Superconducting Transition at 38 K in Insulating-Overdoped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>La</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Cu</mml:mi><mml:msub><mml:mi mathvariant="bold">O</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mtext mathvariant="normal">−</mml:mtext><mml:msub><mml:mi>La</mml:mi><mml:mn>1.64</mml:mn></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mn>0.36</mml:mn></mml:msub><mml:mi>Cu</mml:mi><mml:msub><mml:mi mathvariant="bold">O</

Smadici, S.; Lee, J. C. T.; Wang, S.; Abbamonte, Peter; Логвенов, Г.; Gozar, A.; Cavellin, C. Deville; Božović, I.

doi:10.1103/physrevlett.102.107004

Cited by 102 publications

(92 citation statements)

References 18 publications

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“…Charge transfer between the different unit cells allows superconductivity to be explained [82]. Exposed to an ozone atmosphere, T c is boosted to 50 K, a value that is not reached in single-phase films.…”

Section: High T C Heterostructuresmentioning

confidence: 99%

Interface superconductivity

Gariglio

Gabay

Mannhart

et al. 2015

Physica C: Superconductivity and its Applications

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Low dimensional superconducting systems have been the subject of numerous studies for many years. In this article, we focus our attention on interfacial superconductivity, a field that has been boosted by the discovery of superconductivity at the interface between the two band insulators LaAlO 3 and SrTiO 3 .We explore the properties of this amazing system that allows the electric field control and on/off switching of superconductivity. We discuss the similarities and differences between bulk doped SrTiO 3 and the interface system and the possible role of the interfacially induced Rashba type spin-orbit. We also, more briefly, discuss interface superconductivity in cuprates, in electrical double layer transistor field effect experiments, and the recent observation of a high T c in a monolayer of FeSe deposited on SrTiO 3 .

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Section: High T C Heterostructuresmentioning

confidence: 99%

Interface superconductivity

Gariglio

Gabay

Mannhart

et al. 2015

Physica C: Superconductivity and its Applications

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“…Further, the induced changes in the carrier concentration are limited to an extremely thin layer at the surface of the sample. The thickness of this active layer is determined by the Thomas-Fermi screening length, which along the c-axis in LSCO has been determined to be of 6 Å , 17 i.e., about the thickness of 0.5 UC (one molecular layer) of LSCO. Thus, essentially only the topmost CuO 2 layer can be significantly modified and the effect should vanish in the bulk.…”

Section: Resultsmentioning

confidence: 99%

“…1(a)). [15][16][17][18] Since the electrostatic screening length for cuprates is of the order of one unit cell, it is imperative that the deposited films are continuous and defect-free on the same length scale. The crystal structure of films was monitored in situ during growth by reflection high energy electron diffraction (RHEED) and after growth studied by x-ray diffraction.…”

Section: Methodsmentioning

confidence: 99%

Electric field effect on superconductivity in La2−xSrxCuO4

Dubuis

Bollinger

Pavuna

et al. 2012

Journal of Applied Physics

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We demonstrate a method to tune the carrier concentration of a high temperature superconductor over a wide range, using an applied electric field. Thin film devices were made in an electrical double layer transistor configuration utilizing an ionic liquid. In this way, the surface carrier density in La 2Àx Sr x CuO 4 films can be varied between 0.01 and 0.14 carriers per Cu atom with a resulting change in critical temperature of 25 K ($70% of the maximum critical temperature in this compound). This allows one to study a large segment of the cuprate phase diagram without altering the level of disorder. We used this method [A. T. Bollinger et al., Nature 472, 458-460 (2011)] to study the quantum critical point at the superconductor to insulator phase transition on the underdoped side of superconducting dome, and concluded that this transition is driven by quantum phase fluctuations and Cooper pair delocalization. V C 2012 American Institute of Physics.

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“…In 2003, it was shown by Bozovic et al [4] that no charge redistribution occurs between La 1.85 Sr 0.15 CuO 4 and La 2 CuO 4 . The measurement in M-I bilayers was performed by Smadici et al [5] using a novel synchrotron-based technique, resonant soft X-ray scattering. They measured a superlattice that consisted of 15 periods, each containing 1 UC of I and 2 UC of M. Again, none of the constituents were superconducting but the superlattice showed T c ≈ 38 K. The analysis of the data showed that the holes were not bound to the Sr 2+ ions; they redistributed between the layers, generating a carrier concentration of about 0.15 holes/Cu in the middle of La 2 CO 4 layers.…”

Section: Interface Superconductivitymentioning

confidence: 99%

Insights from the study of high-temperature interface superconductivity

Pereiro

Bollinger

Логвенов

et al. 2012

Phil. Trans. R. Soc. A.

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A brief overview is given of the studies of high-temperature interface superconductivity based on atomic-layer-by-layer molecular beam epitaxy (ALL-MBE). A number of difficult materials science and physics questions have been tackled, frequently at the expense of some technical tour de force, and sometimes even by introducing new techniques. ALL-MBE is especially suitable to address questions related to surface and interface physics. Using this technique, it has been demonstrated that high-temperature superconductivity can occur in a single copper oxide layer-the thinnest superconductor known. It has been shown that interface superconductivity in cuprates is a genuine electronic effect-it arises from charge transfer (electron depletion and accumulation) across the interface driven by the difference in chemical potentials rather than from cation diffusion and mixing. We have also understood the nature of the superconductorinsulator phase transition as a function of doping. However, a few important questions, such as the mechanism of interfacial enhancement of the critical temperature, are still outstanding.

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Superconducting Transition at 38 K in Insulating-OverdopedLa2CuO4−La1.64Sr0.36CuO

Cited by 102 publications

References 18 publications

Interface superconductivity

Interface superconductivity

Electric field effect on superconductivity in La2−xSrxCuO4

Insights from the study of high-temperature interface superconductivity

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