1993
DOI: 10.1209/0295-5075/21/9/013
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Competition Between Structural and Superconducting Transition in (LaNd)-Sr-Cu-O

Abstract: Experimental evidence is presented for a competition between the superconducting and a structural transition in La1,86 -Nd, Sro,15 CuOd as a function of the Nd content. At high Nd concentration (x 3 0.18) a discontinuous, fist-order structural transition is found, which destroys superconductivity and has a drastic influence on the normal-state transport properties.At lower Nd concentration (x < 0.18) a sharp superconducting transition occurs, which seems to suppress the structural phase transition.

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Cited by 57 publications
(24 citation statements)
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“…This breaking found in optimally and overly doped LSCO is consistent with previous results obtained by other techniques [17][18][19][20] suggesting competition between the structural phase transition and the superconductivity in LSCO and related compounds. Such a competition is also seen in other systems such as the A15 superconductors.…”
Section: A Soft Phononssupporting
confidence: 92%
“…This breaking found in optimally and overly doped LSCO is consistent with previous results obtained by other techniques [17][18][19][20] suggesting competition between the structural phase transition and the superconductivity in LSCO and related compounds. Such a competition is also seen in other systems such as the A15 superconductors.…”
Section: A Soft Phononssupporting
confidence: 92%
“…Taking the resolution into account, we estimate a typical domain size of ∼ 1000Å or greater. The LTT peak observed in this crystal is considerably sharper than those typically detected in powder samples, 2,4,31 where the LTT peak width is comparable to the LTO splitting. The broad peaks observed in powders raised concerns that the superconductivity which appears to survive in the LTT phase 20,21,22 might actually be associated with small LTO domains.…”
Section: Lto-to-ltt Transitionmentioning
confidence: 47%
“…In the case of stripe order, these materials exhibit stripe-like arrangements of alternating hole-rich and antiferromagnetic regions, where in all these materials an intimate interplay between structure, stripe order and superconductivity is present. More specifically, bulk superconductivity is suppressed in favor of static stripe order where the latter is stabilized through a particular tilting pattern of the CuO 6 octahedra in the lowtemperature tetragonal structural phase (LTT-phase) [23,38,47,52,53,54]. In the prototype stripe ordering compound La 2−x Ba x CuO 4 the LTT phase is only present in a limited doping range around x = 1/8 [55].…”
Section: Nernst Effect and Sdw Fluctuations In The Iron-based Supercomentioning
confidence: 99%