Spinon continuum in the Heisenberg quantum chain compound Sr2 V3 O9

Shang Gao; Ling Fang Lin; Pontus Laurell; Qiang Chen; Qing Huang; Clarina dela Cruz; Krishnamurthy V. Vemuru; Mark D. Lumsden; Stephen E. Nagler; Gonzalo Alvarez; Elbio Dagotto; Haidong Zhou; Andrew D. Christianson; Matthew B. Stone

doi:10.1103/PhysRevB.109.L020402

Spinon continuum in the Heisenberg quantum chain compound Sr2 V3 O9

Shang Gao, Ling Fang Lin, Pontus Laurell, Qiang Chen, Qing Huang, Clarina dela Cruz, Krishnamurthy V. Vemuru, Mark D. Lumsden, Stephen E. Nagler, Gonzalo Alvarez, Elbio Dagotto, Haidong Zhou, Andrew D. Christianson, Matthew B. Stone

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

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Abstract

Magnetic excitations in the spin chain candidate Sr2V3O9 have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandwidth of ∼22 meV is observed along the chain formed by alternating magnetic V4+ and nonmagnetic V5+ ions, which reveals the importance of the orbital degree of freedom in determining the chain axis as identified by prior electronic structure calculations. Incipient magnetic Bragg peaks due to weak ferromagnetic interchain couplings emerge when approaching the magnetic transition at TN∼5.3 K, while the excitations remain gapless within the instrumental resolution. Comparisons to the Bethe ansatz, density matrix renormalization group calculations, and effective field theories confirm Sr2V3O9 as a host of weakly coupled S=1/2 chains dominated by antiferromagnetic intrachain interactions of ∼7.1(1) meV.

Original language	English
Article number	L020402
Journal	Physical Review B
Volume	109
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.109.L020402
State	Published - Jan 1 2024

Funding

Acknowledgments. We acknowledge helpful discussions with Jianda Wu, Jiahao Yang, and Yuan Li. This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. This research used resources at the Spallation Neutron Source (SNS) and the High Flux Isotope Reactor (HFIR); both are DOE Office of Science User Facilities operated by the Oak Ridge National Laboratory (ORNL). The beam time was allocated to Proposal No. IPTS-26732.1. The work of S.E.N. and G.A. was supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center. Q.C., Q.H., and H.Z. acknowledge support from the National Science Foundation with Grant No. NSF-DMR-2003117.

Funders	Funder number
National Quantum Information Science Research Centers
Quantum Science Center
National Science Foundation	NSF-DMR-2003117
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Division of Materials Sciences and Engineering

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title = "Spinon continuum in the Heisenberg quantum chain compound Sr2 V3 O9",

abstract = "Magnetic excitations in the spin chain candidate Sr2V3O9 have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandwidth of ∼22 meV is observed along the chain formed by alternating magnetic V4+ and nonmagnetic V5+ ions, which reveals the importance of the orbital degree of freedom in determining the chain axis as identified by prior electronic structure calculations. Incipient magnetic Bragg peaks due to weak ferromagnetic interchain couplings emerge when approaching the magnetic transition at TN∼5.3 K, while the excitations remain gapless within the instrumental resolution. Comparisons to the Bethe ansatz, density matrix renormalization group calculations, and effective field theories confirm Sr2V3O9 as a host of weakly coupled S=1/2 chains dominated by antiferromagnetic intrachain interactions of ∼7.1(1) meV.",

author = "Shang Gao and Lin, {Ling Fang} and Pontus Laurell and Qiang Chen and Qing Huang and Cruz, {Clarina dela} and Vemuru, {Krishnamurthy V.} and Lumsden, {Mark D.} and Nagler, {Stephen E.} and Gonzalo Alvarez and Elbio Dagotto and Haidong Zhou and Christianson, {Andrew D.} and Stone, {Matthew B.}",

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doi = "10.1103/PhysRevB.109.L020402",

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AU - Gao, Shang

AU - Lin, Ling Fang

AU - Laurell, Pontus

AU - Chen, Qiang

AU - Huang, Qing

AU - Cruz, Clarina dela

AU - Vemuru, Krishnamurthy V.

AU - Lumsden, Mark D.

AU - Nagler, Stephen E.

AU - Alvarez, Gonzalo

AU - Dagotto, Elbio

AU - Zhou, Haidong

AU - Christianson, Andrew D.

AU - Stone, Matthew B.

PY - 2024/1/1

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N2 - Magnetic excitations in the spin chain candidate Sr2V3O9 have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandwidth of ∼22 meV is observed along the chain formed by alternating magnetic V4+ and nonmagnetic V5+ ions, which reveals the importance of the orbital degree of freedom in determining the chain axis as identified by prior electronic structure calculations. Incipient magnetic Bragg peaks due to weak ferromagnetic interchain couplings emerge when approaching the magnetic transition at TN∼5.3 K, while the excitations remain gapless within the instrumental resolution. Comparisons to the Bethe ansatz, density matrix renormalization group calculations, and effective field theories confirm Sr2V3O9 as a host of weakly coupled S=1/2 chains dominated by antiferromagnetic intrachain interactions of ∼7.1(1) meV.

AB - Magnetic excitations in the spin chain candidate Sr2V3O9 have been investigated by inelastic neutron scattering on a single crystal sample. A spinon continuum with a bandwidth of ∼22 meV is observed along the chain formed by alternating magnetic V4+ and nonmagnetic V5+ ions, which reveals the importance of the orbital degree of freedom in determining the chain axis as identified by prior electronic structure calculations. Incipient magnetic Bragg peaks due to weak ferromagnetic interchain couplings emerge when approaching the magnetic transition at TN∼5.3 K, while the excitations remain gapless within the instrumental resolution. Comparisons to the Bethe ansatz, density matrix renormalization group calculations, and effective field theories confirm Sr2V3O9 as a host of weakly coupled S=1/2 chains dominated by antiferromagnetic intrachain interactions of ∼7.1(1) meV.

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Spinon continuum in the Heisenberg quantum chain compound Sr2 V3 O9

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