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Tohyama, Takami; Nagai, Susumu; Shibata, Yoshihiko; Maekawa, Sadamichi

doi:10.1103/physrevlett.82.4910

Cited by 67 publications

(72 citation statements)

References 24 publications

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“…This anomalous temperature dependence of the a configuration can be understood in the following way: At T /t=0, holes move along the charge stripe coherently and large Drude weight is obtained parallel to the stripe. 11 Spin correlation in the configuration a is thus suppressed in order to stabilize the coherent motion of holes. With increasing temperature, hole carriers enter into the spin domain, and thermally fluctuating spins in the stripe disturb the motion of holes along the stripe.…”

Section: Resultsmentioning

confidence: 99%

“…23 We set parameters J/t=0.4 (t ≃ 0.35 eV), and V /t=1 to obtain the ground state with charge stripes. 11 Here, we note that, if V = 0, the ground state in small clusters is not the stripe state but a uniform state as discussed by Hellberg and Manousakis 17 and the energy difference between the two states is of the order of J. 24 In order for the stripe phase to be in the ground state, it is necessary to introduce V with a magnitude of more than J.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

“…11 The magnitude of the stripe potential is assumed to depend on the number of holes n h in each column: V S (n h ) = 0 for n h =0 and 1 and V S (n h ) = −n h V for n h ≥2 with V > 0. V S (n h ) behaves like an attractive potential for holes independent of distance between holes.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

“…10 These features have been explained by the present authors, by using the exact diagonalization calculation at zero-temperature for a model that includes both the strong electron correlation and the stripes, i.e., a t-J model with an additional potential introduced to stabilize vertical charge stripes. 11 The ground state of the model is characterized by the charge stripes along which the charge carriers can move coherently, but perpendicular to which charge carriers show only incoherent motion. This situation is consistent with the behavior of the Hall coefficient at low temperature 12 as well as the ARPES data 13 in LNSC, both of which indicate the one-dimensional motion of the charge carriers.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Model and Numerical Methodsmentioning

confidence: 99%

Section: Model and Numerical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…The large Hubbard on-site repulsion U plays an important role. Strong correlation effects lead to two classes of charged stripe phases: either the constraint against double occupancy leads to magnetic order (magnetic charged stripes) or kinetic energy dominates, leading to a magnetically disordered phase (paramagnetic charged stripes), with correlations leading to reduced hopping, as in tJ 47 and slave boson 48 models. Section III will provide examples of both classes, denoted as Class B and Class A stripes, respectively.…”

Section: F What Stabilizes Charged Stripes?mentioning

confidence: 99%

Phase separation models for cuprate stripe arrays

Markiewicz

Kusko

2002

Phys. Rev. B

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An electronic phase separation model provides a natural explanation for a large variety of experimental results in the cuprates, including evidence for both stripes and larger domains, and a termination of the phase separation in the slightly overdoped regime, when the average hole density equals that on the charged stripes. Several models are presented for charged stripes, showing how density waves, superconductivity, and strong correlations compete with quantum size effects (QSEs) in narrow stripes. The energy bands associated with the charged stripes develop in the middle of the Mott gap, and the splitting of these bands can be understood by considering the QSE on a single ladder.

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