Spin dynamics of edge-sharing spin chains in SrC a13 C u24 O41

Guochu Deng; Dehong Yu; Richard Mole; Ekaterina Pomjakushina; Kazimierz Conder; Michel Kenzelmann; Shin Ichiro Yano; Chin Wei Wang; Kirrily C. Rule; Jason S. Gardner; Huiqian Luo; Shiliang Li; Clemens Ulrich; Paolo Imperia; Wei Ren; Shixun Cao; Garry J. McIntyre

doi:10.1103/PhysRevB.98.184411

Spin dynamics of edge-sharing spin chains in SrC a13 C u24 O41

Guochu Deng, Dehong Yu, Richard Mole, Ekaterina Pomjakushina, Kazimierz Conder, Michel Kenzelmann, Shin Ichiro Yano, Chin Wei Wang, Kirrily C. Rule, Jason S. Gardner, Huiqian Luo, Shiliang Li, Clemens Ulrich, Paolo Imperia, Wei Ren, Shixun Cao, Garry J. McIntyre

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Abstract

The low-energy magnetic excitation from the highly Ca-doped quasi-one-dimensional magnet SrCa13Cu24O41 was studied in the magnetic ordered state by using inelastic neutron scattering. We observed the gapless spin-wave excitation, dispersive along the a and c axes but nondispersive along the b axis. Such excitations are attributed to the spin wave from the spin-chain sublattice. Model fitting to the experimental data gives the nearest-neighbor interaction Jc as 5.4 meV and the interchain interaction Ja=4.4meV. Jc is antiferromagnetic and its value is close to the nearest-neighbor interactions of the similar edge-sharing spin-chain systems such as CuGeO3. Comparing with the hole-doped spin chains in Sr14Cu24O41, which shows a spin gap due to spin dimers formed around Zhang-Rice singlets, the chains in SrCa13Cu24O41 show a gapless excitation in this paper. We ascribe such a change from gapped to gapless excitations to holes transferring away from the chain sublattice into the ladder sublattice upon Ca doping.

Original language	English
Article number	184411
Journal	Physical Review B
Volume	98
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.98.184411
State	Published - Nov 12 2018
Externally published	Yes

Funding

The authors thank ANSTO for the allocation of neutron beam time on SIKA and PELICAN (Grants No. P5715, No. P5214, and No. P4335). G.D. and H.L. acknowledge support from the National Natural Science Foundation of China (Grant No. 11674372). H.L. and S.L. are also supported by the National Key Research and Development Program of China (Grants No. 2017YFA0302903, No. 2017YFA0303103, and No. 2016YFA0300502), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB07020300), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2016004). W.R. and S.C. acknowledge support from the National Natural Science Foundation of China (Grants No. 11774217, No. 51372149, and No. 51672171) and the National Key Basic Research Program of China (Grant No. 2015CB921600).

Funders	Funder number
National Natural Science Foundation of China	11674372
Chinese Academy of Sciences	XDB07020300
Youth Innovation Promotion Association of the Chinese Academy of Sciences	11774217, 51372149, 51672171, 2016004
National Basic Research Program of China (973 Program)	2017YFA0303103, 2017YFA0302903, 2016YFA0300502, 2015CB921600

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@article{6db702505f49483caf61697a42709cdb,

title = "Spin dynamics of edge-sharing spin chains in SrC a13 C u24 O41",

abstract = "The low-energy magnetic excitation from the highly Ca-doped quasi-one-dimensional magnet SrCa13Cu24O41 was studied in the magnetic ordered state by using inelastic neutron scattering. We observed the gapless spin-wave excitation, dispersive along the a and c axes but nondispersive along the b axis. Such excitations are attributed to the spin wave from the spin-chain sublattice. Model fitting to the experimental data gives the nearest-neighbor interaction Jc as 5.4 meV and the interchain interaction Ja=4.4meV. Jc is antiferromagnetic and its value is close to the nearest-neighbor interactions of the similar edge-sharing spin-chain systems such as CuGeO3. Comparing with the hole-doped spin chains in Sr14Cu24O41, which shows a spin gap due to spin dimers formed around Zhang-Rice singlets, the chains in SrCa13Cu24O41 show a gapless excitation in this paper. We ascribe such a change from gapped to gapless excitations to holes transferring away from the chain sublattice into the ladder sublattice upon Ca doping.",

