Spatial correlation between the LDOS modulation and electronic inhomogeneity in Bi2Sr2-xLaxCuO6+δ

Kato, Takuya; Machida, T.; Kamijo, Y.; Miyashita, R; Sakata, Hideaki

doi:10.1088/1742-6596/150/5/052101

Cited by 6 publications

(8 citation statements)

References 12 publications

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“…Similar periodic patterns were observed in tunnel studies of Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO) [128,[155][156][157][158][159], Bi 2 Sr 2−x La x CuO 6+δ [117], and Bi 2−y Pb y Sr 2−z La z CuO 6+x [97]. In Bi 2 Sr 2−x La x CuO 6+δ the existence of checkerboard structures was also shown in combined STM-ARPES investigations [160].…”

Section: Cdw and Pseudogap Evidence In Cupratessupporting

confidence: 77%

“…By doing this we rely not only on direct observations of CDWs in the real r-space but also on the identification of mysterious pseudogaps (the energy gaps of a still ambiguous nature both below and above the critical temperature, T c ) often observed in high-T c ceramics [100,101,[106][107][108][109][110][111][112] with the CDW gaps. We emphasize that the observed coherent long-range phenomena occur against a non-homogeneous background of the intrinsically non-stoichiometric materials [113][114][115][116][117][118].…”

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confidence: 81%

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d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry

Ekino

Gabovich

et al. 2011

Symmetry

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A review of the theory describing the coexistence between d-wave superconductivity and s-wave charge-density-waves (CDWs) is presented. The CDW gapping is identified with pseudogapping observed in high-T c oxides. According to the cuprate specificity, the analysis is carried out for the two-dimensional geometry of the Fermi surface (FS). Phase diagrams on the σ 0 − α plane-here, σ 0 is the ratio between the energy gaps in the parent pure CDW and superconducting states, and the quantity 2α is connected with the degree of dielectric (CDW) FS gapping-were obtained for various possible configurations of the order parameters in the momentum space. Relevant tunnel and photoemission experimental data for high-T c oxides are compared with theoretical predictions. A brief review of the results obtained earlier for the coexistence between s-wave superconductivity and CDWs is also given.

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Section: Cdw and Pseudogap Evidence In Cupratessupporting

confidence: 77%

mentioning

confidence: 81%

d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry

Ekino

Gabovich

et al. 2011

Symmetry

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“…Photoemission studies reveal the 4a 0 × 4a 0 charge-ordered "checkerboard" state in Ca 2−x Na x CuO 2 Cl 2 [371], and tunnel measurements visualized the same kind of ordering in BSCCO [370]. Scanning tunnel microscopy (STM) measurements found CDWs in Bi 2 Sr 1.4 La 0.6 CuO 6+δ (T max c ≈ 29 K) with an incommensurate period and CDW wave vectors Q depending on oxygen doping degree [340]. The same method revealed nondispersive (energy-independent) checkerboard CDWs in Bi 2−y Pb y Sr 2−z La z CuO 6+x (T c ≈ 35 K for the optimally doped composition) [344].…”

Section: Cdws and Cdw-related Phenomena In Cupratesmentioning

confidence: 96%

“…In this section, we are going to show that two very important features are common to all high-T c families. Specifically, these are the intrinsic inhomogeneity of nonstoichiometric superconducting ceramic and single crystalline samples [334][335][336][337][338][339][340][341][342][343] and the persistence of CDWs [340,344,345] and other phenomena, which we also consider as CDW manifestations (dip-hump structures, DHS [339,[346][347][348], and pseudogaps below and above T c [349][350][351][352][353][354][355][356][357][358] in tunneling spectra and angle-resolved photoemission spectra, ARPES). [12,334,[359][360][361][362][363][364][365][366][367][368][369][370].…”

Section: Cdws and Cdw-related Phenomena In Cupratesmentioning

confidence: 99%

Competition of Superconductivity and Charge Density Waves in Cuprates: Recent Evidence and Interpretation

Gabovich

Войтенко

Ekino

et al. 2010

Advances in Condensed Matter Physics

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Explicit and implicit experimental evidence for charge density wave (CDW) presence in high-Tcsuperconducting oxides is analyzed. The theory of CDW superconductors is presented. It is shown that the observed pseudogaps and dip-hump structures in tunnel and photoemission spectra are manifestations of the same CDW gapping of the quasiparticle density of states. Huge pseudogaps are transformed into modest dip-hump structures at low temperatures,T, when the electron spectrum superconducting gapping dominates. Heat capacity jumps at the superconducting critical temperature and the paramagnetic limit are calculated for CDW superconductors. For a certain range of parameters, the CDW state in ad-wave superconductor becomes reentrant withT, the main control quantity being a portion of dielectrcally gapped Fermi surface. It is shown that in the weak-coupling approximation, the ratio between the superconducting gap at zero temperatureΔ(T=0)andTchas the Bardeen-Cooper-Schrieffer value fors-wave Cooper pairing and exceeds the corresponding value ford-wave pairing of CDW superconductors. Thus, large experimentally found values2Δ(T=0)/Tc≈5÷8are easily reproduced with reasonable input parameter values of the model. The conclusion is made that CDWs play a significant role in cuprate superconductivity.

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“…show CDWs in Bi 2 Sr 1.4 La 0.6 CuO 6+δ [40] with an incommensurate period and CDW wave vectors Q depend on oxygen doping level. Similarly, nondispersive (energy-independent)…”

Section: Introductionmentioning

confidence: 96%

The Role of Nanoscale Atomic Fluctuations in the Superconducting Mechanism of the BiS2 Superconductors

Athauda

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Spatial correlation between the LDOS modulation and electronic inhomogeneity in Bi₂Sr_2-xLa_xCuO_6+δ

Cited by 6 publications

References 12 publications

d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry

d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry

Competition of Superconductivity and Charge Density Waves in Cuprates: Recent Evidence and Interpretation

The Role of Nanoscale Atomic Fluctuations in the Superconducting Mechanism of the BiS2 Superconductors

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