Giant spin-orbit splitting in a HgTe quantum well

Y. S. Gui; C. R. Becker; N. Dai; J. Liu; Z. J. Qiu; E. G. Novik; M. Schäfer; X. Z. Shu; J. H. Chu; H. Buhmann; L. W. Molenkamp

doi:10.1103/PhysRevB.70.115328

Giant spin-orbit splitting in a HgTe quantum well

Y. S. Gui^*
, C. R. Becker
, N. Dai
, J. Liu
, Z. J. Qiu
, E. G. Novik
, M. Schäfer
, X. Z. Shu
, J. H. Chu
, H. Buhmann
, L. W. Molenkamp

^*Corresponding author for this work

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

117 Scopus citations

Abstract

We have investigated beating patterns in Shubnikov-de Haas oscillations for HgTe/Hg_0.3Cd_0.7Te(001) quantum wells with electron densities of 2-3 × 10¹² cm^-2. Up to 12 beating nodes have been observed at magnetic fields between 0.9 and 6 T. Zero-magnetic-field spin-orbit splitting energies up to 30 meV have been directly determined from the node positions as well as from the intersection of self-consistently calculated Landau levels. These values, which exceed the thermal broadening of Landau levels, k_BT, at room temperature, are in good agreement with Rashba spin-orbit splitting energies calculated by means of an 8 × 8 k · p Kane model. The experimental Shubnikov-de Haas oscillations are also in good agreement with numerical simulations based on this model.

Original language	English
Article number	115328
Pages (from-to)	115328-1-115328-5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.70.115328
State	Published - Sep 2004
Externally published	Yes

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10.1103/PhysRevB.70.115328

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title = "Giant spin-orbit splitting in a HgTe quantum well",

abstract = "We have investigated beating patterns in Shubnikov-de Haas oscillations for HgTe/Hg0.3Cd0.7Te(001) quantum wells with electron densities of 2-3 × 1012 cm-2. Up to 12 beating nodes have been observed at magnetic fields between 0.9 and 6 T. Zero-magnetic-field spin-orbit splitting energies up to 30 meV have been directly determined from the node positions as well as from the intersection of self-consistently calculated Landau levels. These values, which exceed the thermal broadening of Landau levels, kBT, at room temperature, are in good agreement with Rashba spin-orbit splitting energies calculated by means of an 8 × 8 k · p Kane model. The experimental Shubnikov-de Haas oscillations are also in good agreement with numerical simulations based on this model.",

author = "Gui, \{Y. S.\} and Becker, \{C. R.\} and N. Dai and J. Liu and Qiu, \{Z. J.\} and Novik, \{E. G.\} and M. Sch{\"a}fer and Shu, \{X. Z.\} and Chu, \{J. H.\} and H. Buhmann and Molenkamp, \{L. W.\}",

year = "2004",

month = sep,

doi = "10.1103/PhysRevB.70.115328",

language = "英语",

volume = "70",

pages = "115328--1--115328--5",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "0163-1829",

publisher = "American Physical Society",

number = "11",

}

TY - JOUR

T1 - Giant spin-orbit splitting in a HgTe quantum well

AU - Gui, Y. S.

AU - Becker, C. R.

AU - Dai, N.

AU - Liu, J.

AU - Qiu, Z. J.

AU - Novik, E. G.

AU - Schäfer, M.

AU - Shu, X. Z.

AU - Chu, J. H.

AU - Buhmann, H.

AU - Molenkamp, L. W.

PY - 2004/9

Y1 - 2004/9

N2 - We have investigated beating patterns in Shubnikov-de Haas oscillations for HgTe/Hg0.3Cd0.7Te(001) quantum wells with electron densities of 2-3 × 1012 cm-2. Up to 12 beating nodes have been observed at magnetic fields between 0.9 and 6 T. Zero-magnetic-field spin-orbit splitting energies up to 30 meV have been directly determined from the node positions as well as from the intersection of self-consistently calculated Landau levels. These values, which exceed the thermal broadening of Landau levels, kBT, at room temperature, are in good agreement with Rashba spin-orbit splitting energies calculated by means of an 8 × 8 k · p Kane model. The experimental Shubnikov-de Haas oscillations are also in good agreement with numerical simulations based on this model.

AB - We have investigated beating patterns in Shubnikov-de Haas oscillations for HgTe/Hg0.3Cd0.7Te(001) quantum wells with electron densities of 2-3 × 1012 cm-2. Up to 12 beating nodes have been observed at magnetic fields between 0.9 and 6 T. Zero-magnetic-field spin-orbit splitting energies up to 30 meV have been directly determined from the node positions as well as from the intersection of self-consistently calculated Landau levels. These values, which exceed the thermal broadening of Landau levels, kBT, at room temperature, are in good agreement with Rashba spin-orbit splitting energies calculated by means of an 8 × 8 k · p Kane model. The experimental Shubnikov-de Haas oscillations are also in good agreement with numerical simulations based on this model.

UR - https://www.scopus.com/pages/publications/20844463772

U2 - 10.1103/PhysRevB.70.115328

DO - 10.1103/PhysRevB.70.115328

M3 - 文章

AN - SCOPUS:20844463772

SN - 0163-1829

VL - 70

SP - 115328-1-115328-5

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 11

M1 - 115328

ER -

Giant spin-orbit splitting in a HgTe quantum well

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