<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">La</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi>−</mml:mi><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi></mml:mrow><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mi>y</mml:mi></mml:m

Sato, Hisashi; Tsukada, A.; Naito, Makio; Matsuda, Azusa

doi:10.1103/physrevb.61.12447

Cited by 133 publications

(106 citation statements)

References 36 publications

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“…The high conductivity of very thin films in comparison with a-b plane, single-crystal conductivity could be an effect of the film strain induced by the substrate, as already observed in isostructural La 2 CuO 4 phase, where superconducting properties are improved by the substrateinduced strain. 37 In La 2 CuO 4 -related compounds, the intrinsic local mismatch between the perovskite and rock-salt slabs forming the structure modulates the Cu-O distance and is responsible for the electronic doping state and, consequently, the superconducting properties. 38 In the case of epitaxial thin films of La 2 NiO 4 , both phenomena could thus also take place or coexist.…”

Section: P29mentioning

confidence: 99%

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

García

Burriel

Bonanos

et al. 2008

J. Electrochem. Soc.

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Epitaxial c-axis oriented La 2 NiO 4+␦ films were deposited onto SrTiO 3 and NdGaO 3 substrates by the pulsed injection metal organic chemical vapor deposition technique. Experimental conditions were optimized in order to accurately control the composition, thickness, and texture of the layers. X-ray diffraction was used to confirm the high crystalline quality of the obtained material. Electrical characterizations were performed on thin ͑50 nm͒ and thick ͑335 nm͒ layers. The total specific conductivity, which is predominantly electronic, was found to be larger for the thinner films measured ͑50 nm͒, probably due to the effect of the strain present in the layers. Those thin films ͑50 nm͒ showed values even larger than those observed for single crystals and, to our knowledge, are the largest conductivity values reported to date for the La 2 NiO 4+␦ material. The oxygen exchange kinetics was studied by the electrical conductivity relaxation technique, from which the surface exchange coefficient was determined.

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Section: P29mentioning

confidence: 99%

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

García

Burriel

Bonanos

et al. 2008

J. Electrochem. Soc.

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“…Dabrowski et al found the strong correlation between T c and the tilt angle of the CuO 6 octahedron or the amplitude of the corrugated lattice potential of CuO 2 planes [24]. Furthermore, in both thin films and pressure-applied 2-1-4 compounds with flat CuO 2 planes the disappearance of the 1/8-anomaly and the substantial increment of T c are reported [25][26][27][28]. Such interplay is easily interpreted through the stripe model or from viewpoint of the stability of CDW order.…”

mentioning

confidence: 99%

Competition between Charge- and Spin-Density-Wave Order and Superconductivity inLa1.875Ba0.125−x
Fujita
¹
,
Goka
²
,
Yamada
³

et al. 2002
Phys. Rev. Lett.
167
4
108
2
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We have performed a series of elastic neutron scattering measurements on 1/8-hole doped La1.875Ba0.125−xSrxCuO4 single crystals with x = 0.05, 0.06, 0.075 and 0.085. Both charge-densitywave (CDW) and spin-density-wave (SDW) orders are found to develop simultaneously below the structural transition temperature between the low-temperature orthorhombic (LTO) and lowtemperature tetragonal (LTT) or low-temperature less-orthorhombic (LTLO) phases. In the ground state the CDW order is observed only in the LTT/LTLO phase and drastically degrades towards the LTO boundary. The x-dependence of Tc strongly suggests a direct effect of the CDW order on the suppression of superconductivity. Results are discussed in comparison with those from the La1.6−xNd0.4SrxCuO4 system within the framework of the stripe model. PACS numbers: 74.72. Dn, 71.45.Lr, 75.30.Fv, 74.25.Dw The interplay between magnetism and superconductivity is a central issue in high-T c superconductivity [1]. Neutron scattering measurements on the superconducting La 2−x Sr x CuO 4 (LSCO) system have shown dynamical incommensurate (IC) magnetic correlation [2][3][4]. The linear doping dependence of incommensurability with the superconducting transition temperature (T c ) in the under-doped region suggests a relationship between magnetic correlation and superconductivity [5].On the other hand, it is well known that superconductivity in the La 2−x M x CuO 4 (M=Ba, Sr) system is anomalously suppressed at the specific hole concentration of x ∼1/8. For the La 2−x Ba x CuO 4 (LBCO) system, this 1/8-anomaly is accompanied by an occurrence of the lowtemperature tetragonal (LTT) phase with P4 2 /ncm symmetry [6][7][8]. Superconductivity in the low-temperature orthorhombic (LTO) phase of LSCO with Bmab symmetry is weakly suppressed in comparison with the LBCO system [9,10]. Maeno et al. initiated systematic studies on La 1.875 Ba 0.125−x Sr x CuO 4 (LBSCO) using polycrystalline samples to clarify the relation between T c and crystal structure [11]. We comprehensively studied the same system using single crystals and revealed a drastic change in x-dependence of T c [12,13]. In the present study we demonstrate a close relation between T c and crystal structure as shown in Fig.4.Recently, the IC spin-density-wave (SDW) and the charge-density-wave (CDW) orders were discovered in La 1.6−x Nd 0.4 Sr x CuO 4 (LNSCO) with x ∼ 1/8. These provide important clues for understanding the mechanism of the 1/8-anomaly based on the stripe model [14,15]. In the framework of the stripe model it is recognized that the orders are a manifestation of dynamical spin/charge correlation and that stabilization of the orders competitively induces instability of superconductivity [16]. In the LTT phase stripe-shaped orders parallel or perpendicular to Cu-O bonding are favorably stabilized by the corrugated pattern of the in-plane lattice potential. Hence, T c is suppressed to a greater extent in the LTT phase than in the LTO phase. Whether visible signs, such as the anomalous suppression of T c , app...

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“…Ultrathin films of La 1.85 Sr 0.15 CuO 4 were synthesized in a custom-designed ultrahigh-vacuum chamber (base pressure <10 -7 Pa) from metal sources by means of reactive co-evaporation [16,17,19].…”

Section: Fabricationmentioning

confidence: 99%

Photoresponse of a La_1.85Sr_0.15CuO₄nanostrip

Shibata

Kirigane

Fukao

et al. 2017

Supercond. Sci. Technol.

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La2−xSrxCuOy

Cited by 133 publications

References 36 publications

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

Competition between Charge- and Spin-Density-Wave Order and Superconductivity inLa1.875Ba0.125−x
Fujita
¹
,
Goka
²
,
Yamada
³

et al. 2002
Phys. Rev. Lett.
167
4
108
2
View full text Add to dashboard Cite

Photoresponse of a La_1.85Sr_0.15CuO₄nanostrip

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La2−xSrxCuOy

Cited by 133 publications

References 36 publications

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

Electrical Conductivity and Oxygen Exchange Kinetics of La[sub 2]NiO[sub 4+δ] Thin Films Grown by Chemical Vapor Deposition

Competition between Charge- and Spin-Density-Wave Order and Superconductivity inLa1.875Ba0.125−xFujita1, Goka2, Yamada3 et al. 2002Phys. Rev. Lett.16741082View full textAdd to dashboardCite

Photoresponse of a La1.85Sr0.15CuO4nanostrip

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Competition between Charge- and Spin-Density-Wave Order and Superconductivity inLa1.875Ba0.125−x
Fujita
¹
,
Goka
²
,
Yamada
³

et al. 2002
Phys. Rev. Lett.
167
4
108
2
View full text Add to dashboard Cite

Photoresponse of a La_1.85Sr_0.15CuO₄nanostrip