Origin of the extremely large magnetoresistance in the semimetal YSb

J. Xu; N. J. Ghimire; J. S. Jiang; Z. L. Xiao; A. S. Botana; Y. L. Wang; Y. Hao; J. E. Pearson; W. K. Kwok

doi:10.1103/PhysRevB.96.075159

Origin of the extremely large magnetoresistance in the semimetal YSb

J. Xu, N. J. Ghimire, J. S. Jiang, Z. L. Xiao, A. S. Botana, Y. L. Wang, Y. Hao, J. E. Pearson, W. K. Kwok

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

49 Scopus citations

Abstract

Electron-hole (e-h) compensation is a hallmark of multiband semimetals with extremely large magnetoresistance (XMR) and has been considered to be the basis for XMR. Recent spectroscopic experiments, however, reveal that YSb with nonsaturating magnetoresistance is uncompensated, questioning the e-h compensation scenario for XMR. Here we demonstrate with magnetoresistivity and angle-dependent Shubnikov-de Haas (SdH) quantum oscillation measurements that YSb does have nearly perfect e-h compensation, with a density ratio of ∼0.95 for electrons and holes. The density and mobility anisotropy of the charge carriers revealed in the SdH experiments allow us to quantitatively describe the magnetoresistance with an anisotropic multiband model that includes contributions from all Fermi pockets. We elucidate the role of compensated multibands in the occurrence of XMR by demonstrating the evolution of calculated magnetoresistances for a single band and for various combinations of electron and hole Fermi pockets.

Original language	English (US)
Article number	075159
Journal	Physical Review B
Volume	96
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.96.075159
State	Published - Aug 29 2017
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.96.075159

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title = "Origin of the extremely large magnetoresistance in the semimetal YSb",

abstract = "Electron-hole (e-h) compensation is a hallmark of multiband semimetals with extremely large magnetoresistance (XMR) and has been considered to be the basis for XMR. Recent spectroscopic experiments, however, reveal that YSb with nonsaturating magnetoresistance is uncompensated, questioning the e-h compensation scenario for XMR. Here we demonstrate with magnetoresistivity and angle-dependent Shubnikov-de Haas (SdH) quantum oscillation measurements that YSb does have nearly perfect e-h compensation, with a density ratio of ∼0.95 for electrons and holes. The density and mobility anisotropy of the charge carriers revealed in the SdH experiments allow us to quantitatively describe the magnetoresistance with an anisotropic multiband model that includes contributions from all Fermi pockets. We elucidate the role of compensated multibands in the occurrence of XMR by demonstrating the evolution of calculated magnetoresistances for a single band and for various combinations of electron and hole Fermi pockets.",

author = "J. Xu and Ghimire, {N. J.} and Jiang, {J. S.} and Xiao, {Z. L.} and Botana, {A. S.} and Wang, {Y. L.} and Y. Hao and Pearson, {J. E.} and Kwok, {W. K.}",

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doi = "10.1103/PhysRevB.96.075159",

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AU - Xu, J.

AU - Ghimire, N. J.

AU - Jiang, J. S.

AU - Xiao, Z. L.

AU - Botana, A. S.

AU - Wang, Y. L.

AU - Hao, Y.

AU - Pearson, J. E.

AU - Kwok, W. K.

PY - 2017/8/29

Y1 - 2017/8/29

N2 - Electron-hole (e-h) compensation is a hallmark of multiband semimetals with extremely large magnetoresistance (XMR) and has been considered to be the basis for XMR. Recent spectroscopic experiments, however, reveal that YSb with nonsaturating magnetoresistance is uncompensated, questioning the e-h compensation scenario for XMR. Here we demonstrate with magnetoresistivity and angle-dependent Shubnikov-de Haas (SdH) quantum oscillation measurements that YSb does have nearly perfect e-h compensation, with a density ratio of ∼0.95 for electrons and holes. The density and mobility anisotropy of the charge carriers revealed in the SdH experiments allow us to quantitatively describe the magnetoresistance with an anisotropic multiband model that includes contributions from all Fermi pockets. We elucidate the role of compensated multibands in the occurrence of XMR by demonstrating the evolution of calculated magnetoresistances for a single band and for various combinations of electron and hole Fermi pockets.

AB - Electron-hole (e-h) compensation is a hallmark of multiband semimetals with extremely large magnetoresistance (XMR) and has been considered to be the basis for XMR. Recent spectroscopic experiments, however, reveal that YSb with nonsaturating magnetoresistance is uncompensated, questioning the e-h compensation scenario for XMR. Here we demonstrate with magnetoresistivity and angle-dependent Shubnikov-de Haas (SdH) quantum oscillation measurements that YSb does have nearly perfect e-h compensation, with a density ratio of ∼0.95 for electrons and holes. The density and mobility anisotropy of the charge carriers revealed in the SdH experiments allow us to quantitatively describe the magnetoresistance with an anisotropic multiband model that includes contributions from all Fermi pockets. We elucidate the role of compensated multibands in the occurrence of XMR by demonstrating the evolution of calculated magnetoresistances for a single band and for various combinations of electron and hole Fermi pockets.

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Origin of the extremely large magnetoresistance in the semimetal YSb

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