The incommensurate structure of (Sr14−xCax)Cu24O41 (0 &lt; x ∼ 8) a superconductor byproduct

McCarron, E.M.; Subramanian, M.A.; Calabrese, J. C.; Harlow, Richard L.

doi:10.1016/0025-5408(88)90124-9

Cited by 394 publications

(173 citation statements)

References 3 publications

Supporting

Mentioning

169

Contrasting

Unclassified

Order By: Relevance

“…7 In these subsystems, two quasi one-dimensional (1D) magnetic structures are realised which are oriented along the c-axis, i.e. S = 1 2 Cu 2 O 3 spin ladders and CuO 2 spin chains.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite

We report on magnetisation measurements of Sr14−xCaxCu24O41, with 0 ≤ x ≤ 12, in magnetic fields up to 16 T. The low temperature magnetic response of the CuO2 spin chains changes strongly upon doping. For x = 0, the ground state with nearly independent dimers is confirmed. Reduction of the number of holes in the chains through Ca-doping leads to an additional contribution to the magnetisation, which depends linearly on the magnetic field. Remarkably, the slope of this linear contribution increases with the Ca content. We argue that antiferromagnetic spin chains do not account for this behaviour but that the hole dynamics might be involved.

show abstract

“…7 In these subsystems, two quasi one-dimensional (1D) magnetic structures are realised which are oriented along the c-axis, i.e. S = 1 2 Cu 2 O 3 spin ladders and CuO 2 spin chains.…”

Section: Introductionmentioning

confidence: 99%

“…The Cu-O-Cu bonding angle amounts to ∢ ∼ 93 • . 7 For nearest neighbour spins, this results in a ferromagnetic (FM) superexchange. 11 The compounds Sr 14−x Ca x Cu 24 O 41 , however, are intrinsically hole doped with six holes per formula unit.…”

Section: Introductionmentioning

confidence: 99%

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite

show abstract

“…1a. 1,2 One is simple chains of copper ions which are coupled by the nearly 90 • Cu-O-Cu bonds. The other is two-leg ladders of copper ions, which are coupled by the nearly 180 • Cu-O-Cu bonds along the a and c axes.…”

Section: Introductionmentioning

confidence: 99%

Magnetic excitations and structural change in theS=12quasi-one-dimensional magnetSr14−x<

et al. 1997

View full text Add to dashboard Cite

Neutron scattering measurements have been performed on the S= 1 2 quasi-one-dimensional system Sr14−xYxCu24O41, which has both simple chains and two-leg ladders of copper ions. We observed that when a small amount of yttrium is substituted for strontium, which is expected to reduce the number of holes, the dimerized state and the structure in the chain are changed drastically. The inelastic peaks originating from the dimerized state of the chain becomes broader in energy but not in momentum space. This implies that the dimerized state becomes unstable but the spin correlations are unchanged with yttrium substitution. Furthermore, it was observed that nuclear Bragg peak intensities originating from the chain show strong temperature and x dependence, which suggests that the chains slide along the c axis as temperature and x are varied.

show abstract

“…In this Letter, we report a study of the two-leg quantum spin ladder Sr 14 Cu 24 O 41 [18,19] by means of momentumresolved high-resolution RIXS at the Cu L 3 edge. Given that Cu L 3 scattering experiments have been already shown to contain valuable information about the charge degrees of freedom [20], an outstanding question we would like to address here is: how can RIXS provide information on magnetic excitations from a quantum ground state.…”

mentioning

confidence: 99%

Collective Magnetic Excitations in the Spin LadderSr14Cu24O41Measured Using High-Resolution Resonant Inelastic X-Ray Scattering

