Synthesis and properties of superconducting<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>T</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mtext>−</mml:mtext><mml:msub><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>CuO</mml:mtext></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mtext>Pr</mm

Matsumoto, Osamu; Utsuki, Aya; Tsukada, A.; Yamamoto, Hideki; Manabe, Takaaki; Naito, Makio

doi:10.1103/physrevb.79.100508

Cited by 61 publications

(41 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results can provide natural explanations for recent experiments78910111213141516 in which the phase diagram of the electron-doped cuprates exhibits monotonically increasing T c toward zero doping (see Fig. 1(b)).…”

Section: Discussionsupporting

confidence: 78%

“…1(b)). This behavior has been observed in the carefully-annealed samples of both thin film and single crystal forms78910111213141516. If it is indeed the case, the implication can be profound and the electron-doped side of the phase diagram should be re-drawn (Fig.…”

Section: Discussionmentioning

confidence: 78%

“…According to a systematic re-investigation of electron-doped samples, RE 2 CuO 4 (RE = rare-earth: Nd, Pr, Sm, etc. ), the superconducting region does not cease to exist as the carrier concentration decreases, but this region extends to very low doping, quite close to zero56789101112131415161718. Further, as the doping approaches zero, the superconducting transition temperature ( T c ) seems to keep increasing with no indication of the dome (see Fig.…”

mentioning

confidence: 96%

See 2 more Smart Citations

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Jang

Sakakibara

Kino

et al. 2016

Sci Rep

View full text Add to dashboard Cite

Many important questions for high-Tc cuprates are closely related to the insulating nature of parent compounds. While there has been intensive discussion on this issue, all arguments rely strongly on, or are closely related to, the correlation strength of the materials. Clear understanding has been seriously hampered by the absence of a direct measure of this interaction, traditionally denoted by U. Here, we report a first-principles estimation of U for several different types of cuprates. The U values clearly increase as a function of the inverse bond distance between apical oxygen and copper. Our results show that the electron-doped cuprates are less correlated than their hole-doped counterparts, which supports the Slater picture rather than the Mott picture. Further, the U values significantly vary even among the hole-doped families. The correlation strengths of the Hg-cuprates are noticeably weaker than that of La2CuO4. Our results suggest that the strong correlation enough to induce Mott gap may not be a prerequisite for the high-Tc superconductivity.

show abstract

Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 78%

mentioning

confidence: 96%

See 1 more Smart Citation

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Jang

Sakakibara

Kino

et al. 2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Impressive performance using a nanoengineering approach has been obtained in SrTiO 3 multilayers with added Nb nanoparticles. 7 Thin films oxides, such as hexagonal Al-ZnO, 8 perovskite RE 2-x Ce x CuO 4 (RE214) 2,9 and RE-doped Sr 3 Ti 2 O 7 , 10 have already demonstrated excellent thermoelectric properties even without the addition of NPs. Other materials, such as transparent delafossite CuAlO 2 , 11 have the potential to be used as thermoelectrics.…”

Section: Introductionmentioning

confidence: 99%

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

et al. 2017

View full text Add to dashboard Cite

Because of pressing global environmental challenges, focus has been placed on materials for efficient energy use, and this has triggered the search for nanostructural modification methods to improve performance. Achieving a high density of tunable-sized second-phase nanoparticles while ensuring the matrix remains intact is a long-sought goal. In this paper, we present an effective, scalable method to achieve this goal using metal organic deposition in a perovskite system REBa 2 Cu 3 O 7 (rare earth (RE)) that enhances the superconducting properties to surpass that of previous achievements. We present two industrially compatible routes to tune the nanoparticle size by controlling diffusion during the nanoparticle formation stage by selecting the second-phase material and modulating the precursor composition spatially. Combining these routes leads to an extremely high density (8 × 10 22 m − 3 ) of small nanoparticles (7 nm) that increase critical currents and reduce detrimental effects of thermal fluctuations at all magnetic field strengths and temperatures. This method can be directly applied to other perovskite materials where nanoparticle addition is beneficial.

show abstract

“…3 Interestingly, the superconductivity was recently achieved in TЈ-R 2 CuO 4 thin films with T C substantially higher than in "electron-doped" analogs. 4 Nevertheless problems of electronic states and nature of particular physical and chemical properties of strongly correlated cuprates remain actively discussed.…”

Section: Introductionmentioning

confidence: 99%

Near-band gap electronic structure of the tetragonal rare-earth cupratesR2CuO4and the bismuth cuprateBi2
Pisarev
¹
,
Павлов
²
,
Kalashnikova
³

et al. 2010
Phys. Rev. B
27
0
11
0
View full text Add to dashboard Cite

Complex optical dielectric function in the tetragonal rare-earth cuprates R 2 CuO 4 ͑R = La, Pr, Nd, and Sm͒ and in the tetragonal bismuth cuprate Bi 2 CuO 4 is studied in the spectral range of 0.6-5.4 eV using a method of optical ellipsometry. The dielectric spectra are studied for the two main polarizations and analyzed in terms of a cluster model for CuO 4 6− complexes taking into account intracenter p-d and intercenter d-d charge-transfer ͑CT͒ transitions. The band gap in the rare-earth cuprates is defined by an electric-dipole-allowed CT transitions centered at 1.54-1.59 eV in Pr, Nd, and Sm cuprates, and 2.1 eV in La cuprate. Optical response of Bi 2 CuO 4 strongly differs from the rare-earth cuprates which we relate with strong covalency of Bi-O bonding and strong ionicity of Cu͑3d͒-O͑2p͒ bonding. These features are manifested in suppression of low-energy intense intracenter p-d and intercenter d-d CT transitions, and by appearance of strong intense absorption bands near 5 eV. Regardless the strong distinctions of optical response, on one hand, of La, Pr, Nd, and Sm cuprates, and on the other hand, of the Bi cuprate, the dielectric gap in these compounds shows comparable values defined by a superposition of intracenter p-d CT transitions and two-center d-d CT transitions. Thus these cuprates should be classified as compounds intermediate between CT and Mott-Hubbard insulators.

show abstract

Synthesis and properties of superconductingT′−R2CuO4(R=Pr

Cited by 61 publications

References 25 publications

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Near-band gap electronic structure of the tetragonal rare-earth cupratesR2CuO4and the bismuth cuprateBi2
Pisarev
¹
,
Павлов
²
,
Kalashnikova
³

et al. 2010
Phys. Rev. B
27
0
11
0
View full text Add to dashboard Cite

Contact Info

Product

Resources

About

Synthesis and properties of superconductingT′−R2CuO4(R=Pr

Cited by 61 publications

References 25 publications

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Direct theoretical evidence for weaker correlations in electron-doped and Hg-based hole-doped cuprates

Tuning nanoparticle size for enhanced functionality in perovskite thin films deposited by metal organic deposition

Near-band gap electronic structure of the tetragonal rare-earth cupratesR2CuO4and the bismuth cuprateBi2Pisarev1, Павлов2, Kalashnikova3 et al. 2010Phys. Rev. B270110View full textAdd to dashboardCite

Contact Info

Product

Resources

About

Near-band gap electronic structure of the tetragonal rare-earth cupratesR2CuO4and the bismuth cuprateBi2
Pisarev
¹
,
Павлов
²
,
Kalashnikova
³

et al. 2010
Phys. Rev. B
27
0
11
0
View full text Add to dashboard Cite