cfdeee73aacd,

title = "Spin-polarized quantum well states on Bi2-xFexSe3",

abstract = "Low temperature scanning tunneling microscopy is used to image the doped topological insulator Bi2-xFexSe3. Interstitial Fe defects allow the detection of quasiparticle interference, and the reconstruction of the empty state band structure. Quantitative comparison between measured data and density functional theory calculations reveals the unexpected coexistence of quantum well states (QWSs) with topological surface states (TSSs) on the atomically clean surface of Bi2-xFexSe3. Spectroscopic measurements quantify the breakdown of linear dispersion due to hexagonal warping. Nonetheless, both QWSs and TSSs remain spin polarized and protected from backscattering to almost 1 eV above the Dirac point, suggesting their utility for spin-based applications.",

author = "Yee, {Michael M.} and Zhu, {Z. H.} and Anjan Soumyanarayanan and Yang He and Song, {Can Li} and Ekaterina Pomjakushina and Zaher Salman and Amit Kanigel and Kouji Segawa and Yoichi Ando and Hoffman, {Jennifer E.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = apr,

day = "24",

doi = "10.1103/PhysRevB.91.161306",

language = "الإنجليزيّة",

volume = "91",

number = "16",

}

TY - JOUR

T1 - Spin-polarized quantum well states on Bi2-xFexSe3

AU - Yee, Michael M.

AU - Zhu, Z. H.

AU - Soumyanarayanan, Anjan

AU - He, Yang

AU - Song, Can Li

AU - Pomjakushina, Ekaterina

AU - Salman, Zaher

AU - Kanigel, Amit

AU - Segawa, Kouji

AU - Ando, Yoichi

AU - Hoffman, Jennifer E.

PY - 2015/4/24

Y1 - 2015/4/24

N2 - Low temperature scanning tunneling microscopy is used to image the doped topological insulator Bi2-xFexSe3. Interstitial Fe defects allow the detection of quasiparticle interference, and the reconstruction of the empty state band structure. Quantitative comparison between measured data and density functional theory calculations reveals the unexpected coexistence of quantum well states (QWSs) with topological surface states (TSSs) on the atomically clean surface of Bi2-xFexSe3. Spectroscopic measurements quantify the breakdown of linear dispersion due to hexagonal warping. Nonetheless, both QWSs and TSSs remain spin polarized and protected from backscattering to almost 1 eV above the Dirac point, suggesting their utility for spin-based applications.

AB - Low temperature scanning tunneling microscopy is used to image the doped topological insulator Bi2-xFexSe3. Interstitial Fe defects allow the detection of quasiparticle interference, and the reconstruction of the empty state band structure. Quantitative comparison between measured data and density functional theory calculations reveals the unexpected coexistence of quantum well states (QWSs) with topological surface states (TSSs) on the atomically clean surface of Bi2-xFexSe3. Spectroscopic measurements quantify the breakdown of linear dispersion due to hexagonal warping. Nonetheless, both QWSs and TSSs remain spin polarized and protected from backscattering to almost 1 eV above the Dirac point, suggesting their utility for spin-based applications.

UR - http://www.scopus.com/inward/record.url?scp=84929206887&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.91.161306

DO - 10.1103/PhysRevB.91.161306

M3 - مقالة

SN - 1098-0121

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 16

M1 - 161306

ER -

Spin-polarized quantum well states on Bi2-xFexSe3

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Cite this