et al. 2009

View full text Add to dashboard Cite

We investigate magnetic excitations in the spin-ladder compound Sr 14 Cu 24 O 41 using high-resolution Cu L 3 edge resonant inelastic x-ray scattering (RIXS). Our findings demonstrate that RIXS couples to two-triplon collective excitations. In contrast to inelastic neutron scattering, the RIXS cross section changes only moderately over the entire Brillouin zone, revealing high sensitivity also at small momentum transfers, allowing determination of the two-triplon energy gap as 100 AE 30 meV. Our results are backed by calculations within an effective Hubbard model for a finite-size cluster, and confirm that optical selection rules are obeyed for excitations from this spherically symmetric quantum spin-liquid ground state. DOI: 10.1103/PhysRevLett.103.047401 PACS numbers: 78.70.En, 71.10.Pm, 75.25.+z, 75.30.Ds Collective excitations in strongly correlated electron materials remain a pivotal challenge in contemporary solid state physics. It is widely debated whether magnetic excitations provide the pairing interaction in the hightemperature and unconventional superconductors [1,2]. From that perspective quantum spin systems attract considerable interest. While most such materials, e.g., the cuprate superconductors, exhibit enormous complexity, the two-leg spin ladder is easier to tract theoretically [3][4][5][6]. It consists of two parallel chains (legs) with a transverse (rung) exchange coupling. This system features a singlet ground state and dispersive triplet excitations (triplons), that both have quantum mechanical origin without any classical counterpart. To date, mainly two techniques have been established as momentum-and energy-resolved probes of the dispersion of collective excitations: angleresolved photoelectron spectroscopy and inelastic neutron scattering (INS) for charge and spin degrees of freedom, respectively [7,8]. Because of the latest instrumental improvements [9,10], the energy scale of magnetic exchange is becoming readily accessible for resonant inelastic x-ray scattering (RIXS) [11][12][13][14], which is promising to give information on both, spin and charge degrees of freedom, and in addition is an element-specific technique. Furthermore, RIXS requires only small sample volumes (<0:1 mm 3 ). Recent RIXS studies were performed on long-range ordered magnets with spin-wave excitations [15][16][17].In this Letter, we report a study of the two-leg quantum spin ladder Sr 14 Cu 24 O 41 [18,19] by means of momentumresolved high-resolution RIXS at the Cu L 3 edge. Given that Cu L 3 scattering experiments have been already shown to contain valuable information about the charge degrees of freedom [20], an outstanding question we would like to address here is: how can RIXS provide information on magnetic excitations from a quantum ground state. In the ladder system of Sr 14 Cu 24 O 41 no symmetry breaking occurs-neither in spin-nor in real-space-in contrast to, e.g., a magnetically ordered state, where both symmetries are broken and the direction of the ordered moments dictates the quantization axi...

show abstract

The incommensurate structure of (Sr14−xCax)Cu24O41 (0 < x ∼ 8) a superconductor byproduct

Cited by 394 publications

References 3 publications

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite

Magnetic excitations and structural change in theS=12quasi-one-dimensional magnetSr14−x<

Collective Magnetic Excitations in the Spin LadderSr14Cu24O41Measured Using High-Resolution Resonant Inelastic X-Ray Scattering

Contact Info

Product

Resources

About

The incommensurate structure of (Sr14−xCax)Cu24O41 (0 < x ∼ 8) a superconductor byproduct

Cited by 394 publications

References 3 publications

Magnetization of hole-dopedCuO2spin chains inSr14−xKlingeler1, Tristan2, Büchner3 et al. 2005Phys. Rev. B154121View full textAdd to dashboardCite

Magnetization of hole-dopedCuO2spin chains inSr14−xKlingeler1, Tristan2, Büchner3 et al. 2005Phys. Rev. B154121View full textAdd to dashboardCite

Magnetic excitations and structural change in theS=12quasi-one-dimensional magnetSr14−x<

Collective Magnetic Excitations in the Spin LadderSr14Cu24O41Measured Using High-Resolution Resonant Inelastic X-Ray Scattering

Contact Info

Product

Resources

About

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite

Magnetization of hole-dopedCuO2spin chains inSr14−x
Klingeler
¹
,
Tristan
²
,
Büchner
³

et al. 2005
Phys. Rev. B
15
4
12
1
View full text Add to dashboard Cite