Selective epitaxial growth of submicron complex oxide structures by amorphous SrTiO3

Morales, P.; DiCiano, M.; Wei, J.Y.T.

doi:10.1063/1.1925781

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…The further study by Abdelhadi et al [9] revealed that this physical phenomenon was induced by the Phase Slip. The I V curves of the microbridge structures fabricated by Morales et al [10] show S figures, which is consistent with the superconductive phase slippage theory. By investigating into La 0.67 Ca 0.33 MnO 3 (LCMO) micro-bridges made with the same method, it was found that the metal-to-insulator temperature was depressed with the decrease of the width of the bridge.…”

supporting

confidence: 81%

The size effect on transport properties of colossal magnetoresistance materials La0.67Ca0.33MnO3

Lei

Guo

et al. 2008

Sci. China Ser. G-Phys. Mech. As

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High quality La 0.67 Ca 0.33 MnO 3 (LCMO) film was deposited via a novel pulsed electron deposition technique on SrTiO3(100) single crystal substrate. The micro-bridge with different widths was fabricated by using electron beam lithography (EBL) technique and their transport properties were studied. For the micro-bridges with width of 2 and 1.5 m, the insulator-to-metal transition temperature (T P ) keeps unchanged compared with the film. For the micro-bridges with width of 1 m, the T P shifts towards the lower temperature by 50 K. When the width decreases down to 500 nm, the insulator-to-metal transition disappears. The magnetoresistance behavior of these micro-bridges was studied, and the results show that the low field magnetoresistance (LFMR) decreases and the high field magnetoresistances (HFMR) keep almost unchanged as the width of micro-bridge is reduced. colossal magnetoresistance, pulsed electron deposition, electron beam lithography, electrical transport properties With the development of nanotechnology, the properties of materials on micro/nano scale attract more and more attention because many materials on such a scale show some different properties. Many new phenomena are anticipated to exhibit for further understanding of the underlying mechanism of the materials. Many multi-component oxides having interesting properties, such as superconductivity [1,2] , colossal magnetoresistivity (CMR) [3,4] and ferroelectricity, will play important roles in potential device applications of electronic devices, such as the high sensitive

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supporting

confidence: 81%

The size effect on transport properties of colossal magnetoresistance materials La0.67Ca0.33MnO3

Lei

Guo

et al. 2008

Sci. China Ser. G-Phys. Mech. As

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“…In general, any of the above scenarios may lead to local regions containing a weakened OP, with respect to phase fluctuations. In this connection, it is worth noting that such weakened regions could also be nucleation centers for phase-slip phenomena, which were seen in recent transport studies on superconducting YBCO microstrips 33,34 . It should also be remarked that our discussion of lowenergy Andreev states is not limited to only specular cases.…”

Section: Discussionmentioning

confidence: 99%

Suppression of low-energy Andreev states by a supercurrent inYBa2Cu3O7−δ

2005

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We report a coherence-length scale phenomenon related to how the high-Tc order parameter (OP) evolves under a directly-applied supercurrent. Scanning tunneling spectroscopy was performed on current-carrying YBa2Cu3O 7−δ thin-film strips at 4.2K. At current levels well below the theoretical depairing limit, the low-energy Andreev states are suppressed by the supercurrent, while the gap-like structures remain unchanged. We rule out the likelihood of various extrinsic effects, and propose instead a model based on phase fluctuations in the d -wave BTK formalism to explain the suppression. Our results suggest that a supercurrent could weaken the local phase coherence while preserving the pairing amplitude. Other possible scenarios which may cause the observed phenomenon are also discussed.

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“…SrTiO 3 films have also been used as template for the growth of submicron structures. Both amorphous [53] and porous [54] SrTiO 3 have been used to integrate nanostructures of YBCO in macroscale structures. These techniques have the advantage of reducing the structural damage, but present limited control over the position, dimensions and shape of the nanostructures.…”

Section: Ybco Nanowire Fabrication and Characterizationmentioning

confidence: 99%

Transport and noise properties of YBCO nanowire based nanoSQUIDs

Trabaldo

Arpaia

Arzeo

et al. 2019

Supercond. Sci. Technol.

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The development of quantum limited magnetic flux sensors has recently gained a lot of attention for the possibility of detecting the magnetic moment of nanoscaled systems. Here, the ultimate goal is the observation of a single spin. Such sensors are of fundamental importance for applications, ranging from spintronics and spin-based quantum information processing, to fundamental studies of nano-magnetism in molecules and magnetic nanoclusters. A nano-scale superconducting quantum interference device (nanoSQUID) is indeed a promising candidate to reach this ambitious goal. Nanowires, fabricated of high critical temperature superconductors (HTS), have been shown to be a valid candidate for the realization of nanoSQUIDs. A crucial requirement to achieve the necessary flux sensitivity and spatial resolution, is a SQUID loop on the nanometer scale. Moreover, HTS nanowire-based SQUIDs in combination with large area pickup loops or flux transformers might become instrumental in magnetometer applications, such as magneto encephalography and low field magnetic resonance imaging, where low intrinsic magnetic field noise is required. In this review we will give a survey on the state of the art of YBa2Cu3O7−δ thin film nanowires and their implementation in low noise nanoSQUIDs and magnetometers.

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Selective epitaxial growth of submicron complex oxide structures by amorphous SrTiO3

Cited by 6 publications

References 36 publications

The size effect on transport properties of colossal magnetoresistance materials La0.67Ca0.33MnO3

The size effect on transport properties of colossal magnetoresistance materials La0.67Ca0.33MnO3

Suppression of low-energy Andreev states by a supercurrent inYBa2Cu3O7−δ

Transport and noise properties of YBCO nanowire based nanoSQUIDs

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