author = "Guochu Deng and Dehong Yu and Richard Mole and Ekaterina Pomjakushina and Kazimierz Conder and Michel Kenzelmann and Yano, {Shin Ichiro} and Wang, {Chin Wei} and Rule, {Kirrily C.} and Gardner, {Jason S.} and Huiqian Luo and Shiliang Li and Clemens Ulrich and Paolo Imperia and Wei Ren and Shixun Cao and McIntyre, {Garry J.}",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = nov,

day = "12",

doi = "10.1103/PhysRevB.98.184411",

language = "English",

volume = "98",

journal = "Physical Review B",

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T1 - Spin dynamics of edge-sharing spin chains in SrC a13 C u24 O41

AU - Deng, Guochu

AU - Yu, Dehong

AU - Mole, Richard

AU - Pomjakushina, Ekaterina

AU - Conder, Kazimierz

AU - Kenzelmann, Michel

AU - Yano, Shin Ichiro

AU - Wang, Chin Wei

AU - Rule, Kirrily C.

AU - Gardner, Jason S.

AU - Luo, Huiqian

AU - Li, Shiliang

AU - Ulrich, Clemens

AU - Imperia, Paolo

AU - Ren, Wei

AU - Cao, Shixun

AU - McIntyre, Garry J.

PY - 2018/11/12

Y1 - 2018/11/12

N2 - The low-energy magnetic excitation from the highly Ca-doped quasi-one-dimensional magnet SrCa13Cu24O41 was studied in the magnetic ordered state by using inelastic neutron scattering. We observed the gapless spin-wave excitation, dispersive along the a and c axes but nondispersive along the b axis. Such excitations are attributed to the spin wave from the spin-chain sublattice. Model fitting to the experimental data gives the nearest-neighbor interaction Jc as 5.4 meV and the interchain interaction Ja=4.4meV. Jc is antiferromagnetic and its value is close to the nearest-neighbor interactions of the similar edge-sharing spin-chain systems such as CuGeO3. Comparing with the hole-doped spin chains in Sr14Cu24O41, which shows a spin gap due to spin dimers formed around Zhang-Rice singlets, the chains in SrCa13Cu24O41 show a gapless excitation in this paper. We ascribe such a change from gapped to gapless excitations to holes transferring away from the chain sublattice into the ladder sublattice upon Ca doping.

AB - The low-energy magnetic excitation from the highly Ca-doped quasi-one-dimensional magnet SrCa13Cu24O41 was studied in the magnetic ordered state by using inelastic neutron scattering. We observed the gapless spin-wave excitation, dispersive along the a and c axes but nondispersive along the b axis. Such excitations are attributed to the spin wave from the spin-chain sublattice. Model fitting to the experimental data gives the nearest-neighbor interaction Jc as 5.4 meV and the interchain interaction Ja=4.4meV. Jc is antiferromagnetic and its value is close to the nearest-neighbor interactions of the similar edge-sharing spin-chain systems such as CuGeO3. Comparing with the hole-doped spin chains in Sr14Cu24O41, which shows a spin gap due to spin dimers formed around Zhang-Rice singlets, the chains in SrCa13Cu24O41 show a gapless excitation in this paper. We ascribe such a change from gapped to gapless excitations to holes transferring away from the chain sublattice into the ladder sublattice upon Ca doping.

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Spin dynamics of edge-sharing spin chains in SrC a13 C u24 O41

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