Phase Transition belowTcin La2-xSrxCuO4(x=0.12)Observed by138La-NQR

Goto, Takayuki; Nomoto, T.; Hanaguri, T.; Shinohara, T.; Sato, Takashi; Fukase, Tetsuo

doi:10.1143/jpsj.60.3581

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…[2][3][4] Around this carrier concentration, an incomplete phase transition from the low-temperature orthorhombic (LTO) phase to the LTT phase has been observed. [5][6][7][8] While clear evidence of the charge order has not been reported, it is considered that the electronic states in LSC are similar to those in the LNSC.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Shibata

Tohyama²,

Maekawa³

2001

Phys. Rev. B

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We examine the temperature dependence of the electronic states in the stripe phase of high-Tc cuprates by using the t-J model with a potential that stabilizes vertical charge stripes. Charge and spin-correlation functions and optical conductivity are calculated by using finite-temperature Lanczos method. At zero temperature, the antiferromagnetic correlation between a spin in a charge stripe and that in a spin domain adjacent to the stripe is weak, since the charge stripe and the spin domain are almost separated. With increasing temperature, the correlation increases and then decreases toward high temperature. This is in contrast to other correlations that decrease monotonically. From the examination of the charge dynamics, we find that this anomalous temperature dependence of the correlation is the consequence of a crossover from one-dimensional electronic states to two-dimensional ones.

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Section: Introductionmentioning

confidence: 99%

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Shibata

Tohyama²,

Maekawa³

2001

Phys. Rev. B

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“…This is consistent with the results of the ultrasonic experiments, where a narrow region of hysteresis was observed near the phase transition at the same temperature region as in figure 3. It was also reported that the nuclear spin lattice relaxation rate T 1 of 138 La-NQR in LSCO (x = 0.12) exhibits a diverging behaviour near the phase transition [12,20]. Now let us discuss the possible mechanism of the steplike decrease of thermal conductivity.…”

Section: Resultsmentioning

confidence: 90%

“…They also observed partial lattice stiffening and a small attenuation peak in LSCO (x = 0.10-0.12) at ∼10 K below T c . Furthermore, in LSCO (x = 0.12) Goto et al [12] found the nuclear spin-lattice relaxation rate T 1 of 138 La-NQR to exhibit a significant maximum at the temperature below ∼10 K. These results indicate that there exists some kind of phase transition below ∼10 K in LSCO. Interestingly, all the above phenomena, including the drop in thermal conductivity, occur at exactly the same temperature region.…”

Section: Resultsmentioning

confidence: 95%

“…The results indicate that there is no long-range ordered LTT phase existing in LSCO. On the other hand, the ultrasonic studies [11] and the nuclear spinlattice relaxation rate of 138 La in LSCO [12] show that there must be some kind of phase transition in LSCO in the lowtemperature region below T c . Thermal transport measurements on cuprates can give important information about the various scattering processes of electrons and phonons, and they are sensitive to structural phase transition.…”

Section: Introductionmentioning

confidence: 99%

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Anomalies in low-temperature thermal conductivity of underdoped La_2−xSr_xCuO₄single crystals

Zhao¹,

Chen²,

Zhou³

et al. 2005

Supercond. Sci. Technol.

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We have measured the thermal conductivity in the ab-plane (κ ab) as well as the c-axis (κ c) of a series of underdoped La 2−x Sr x CuO 4 (LSCO) single crystals grown by the travelling-solvent floating-zone (TSFZ) method. It was found that temperature dependence of thermal conductivity exhibits an interesting feature: there exists a steplike drop of thermal conductivity below ∼10 K in both κ ab (T) and κ c (T), and this drop in thermal conductivity occurs at lower temperature with lower Sr concentration. Furthermore, it is found that the magnitude of this drop at x = 0.11 and 0.125 is larger than at other doping levels. We suspect that this phenomenon is due to an LTO (low-temperature orthorhombic) to short-range (local) or dynamical LTT-like (low-temperature tetragonal) structure transition.

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NQRS Data for CuLa1.88O4Sr0.12 (Subst. No. 2086)

Chihara¹,

Nakamura²

2010

Substances Containing C10H16 … Zn

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Phase Transition belowT_cin La_2-xSr_xCuO₄(x=0.12)Observed by¹³⁸La-NQR

Cited by 12 publications

References 9 publications

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Anomalies in low-temperature thermal conductivity of underdoped La_2−xSr_xCuO₄single crystals

NQRS Data for CuLa1.88O4Sr0.12 (Subst. No. 2086)

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Phase Transition belowTcin La2-xSrxCuO4(x=0.12)Observed by138La-NQR

Cited by 12 publications

References 9 publications

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Temperature dependence of spin correlation and charge dynamics in the stripe phase of high-Tcsuperconductors

Anomalies in low-temperature thermal conductivity of underdoped La2−xSrxCuO4single crystals

NQRS Data for CuLa1.88O4Sr0.12 (Subst. No. 2086)

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Product

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Phase Transition belowT_cin La_2-xSr_xCuO₄(x=0.12)Observed by¹³⁸La-NQR

Anomalies in low-temperature thermal conductivity of underdoped La_2−xSr_xCuO₄single crystals