Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba3CoSb2O 9

H. D. Zhou; Cenke Xu; A. M. Hallas; H. J. Silverstein; C. R. Wiebe; I. Umegaki; J. Q. Yan; T. P. Murphy; J. H. Park; Y. Qiu; J. R.D. Copley; J. S. Gardner; Y. Takano

doi:10.1103/PhysRevLett.109.267206

Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba₃CoSb₂O ₉

H. D. Zhou, Cenke Xu, A. M. Hallas, H. J. Silverstein, C. R. Wiebe, I. Umegaki, J. Q. Yan, T. P. Murphy, J. H. Park, Y. Qiu, J. R.D. Copley, J. S. Gardner, Y. Takano

Correlated Electron Materials

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Abstract

Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba₃CoSb₂O₉ is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and two magnetic phase transitions bracketing an intermediate up-up-down phase in magnetic field applied along the c axis. A pronounced extensive neutron-scattering continuum above spin-wave excitations, observed below T _N, implies that the system is in close proximity to one of two spin-liquid states that have been predicted for a 2D triangular lattice.

Original language	English
Article number	267206
Journal	Physical Review Letters
Volume	109
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.109.267206
State	Published - Dec 26 2012

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Zhou, H. D., Xu, C., Hallas, A. M., Silverstein, H. J., Wiebe, C. R., Umegaki, I., Yan, J. Q., Murphy, T. P., Park, J. H., Qiu, Y., Copley, J. R. D., Gardner, J. S., & Takano, Y. (2012). Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba₃CoSb₂O ₉. Physical Review Letters, 109(26), Article 267206. https://doi.org/10.1103/PhysRevLett.109.267206

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title = "Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba3CoSb2O 9",

abstract = "Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba3CoSb2O9 is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and two magnetic phase transitions bracketing an intermediate up-up-down phase in magnetic field applied along the c axis. A pronounced extensive neutron-scattering continuum above spin-wave excitations, observed below T N, implies that the system is in close proximity to one of two spin-liquid states that have been predicted for a 2D triangular lattice.",

author = "Zhou, {H. D.} and Cenke Xu and Hallas, {A. M.} and Silverstein, {H. J.} and Wiebe, {C. R.} and I. Umegaki and Yan, {J. Q.} and Murphy, {T. P.} and Park, {J. H.} and Y. Qiu and Copley, {J. R.D.} and Gardner, {J. S.} and Y. Takano",

year = "2012",

month = dec,

day = "26",

doi = "10.1103/PhysRevLett.109.267206",

language = "English",

volume = "109",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "26",

}

Zhou, HD, Xu, C, Hallas, AM, Silverstein, HJ, Wiebe, CR, Umegaki, I, Yan, JQ, Murphy, TP, Park, JH, Qiu, Y, Copley, JRD, Gardner, JS & Takano, Y 2012, 'Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba₃CoSb₂O ₉', Physical Review Letters, vol. 109, no. 26, 267206. https://doi.org/10.1103/PhysRevLett.109.267206

TY - JOUR

T1 - Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba3CoSb2O 9

AU - Zhou, H. D.

AU - Xu, Cenke

AU - Hallas, A. M.

AU - Silverstein, H. J.

AU - Wiebe, C. R.

AU - Umegaki, I.

AU - Yan, J. Q.

AU - Murphy, T. P.

AU - Park, J. H.

AU - Qiu, Y.

AU - Copley, J. R.D.

AU - Gardner, J. S.

AU - Takano, Y.

PY - 2012/12/26

Y1 - 2012/12/26

N2 - Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba3CoSb2O9 is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and two magnetic phase transitions bracketing an intermediate up-up-down phase in magnetic field applied along the c axis. A pronounced extensive neutron-scattering continuum above spin-wave excitations, observed below T N, implies that the system is in close proximity to one of two spin-liquid states that have been predicted for a 2D triangular lattice.

AB - Using magnetic, thermal, and neutron measurements on single-crystal samples, we show that Ba3CoSb2O9 is a spin-1/2 triangular-lattice antiferromagnet with the c axis as the magnetic easy axis and two magnetic phase transitions bracketing an intermediate up-up-down phase in magnetic field applied along the c axis. A pronounced extensive neutron-scattering continuum above spin-wave excitations, observed below T N, implies that the system is in close proximity to one of two spin-liquid states that have been predicted for a 2D triangular lattice.

UR - http://www.scopus.com/inward/record.url?scp=84871813916&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.109.267206

DO - 10.1103/PhysRevLett.109.267206

M3 - Article

AN - SCOPUS:84871813916

SN - 0031-9007

VL - 109

JO - Physical Review Letters

JF - Physical Review Letters

IS - 26

M1 - 267206

ER -

Successive phase transitions and extended spin-excitation continuum in the S=12 triangular-lattice antiferromagnet Ba₃CoSb₂O ₉

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