One- and two-triplon spectra of a cuprate ladder

S. Notbohm; P. Ribeiro; B. Lake; D. A. Tennant; K. P. Schmidt; G. S. Uhrig; C. Hess; R. Klingeler; G. Behr; B. Buechner; M. Reehuis; R. I. Bewley; C. D. Frost; P. Manuel; R. S. Eccleston

doi:10.1103/PhysRevLett.98.027403

One- and two-triplon spectra of a cuprate ladder

S. Notbohm, P. Ribeiro, B. Lake, D. A. Tennant, K. P. Schmidt, G. S. Uhrig, C. Hess, R. Klingeler, G. Behr, B. Buechner, M. Reehuis, R. I. Bewley, C. D. Frost, P. Manuel, R. S. Eccleston

School of Physics and Astronomy

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

105 Citations (Scopus)

Abstract

We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41 as a starting point for investigating doped ladders and their tendency toward superconductivity. A key feature was the separation of one-triplon and two-triplon scattering. Two-triplon scattering is observed quantitatively for the first time and so access is realized to the important strong magnetic quantum fluctuations. The spin gap is found to be 26.4 +/- 0.3 meV. The data are successfully modeled using the continuous unitary transformation method, and the exchange constants are determined by fitting to be J(leg) = 186 meV and J(rung) = 124 meV along the leg and rung, respectively; a substantial cyclic exchange of J(cyc) = 31 meV is confirmed.

Original language	English
Number of pages	4
Journal	Physical Review Letters
Volume	98
DOIs	https://doi.org/10.1103/PhysRevLett.98.027403
Publication status	Published - 12 Jan 2007

Keywords

MAGNETIC EXCITATIONS
2-LEG LADDERS
SPIN GAPS
SUPERCONDUCTIVITY

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10.1103/PhysRevLett.98.027403

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@article{c0074e3d01614664a996b9382092c399,

title = "One- and two-triplon spectra of a cuprate ladder",

abstract = "We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41 as a starting point for investigating doped ladders and their tendency toward superconductivity. A key feature was the separation of one-triplon and two-triplon scattering. Two-triplon scattering is observed quantitatively for the first time and so access is realized to the important strong magnetic quantum fluctuations. The spin gap is found to be 26.4 +/- 0.3 meV. The data are successfully modeled using the continuous unitary transformation method, and the exchange constants are determined by fitting to be J(leg) = 186 meV and J(rung) = 124 meV along the leg and rung, respectively; a substantial cyclic exchange of J(cyc) = 31 meV is confirmed.",

keywords = "MAGNETIC EXCITATIONS, 2-LEG LADDERS, SPIN GAPS, SUPERCONDUCTIVITY",

author = "S. Notbohm and P. Ribeiro and B. Lake and Tennant, {D. A.} and Schmidt, {K. P.} and Uhrig, {G. S.} and C. Hess and R. Klingeler and G. Behr and B. Buechner and M. Reehuis and Bewley, {R. I.} and Frost, {C. D.} and P. Manuel and Eccleston, {R. S.}",

year = "2007",

month = jan,

day = "12",

doi = "10.1103/PhysRevLett.98.027403",

language = "English",

volume = "98",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - One- and two-triplon spectra of a cuprate ladder

AU - Notbohm, S.

AU - Ribeiro, P.

AU - Lake, B.

AU - Tennant, D. A.

AU - Schmidt, K. P.

AU - Uhrig, G. S.

AU - Hess, C.

AU - Klingeler, R.

AU - Behr, G.

AU - Buechner, B.

AU - Reehuis, M.

AU - Bewley, R. I.

AU - Frost, C. D.

AU - Manuel, P.

AU - Eccleston, R. S.

PY - 2007/1/12

Y1 - 2007/1/12

N2 - We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41 as a starting point for investigating doped ladders and their tendency toward superconductivity. A key feature was the separation of one-triplon and two-triplon scattering. Two-triplon scattering is observed quantitatively for the first time and so access is realized to the important strong magnetic quantum fluctuations. The spin gap is found to be 26.4 +/- 0.3 meV. The data are successfully modeled using the continuous unitary transformation method, and the exchange constants are determined by fitting to be J(leg) = 186 meV and J(rung) = 124 meV along the leg and rung, respectively; a substantial cyclic exchange of J(cyc) = 31 meV is confirmed.

AB - We have performed inelastic neutron scattering on the near ideal spin-ladder compound La4Sr10Cu24O41 as a starting point for investigating doped ladders and their tendency toward superconductivity. A key feature was the separation of one-triplon and two-triplon scattering. Two-triplon scattering is observed quantitatively for the first time and so access is realized to the important strong magnetic quantum fluctuations. The spin gap is found to be 26.4 +/- 0.3 meV. The data are successfully modeled using the continuous unitary transformation method, and the exchange constants are determined by fitting to be J(leg) = 186 meV and J(rung) = 124 meV along the leg and rung, respectively; a substantial cyclic exchange of J(cyc) = 31 meV is confirmed.

KW - MAGNETIC EXCITATIONS

KW - 2-LEG LADDERS

KW - SPIN GAPS

KW - SUPERCONDUCTIVITY

U2 - 10.1103/PhysRevLett.98.027403

DO - 10.1103/PhysRevLett.98.027403

M3 - Article

SN - 0031-9007

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

ER -

One- and two-triplon spectra of a cuprate ladder

Abstract

Keywords

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