Theory of Quasiparticles in the Underdoped High-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Superconducting State

Wen, Xiao-Gang; Lee, Patrick A.

doi:10.1103/physrevlett.80.2193

Cited by 112 publications

(89 citation statements)

References 13 publications

(23 reference statements)

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“…[21] The rate of change of n(q) could support this view but we found out that it also gets very reduced close to (0, π) and (π, 0) even in the non-interacting case when it is known that there is a continuous FS. Thus, the present results do not allow us to decide one way or the other.…”

Section: B Fermi Surfacesupporting

confidence: 50%

Spin and charge fluctuations in theU−t−t′model

Buhler

Moreo

1999

Phys. Rev. B

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As additional neutron scattering experiments are performed on a variety of high temperature superconducting compounds it appears that magnetic incommensuration is a phenomenon common to all of the samples studied. The newest experimental results indicate that incommensurate peaks exist at momentum q = π(1, 1 ± δ) and π(1 ± δ, 1) in La2−xSrxCuO4 (LSCO) and YBa2Cu3O 7−δ (YBCO). The dependence of δ with hole doping appears to be similar in both materials. In addition, new ARPES data for LSCO as a function of doping show that its Fermi surface is qualitatively similar to the one of YBCO, contrary to what was previously believed. Early theoretical attempts to explain LSCO and YBCO behavior usually relied on one-or three-band Hubbard models or the t-J model with electron hopping beyond nearest-neighbor and with different parameter values for each material. In this paper it is shown that using a one band Hubbard U-t-t ′ model with a unique set of parameters, U/t=6 and t ′ /t=-0.25, good agreement is obtained between computational calculations and neutron scattering and ARPES experiments for LSCO and YBCO. It is also shown that using a more negative t ′ /t will induce short-range magnetic incommensuration along the diagonal direction in the Brillouin zone, in qualitative disagreement with the experimental results. At the finite temperatures of the present Monte Carlo simulation it is also observed that in this model the tendency to incommensuration appears to be more related to the shape of the two-dimensional Fermi surface and the strength of the interaction, rather than to charge order.

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Section: B Fermi Surfacesupporting

confidence: 50%

Spin and charge fluctuations in theU−t−t′model

Buhler

Moreo

1999

Phys. Rev. B

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“…At low temperature (as low as T = 1K [291]), the superfluid density is a linearly decreasing function of temperature [9]. While this linear behavior is generally believed to be the result of amplitude fluctuations of an order parameter with nodes, it is difficult [148,151,292,293] from this perspective to understand why the slope is nearly independent of x and of ∆ 0 /T c . This feature of the data is naturally explained if it is assumed that the linear temperature dependence, too, arises from classical phase fluctuations, but then it is hard to understand [274] why quantum effects would not quench these fluctuations at such low temperatures.…”

Section: Applicability To the Cupratesmentioning

confidence: 99%

Concepts in High Temperature Superconductivity

Carlson

Kivelson

Orgad

et al. 2004

The Physics of Superconductors

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PrefaceIt is the purpose of this paper to explore the theory of high temperature superconductivity. Much of the motivation for this comes from the study of cuprate high temperature superconductors. However, we do not focus in great detail on the remarkable and exciting physics that has been discovered in these materials. Rather, we focus on the core theoretical issues associated with the mechanism of high temperature superconductivity. Although our discussions of theoretical issues in a strongly correlated superconductor are intended to be self contained and pedagogically complete, our discussions of experiments in the cuprates are, unfortunately, considerably more truncated and impressionistic.Our primary focus is on physics at intermediate temperature scales of order T c (as well as the somewhat larger "pseudogap" temperature) and energies of order the gap maximum, ∆ 0 . Consequently (and reluctantly) we have omitted any detailed discussion of a number of fascinating topics in cuprate superconductivity, including the low energy physics associated with nodal quasiparticles, the properties of the vortex matter which results from the application of a magnetic field, the effects of disorder, and a host of material specific issues. This paper is long enough as it is!

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“…12͒. [25][26][27][28][29][30][31][32] This heterogeneous structure of the Fermi surface in the pseudogap regime can provide a possible reason why parts of quasiparticle and/or hole-pair states become inhomogeneous in the intense, pinned 4a ϫ 4a charge order state; the incoherent electronic states around the antinodes, where the pseudogap develops at T Ͼ T c , are easily modified by external perturbation caused by the randomness associated with pinning potential of the charge order.…”

Section: Pinned 4a ã 4a Charge Order and Inhomogeneous Gap Structurementioning

confidence: 99%

Scanning tunneling microscopy and spectroscopy study of4a×4aelectronic charge order and the inhomogeneous pairing gap in superconductingBi2
Hashimoto
¹
,
Momono
²
,
Oda
³

et al. 2006
Phys. Rev. B
37
1
32
0
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We performed scanning tunneling microscopy and scanning tunneling spectroscopy ͑STS͒ measurements on underdoped Bi2212 crystals with doping levels p ϳ 0.11, ϳ0.13, and ϳ0.14 to examine the nature of the nondispersive 4a ϫ 4a charge order in the superconducting state at T Ӷ T c . The charge order appears conspicuously within the pairing gap, and low doping tends to favor the charge order. We point out the possibility that the 4a ϫ 4a charge order will be dynamical in itself, and pinned down over regions with effective pinning centers. The pinned 4a ϫ 4a charge order is closely related to the spatially inhomogeneous pairing gap structure, which has often been reported in STS measurements on high-T c cuprates.

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Theory of Quasiparticles in the Underdoped High-TcSuperconducting State

Cited by 112 publications

References 13 publications

Spin and charge fluctuations in theU−t−t′model

Spin and charge fluctuations in theU−t−t′model

Concepts in High Temperature Superconductivity

Scanning tunneling microscopy and spectroscopy study of4a×4aelectronic charge order and the inhomogeneous pairing gap in superconductingBi2
Hashimoto
¹
,
Momono
²
,
Oda
³

et al. 2006
Phys. Rev. B
37
1
32
0
View full text Add to dashboard Cite

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Theory of Quasiparticles in the Underdoped High-TcSuperconducting State

Cited by 112 publications

References 13 publications

Spin and charge fluctuations in theU−t−t′model

Spin and charge fluctuations in theU−t−t′model

Concepts in High Temperature Superconductivity

Scanning tunneling microscopy and spectroscopy study of4a×4aelectronic charge order and the inhomogeneous pairing gap in superconductingBi2Hashimoto1, Momono2, Oda3 et al. 2006Phys. Rev. B371320View full textAdd to dashboardCite

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Product

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About

Scanning tunneling microscopy and spectroscopy study of4a×4aelectronic charge order and the inhomogeneous pairing gap in superconductingBi2
Hashimoto
¹
,
Momono
²
,
Oda
³

et al. 2006
Phys. Rev. B
37
1
32
0
View full text Add to dashboard Cite