Hierarchical spin-orbital polarisation of a giant Rashba system

Lewis Bawden; Jonathon Mark Riley; C. H. Kim; R. Sankar; E.J. Monkman; D.E. Shai; H.I. Wei; E. Lochocki; J.W. Wells; W. Meevasana; T.K. Kim; M. Hoesch; Y. Ohtsubo; P. Le Fevre; C.J. Fennie; K.M. Shen; F.C. Chou; Phil King

doi:10.1126/sciadv.1500495

Hierarchical spin-orbital polarisation of a giant Rashba system

Lewis Bawden
, Jonathon Mark Riley
, C. H. Kim
, R. Sankar
, E.J. Monkman
, D.E. Shai
, H.I. Wei
, E. Lochocki
, J.W. Wells
, W. Meevasana
, T.K. Kim
, M. Hoesch
, Y. Ohtsubo
, P. Le Fevre
, C.J. Fennie
, K.M. Shen
, F.C. Chou
, Phil King

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

Abstract

The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a
momentum-dependent splitting of a single initially spin-degenerate band into two branches with opposite spin polarization. Combining polarization-dependent and resonant angle-resolved photoemission measurements
with density functional theory calculations, we show that the two “spin-split” branches of the model giant Rashba system BiTeI additionally develop disparate orbital textures, each of which is coupled to a distinct spin configuration. This necessitates a reinterpretation of spin splitting in Rashba-like systems and opens new possibilities for controlling spin polarization through the orbital sector.

Original language	English
Article number	e1500495
Journal	Science Advances
Volume	1
Issue number	8
DOIs	https://doi.org/10.1126/sciadv.1500495
Publication status	Published - 25 Sept 2015

Keywords

Spintronics
Rashba
BiTel
Spin-orbit coupling
Angle-resolved photoemission
Electronic structure
Orbital texture

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bawden2015sciadvance1500495
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Bawden, L., Riley, J. M., Kim, C. H., Sankar, R., Monkman, E. J., Shai, D. E., Wei, H. I., Lochocki, E., Wells, J. W., Meevasana, W., Kim, T. K., Hoesch, M., Ohtsubo, Y., Le Fevre, P., Fennie, C. J., Shen, K. M., Chou, F. C., & King, P. (2015). Hierarchical spin-orbital polarisation of a giant Rashba system. Science Advances, 1(8), Article e1500495. https://doi.org/10.1126/sciadv.1500495

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title = "Hierarchical spin-orbital polarisation of a giant Rashba system",

abstract = "The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a momentum-dependent splitting of a single initially spin-degenerate band into two branches with opposite spin polarization. Combining polarization-dependent and resonant angle-resolved photoemission measurements with density functional theory calculations, we show that the two “spin-split” branches of the model giant Rashba system BiTeI additionally develop disparate orbital textures, each of which is coupled to a distinct spin configuration. This necessitates a reinterpretation of spin splitting in Rashba-like systems and opens new possibilities for controlling spin polarization through the orbital sector. ",

keywords = "Spintronics, Rashba, BiTel, Spin-orbit coupling, Angle-resolved photoemission, Electronic structure, Orbital texture",

author = "Lewis Bawden and Riley, \{Jonathon Mark\} and Kim, \{C. H.\} and R. Sankar and E.J. Monkman and D.E. Shai and H.I. Wei and E. Lochocki and J.W. Wells and W. Meevasana and T.K. Kim and M. Hoesch and Y. Ohtsubo and \{Le Fevre\}, P. and C.J. Fennie and K.M. Shen and F.C. Chou and Phil King",

note = "This work was supported by the Engineering and Physical Sciences Research Council, UK (grant nos. EP/I031014/1 and EP/M023427/1), the Ministry of Science and Technology in Taiwan (project no. MOST-102-2119-M-002-004), NSF (grant nos. DMR-0847385, DMR-1120296, and DMR-1056441), the Office of Naval Research (grant no. N00014-12-1-0791), and TRF-SUT Grant RSA5680052. P.D.C.K. acknowledges support from the Royal Society through a University Research Fellowship. H.I.W. acknowledges support from the NSF IGERT (Integrative Graduate Education and Research Traineeship) program (DGE-0903653) and the NSF Graduate Research Fellowship under grant no. DGE-1144153. L.B. and J.M.R. acknowledge studentship funding from EPSRC through grant nos. EP/G03673X/1 and EP/L505079/1, respectively. ",

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doi = "10.1126/sciadv.1500495",

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T1 - Hierarchical spin-orbital polarisation of a giant Rashba system

AU - Bawden, Lewis

AU - Riley, Jonathon Mark

AU - Kim, C. H.

