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Thurber, Kent R.; Imai, Takashi; Saitoh, Takashi; Azuma, Masaki; Takano, Mikio; Chou, F. C.

doi:10.1103/physrevlett.84.558

Cited by 14 publications

(10 citation statements)

References 37 publications

(81 reference statements)

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“…In the present case of La 1.885 Sr 0.115 CuO 4 , the observed magnitude of 1/T 2G = 5.8 × 10 4 (s −1 ) at 35 K is indeed comparable to 1/T 2G ∼ 7 × 10 4 (s −1 ) observed for paramagnetic La 2 CuO 4 at 450 K with ξ/a ∼ 20 [30,31]. We can also qualitatively account for the observed temperature dependence below T charge using an analogous framework based on the anisotropic non-linear sigma model with the effective spin stiffness 2π ρ s [58] , 1/T 2G ∝ exp(2π ρ s /k B T ) [60]; the best fit shown by a dotted curve in Fig. 10 resulted in 2π ρ s /k B 40 K.…”

Section: T1supporting

confidence: 67%

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
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The presence of charge and spin stripe order in the La2CuO4-based family of superconductors continues to lead to new insight on the unusual ground state properties of high Tc cuprates. Soon after the discovery of charge stripe order at T charge 65 K in Nd 3+ co-doped La1.48Nd0.4Sr0.12CuO4 (Tc 6 K) [Tranquada et al., Nature 375 (1995) 561], Hunt, Singer et al. demonstrated that La1.48Nd0.4Sr0.12CuO4 and superconducting La2−xSrxCuO4 with x ∼ 1/8 (Tc 30 K) share nearly identical NMR anomalies near T charge of the former [Phys. Rev. Lett. 82 (1999) 4300]. Their inevitable conclusion that La1.885Sr0.115CuO4 also undergoes charge order at a comparable temperature became controversial, because diffraction measurements at the time were unable to detect Bragg peaks associated with charge order. Recent advances in x-ray diffraction techniques finally led to definitive confirmations of the charge order Bragg peaks in La1.885Sr0.115CuO4 with an onset at as high as T charge 80 K. Meanwhile, improved instrumental technology has enabled routine NMR measurements that were not feasible two decades ago. Motivated by these new developments, we revisit the charge order transition of a La1.885Sr0.115CuO4 single crystal based on 63 Cu NMR techniques. We demonstrate that 63 Cu NMR properties of the nuclear spin Iz = − 1 2 to + 1 2 central transition below T charge exhibit unprecedentedly strong dependence on the measurement time scale set by the separation time τ between the 90 • and 180 • radio frequency pulses; a new kind of anomalous, very broad wing-like 63 Cu NMR signals gradually emerge below T charge only for extremely short τ 4 µs, while the spectral weight I N ormal of the normal NMR signals is progressively wiped out. The NMR linewidth and relaxation rates depend strongly on τ below T charge , and their enhancement in the charge ordered state indicates that charge order turns on strong but inhomogeneous growth of Cu spin-spin correlations. I.arXiv:1712.07777v1 [cond-mat.supr-con]

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Section: T1supporting

confidence: 67%

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
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8
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0
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“…The roughly constant value of 1/T 1 (2) reflects the cancellation of the two temperature dependent parts of eq.2. 1/T 1 ∝ T which offsets the ∼ 1/T increase of the q-integral of the staggered spin susceptibility χ ′′ (q = ± π a , ω n ) down to 10 K, as previously reported by Takigawa et al [10] and Thurber et al [16] based on 63 Cu NMR. We note that the mild increase of 1/T 1 (2) down to 10 K is consistent with the logarithmic correction intrinsic to 1D behavior [10].…”

