Frustrated Heisenberg J1-J2 model within the stretched diamond lattice of LiYb O2

Mitchell M. Bordelon; Chunxiao Liu; Lorenzo Posthuma; Eric Kenney; M. J. Graf; N. P. Butch; Arnab Banerjee; Stuart Calder; Leon Balents; Stephen D. Wilson

doi:10.1103/PhysRevB.103.014420

Frustrated Heisenberg J1-J2 model within the stretched diamond lattice of LiYb O2

Mitchell M. Bordelon, Chunxiao Liu, Lorenzo Posthuma, Eric Kenney, M. J. Graf, N. P. Butch, Arnab Banerjee, Stuart Calder, Leon Balents, Stephen D. Wilson

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Abstract

We investigate the magnetic properties of LiYbO2, containing a three-dimensionally frustrated, diamondlike lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb3+ ions in LiYbO2 enters a long-range incommensurate, helical state with an ordering wave vector k=(0.384,±0.384,0) that "locks-in"to a commensurate k=(1/3,±1/3,0) phase under the application of a magnetic field. The spiral magnetic ground state of LiYbO2 can be understood in the framework of a Heisenberg J1-J2 Hamiltonian on a stretched diamond lattice, where the propagation vector of the spiral is uniquely determined by the ratio of J2/|J1|. The pure Heisenberg model, however, fails to account for the relative phasing between the Yb moments on the two sites of the bipartite lattice, and this detail as well as the presence of an intermediate, partially disordered, magnetic state below 1 K suggests interactions beyond the classical Heisenberg description of this material.

Original language	English
Article number	014420
Journal	Physical Review B
Volume	103
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.103.014420
State	Published - Jan 14 2021

Funding

This work was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under award DE-SC0017752 (S.D.W. and M.M.B.). M.M.B. acknowledges partial support by the National Science Foundation Graduate Research Fellowship Program under Grant No. 1650114. Work by L.B. and C.L. was supported by the DOE, Office of Science, Basic Energy Sciences under Award No. DE-FG02-08ER46524. Identification of commercial equipment does not imply recommendation or endorsement by NIST. A portion of this research used resources at the High Flux Isotope Reactor and Spallation Neutron Source a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory.

Funders	Funder number
Office of Basic Energy Sciences
US Department of Energy
National Science Foundation	1650114
U.S. Department of Energy
National Institute of Standards and Technology
Office of Science
Basic Energy Sciences	DE-FG02-08ER46524
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering	DE-SC0017752

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title = "Frustrated Heisenberg J1-J2 model within the stretched diamond lattice of LiYb O2",

abstract = "We investigate the magnetic properties of LiYbO2, containing a three-dimensionally frustrated, diamondlike lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb3+ ions in LiYbO2 enters a long-range incommensurate, helical state with an ordering wave vector k=(0.384,±0.384,0) that {"}locks-in{"}to a commensurate k=(1/3,±1/3,0) phase under the application of a magnetic field. The spiral magnetic ground state of LiYbO2 can be understood in the framework of a Heisenberg J1-J2 Hamiltonian on a stretched diamond lattice, where the propagation vector of the spiral is uniquely determined by the ratio of J2/|J1|. The pure Heisenberg model, however, fails to account for the relative phasing between the Yb moments on the two sites of the bipartite lattice, and this detail as well as the presence of an intermediate, partially disordered, magnetic state below 1 K suggests interactions beyond the classical Heisenberg description of this material.",

author = "Bordelon, {Mitchell M.} and Chunxiao Liu and Lorenzo Posthuma and Eric Kenney and Graf, {M. J.} and Butch, {N. P.} and Arnab Banerjee and Stuart Calder and Leon Balents and Wilson, {Stephen D.}",

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AU - Bordelon, Mitchell M.

AU - Liu, Chunxiao

AU - Posthuma, Lorenzo

AU - Kenney, Eric

AU - Graf, M. J.

AU - Butch, N. P.

AU - Banerjee, Arnab

AU - Calder, Stuart

AU - Balents, Leon

AU - Wilson, Stephen D.

PY - 2021/1/14

Y1 - 2021/1/14

N2 - We investigate the magnetic properties of LiYbO2, containing a three-dimensionally frustrated, diamondlike lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb3+ ions in LiYbO2 enters a long-range incommensurate, helical state with an ordering wave vector k=(0.384,±0.384,0) that "locks-in"to a commensurate k=(1/3,±1/3,0) phase under the application of a magnetic field. The spiral magnetic ground state of LiYbO2 can be understood in the framework of a Heisenberg J1-J2 Hamiltonian on a stretched diamond lattice, where the propagation vector of the spiral is uniquely determined by the ratio of J2/|J1|. The pure Heisenberg model, however, fails to account for the relative phasing between the Yb moments on the two sites of the bipartite lattice, and this detail as well as the presence of an intermediate, partially disordered, magnetic state below 1 K suggests interactions beyond the classical Heisenberg description of this material.

AB - We investigate the magnetic properties of LiYbO2, containing a three-dimensionally frustrated, diamondlike lattice via neutron scattering, magnetization, and heat capacity measurements. The stretched diamond network of Yb3+ ions in LiYbO2 enters a long-range incommensurate, helical state with an ordering wave vector k=(0.384,±0.384,0) that "locks-in"to a commensurate k=(1/3,±1/3,0) phase under the application of a magnetic field. The spiral magnetic ground state of LiYbO2 can be understood in the framework of a Heisenberg J1-J2 Hamiltonian on a stretched diamond lattice, where the propagation vector of the spiral is uniquely determined by the ratio of J2/|J1|. The pure Heisenberg model, however, fails to account for the relative phasing between the Yb moments on the two sites of the bipartite lattice, and this detail as well as the presence of an intermediate, partially disordered, magnetic state below 1 K suggests interactions beyond the classical Heisenberg description of this material.

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Frustrated Heisenberg J1-J2 model within the stretched diamond lattice of LiYb O2

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