AU - Sankar, R.

AU - Monkman, E.J.

AU - Shai, D.E.

AU - Wei, H.I.

AU - Lochocki, E.

AU - Wells, J.W.

AU - Meevasana, W.

AU - Kim, T.K.

AU - Hoesch, M.

AU - Ohtsubo, Y.

AU - Le Fevre, P.

AU - Fennie, C.J.

AU - Shen, K.M.

AU - Chou, F.C.

AU - King, Phil

N1 - This work was supported by the Engineering and Physical Sciences Research Council, UK (grant nos. EP/I031014/1 and EP/M023427/1), the Ministry of Science and Technology in Taiwan (project no. MOST-102-2119-M-002-004), NSF (grant nos. DMR-0847385, DMR-1120296, and DMR-1056441), the Office of Naval Research (grant no. N00014-12-1-0791), and TRF-SUT Grant RSA5680052. P.D.C.K. acknowledges support from the Royal Society through a University Research Fellowship. H.I.W. acknowledges support from the NSF IGERT (Integrative Graduate Education and Research Traineeship) program (DGE-0903653) and the NSF Graduate Research Fellowship under grant no. DGE-1144153. L.B. and J.M.R. acknowledge studentship funding from EPSRC through grant nos. EP/G03673X/1 and EP/L505079/1, respectively.

PY - 2015/9/25

Y1 - 2015/9/25

N2 - The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a momentum-dependent splitting of a single initially spin-degenerate band into two branches with opposite spin polarization. Combining polarization-dependent and resonant angle-resolved photoemission measurements with density functional theory calculations, we show that the two “spin-split” branches of the model giant Rashba system BiTeI additionally develop disparate orbital textures, each of which is coupled to a distinct spin configuration. This necessitates a reinterpretation of spin splitting in Rashba-like systems and opens new possibilities for controlling spin polarization through the orbital sector.

AB - The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a momentum-dependent splitting of a single initially spin-degenerate band into two branches with opposite spin polarization. Combining polarization-dependent and resonant angle-resolved photoemission measurements with density functional theory calculations, we show that the two “spin-split” branches of the model giant Rashba system BiTeI additionally develop disparate orbital textures, each of which is coupled to a distinct spin configuration. This necessitates a reinterpretation of spin splitting in Rashba-like systems and opens new possibilities for controlling spin polarization through the orbital sector.

KW - Spintronics

KW - Rashba

KW - BiTel

KW - Spin-orbit coupling

KW - Angle-resolved photoemission

KW - Electronic structure

KW - Orbital texture

UR - http://advances.sciencemag.org/content/1/8/e1500495.figures-only

U2 - 10.1126/sciadv.1500495

DO - 10.1126/sciadv.1500495

M3 - Article

SN - 2375-2548

VL - 1

JO - Science Advances

JF - Science Advances

IS - 8

M1 - e1500495

ER -

Hierarchical spin-orbital polarisation of a giant Rashba system

Abstract

Keywords

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Engineering and Imaging Enhanced: Engineering and imaging enhamced spin splittings in solids

Royal Society Research Fellowship: Electronic structure engineering of novel topological phases

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

Underpinning data : Hierarchical spin-orbital polarisation of a giant Rashba system

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Hierarchical spin-orbital polarisation of a giant Rashba system

Abstract

Keywords

Access to Document

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Projects

Engineering and Imaging Enhanced: Engineering and imaging enhamced spin splittings in solids

Royal Society Research Fellowship: Electronic structure engineering of novel topological phases

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Underpinning data : Hierarchical spin-orbital polarisation of a giant Rashba system

Cite this