supporting

confidence: 54%

O17NMR Study ofq=0Spin Excitations in a

et al. 2001

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We used17 O NMR to probe the uniform (wavevector q = 0) electron spin excitations up to 800 K in Sr2CuO3 and separate the q = 0 from the q = ± π a staggered components. Our results support the logarithmic decrease of the uniform spin susceptibility below T ∼ 0.015J, where J = 2200 K. From measurement of the dynamical spin susceptibility for q = 0 by the spin-lattice relaxation rate 1/T1, we demonstrate that the q = 0 mode of spin transport is ballistic at the T = 0 limit, but has a diffusion-like contribution at finite temperatures even for T ≪ J. 75.40.Gb, 76.60.EsThe one-dimensional Heisenberg spin chain has one of the simplest Hamiltonians, H = J i S i · S i+1 , yet our understanding of its fascinating quantum mechanical properties is still developing with recent theoretical [1][2][3][4][5][6][7][8] and experimental [9][10][11][12] studies. A recent breakthrough in experimental studies of spin chains is the identification of a nearly ideal 1D S = 1 2 Heisenberg antiferromagnet, Sr 2 CuO 3 , by Motoyama et al. [9] In this system, S = 1 2 spins reside at Cu sites, and the superexchange interaction J is mediated by hybridization with the 2p σ orbital of the in-chain O(1) site, see Fig.1(a). Based on the fit of the uniform spin susceptibility χSr 2 CuO 3 has proven to be an ideal material for the experimental studies of S = Heisenberg spin chain can be probed at unprecedently low scales of temperature and energy. The second major advantage of Sr 2 CuO 3 is that 63 Cu NMR is observable at the magnetic cation site, because the large J suppresses the nuclear relaxation rates. In a series of publications, Takigawa et al. reported detailed 63 Cu NMR investigations of the low energy spin excitations [10][11][12]. They successfully tested the theoretical predictions for the q = ± π a staggered mode in the scaling limit [2], including the low temperature logarithmic corrections to the staggered dynamical susceptibility [4]. The third major advantage of Sr 2 CuO 3 , although it has never been exploited in the earlier NMR works, is the high local symmetry of the crystal structure. The Cu-O-Cu chain is strictly straight and the in-chain O(1) site is located in the middle of adjacent Cu sites as shown in Fig.1(a). Therefore the staggered components of the magnetic hyperfine fields from Cu electron spins are canceled out at the in-chain O(1) sites. Accordingly, one can probe the low energy spin excitations for the q = 0 long wavelength mode (see Fig.1(c) 17 O NMR studies have been reported despite the rich information expected for the unexplored q = 0 mode.In this Letter, we report the first successful 17 O NMR investigation of Sr 2 CuO 3 single crystals. We accurately measured the temperature dependence of the uniform spin susceptibility χ ′ (q = 0) by NMR Knight shift at the in-chain O(1) site without suffering from the contribution by free-spins that limits the accuracy of bulk susceptibility measurements and 63 Cu NMR at low temperatures. We found that χ ′ (q = 0) decreases steeply below T ∼ 0.015J without the signature ...

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“…[10][11][12] An isolated three-legged ladder should be a gapless singlet spin liquid in the ground state theoretically, 12,13) but experimentally Sr 2 Cu 3 O 5 becomes antiferromagnetically ordered at T N $ 52 K owing to tiny (CuO 4 ) 6À faceto-(CuO 4 ) 6À face inter-ladder interactions. 11,14) The infinite layer phase, SrCuO 2 , has a high T N of $450 K, 7,15) also owing to similar (CuO 4 ) 6À face-to-(CuO 4 ) 6À face intersquare lattice interactions.…”

mentioning

confidence: 99%

⁵⁷Fe Mössbauer Spectroscopic Study on Fe²⁺-Oxides with Infinite-Layer and Ladder Structures

et al. 2010

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On the basis of Mössbauer spectroscopy, we studied the magnetic properties of a pair of square-planar coordinated Fe 2þ (S ¼ 2)-oxides, SrFeO 2 (112) and Sr 3 Fe 2 O 5 (325). The infinite layered structure for the 112 phase and the two-legged ladder structure for the 325 phase are suggestive of magnetic low dimensionality but, in fact, both these oxides have been found to have high Néel temperatures of T N ¼ 468 K (112) and 296 K (325). Significantly strong FeO 4 face-to-FeO 4 face interactions between the layers (112) and between the ladders (325) have thus been suggested. The intrinsic isomer shift, a Mössbauer spectroscopic parameter measuring the s electron density at the 57 Fe nucleus, was estimated to be so small as $0:7 mm s À1 for both 112 and 325, indicating the specificity of the square planer coordination. Strontium ions are omitted. Magnetic moments lie in the a-plane for SrFeO 2 , and along the c-axis for Sr 3 Fe 2 O 5 .

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C63uNQR Evidence of Dimensional Crossover to Anisotropic 2D Regime inS=

Cited by 14 publications

References 37 publications

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
Self Cite
18
8
32
0
View full text Add to dashboard Cite

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
Self Cite
18
8
32
0
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O17NMR Study ofq=0Spin Excitations in a

⁵⁷Fe Mössbauer Spectroscopic Study on Fe²⁺-Oxides with Infinite-Layer and Ladder Structures

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C63uNQR Evidence of Dimensional Crossover to Anisotropic 2D Regime inS=

Cited by 14 publications

References 37 publications

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115Imai1, Takahashi2, Arsenault3 et al. 2017Phys. Rev. BSelf Cite188320View full textAdd to dashboardCite

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115Imai1, Takahashi2, Arsenault3 et al. 2017Phys. Rev. BSelf Cite188320View full textAdd to dashboardCite

O17NMR Study ofq=0Spin Excitations in a

57Fe Mössbauer Spectroscopic Study on Fe2+-Oxides with Infinite-Layer and Ladder Structures

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Product

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About

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
Self Cite
18
8
32
0
View full text Add to dashboard Cite

Revisiting Cu63 NMR evidence for charge order in superconducting La1.885Sr0.115
Imai
¹
,
Takahashi
²
,
Arsenault
³

et al. 2017
Phys. Rev. B
Self Cite
18
8
32
0
View full text Add to dashboard Cite

⁵⁷Fe Mössbauer Spectroscopic Study on Fe²⁺-Oxides with Infinite-Layer and Ladder Structures