Unusually simple crystal structure of an Nd–Ce–Sr–Cu–O superconductor

Sawa, Hiroshi; Suzuki, Sotaro; Watanabe, Masaru; Akimitsu, Jun; Matsubara, Hideki; Watabe, Hiroyuki; Uchida, S.; Kokusho, Koichi; Asano, Hajime; Izumi, Fujio; Takayama‐Muromachi, E.

doi:10.1038/337347a0

Cited by 174 publications

(31 citation statements)

References 5 publications

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“…Otherwise, the T'-type structure emerges. Considering the square-pyramidal cuprate layers, it is not surprising that the hybrid T'-type phases become superconducting on hole doping, either by oxidation under high pressure of oxygen [257] or by a Sr substitution for the larger REs [258]. Electron doping is not success.full in this respect [256,259].…”

Section: Rere'(o)--cu(o) Systemsmentioning

confidence: 95%

Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Karen

Kjekshus

1997

Journal of Thermal Analysis

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Phase diagrams for cupratcs of alkaline earth and rare earth elements are presented, covering binary to quintenary oxides and including selected solid solution series with other elements. Elementary crystal chemical data are included for identification of the occurring phases. Chemical stability is discussed with respect to the high-temperature reactions with Lewis acids like CO2, protons, etc. Particularly the occurrence of oxide carbonates is consistently pointed out as one of the possible reasons for contradictory results in phase diagrams which comprise oxides with high basicity.

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Section: Rere'(o)--cu(o) Systemsmentioning

confidence: 95%

Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Karen

Kjekshus

1997

Journal of Thermal Analysis

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“…The existence of the ¹*-type structure, which was reported for the "rst time in the substituted neodymium cuprate Nd Sr Ce CuO (26), depends on the simultaneous ful"lment of the two geometrical conditions which act separately for the ¹ and ¹-types. These conditions merge into a new one,…”

Section: Peculiarity Of the Anisotropy In The T*-type Structurementioning

confidence: 96%

Structure and Bonding Anisotropy in Intergrowth Oxides: A Clue to the Manifestation of Bidimensionality in T-, T′-, and T*-Type Structures

Choisnet

1999

Journal of Solid State Chemistry

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“…To the best of the current a b [59] as disordered layers exist on both sides, below and above a CuO 2 plane in the single-layer compounds [60]. These values should be compared with T c opt = 98 K for HgBa 2 CuO 4 + δ (Hg1201) and T c opt ~ 90 K for Tl 2 Ba 2 CuO 6 + δ (Tl2201) where disorder is in the charge reservoir layers well separated from the CuO 2 plane.…”

Section: Disorder Effectmentioning

confidence: 98%

Copper Oxide Superconductors

Uchida

2014

High Temperature Superconductivity

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The copper oxides (cuprates) stand out in their high T c values, 135 K, and are only family that achieved T c exceeding 100 K. Thanks to the enormous research efforts over 28 years, understanding of the cuprates has remarkably advanced, though some important issues remain under hot debate. A consensus which has been achieved is that primarily repulsive electron-electron interactions lead to superconductivity with such high T c as well as to unconventional d-wave pairing. Superconductivity emerges upon doping into the Mott insulating CuO 2 planes. The temperature-doping phase diagram of the cuprates is extremely complex with several orders or incipient orders showing up. Among the known orders, the pseudogap order encompasses a wide doping-temperature region and appears to be home to the superconducting order and its fluctuation at very high temperatures. In contrast to these generic features, T c values of the cuprates are strongly material dependent. A few parameters, such as disorder and multilayer, have been identified that control the wide-spread T c . T c is actually enhanced in some cuprates by reducing disorder in the crystal, and there is a possibility of T c enhancement to 150 K or even higher by optimizing multilayer structure.

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Unusually simple crystal structure of an Nd–Ce–Sr–Cu–O superconductor

Cited by 174 publications

References 5 publications

Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Phase diagrams for the YBa2Cu3O7 family — ANNO 1996

Structure and Bonding Anisotropy in Intergrowth Oxides: A Clue to the Manifestation of Bidimensionality in T-, T′-, and T*-Type Structures

Copper Oxide Superconductors

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