High-Tc Josephson junction : towards improvement of IcRN product and realization of phase qubits

Maeda, Akiko; Kitano, Haruhisa; Gomez, Luis B.; Kubo, T.; Ota, Koki; Ohashi, T.

doi:10.1088/1742-6596/43/1/280

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…Copyright (2000 Another field of possible application for intrinsic junctions will be their use in qubits. In particular, the phase qubits based on the current-biased junctions are promising since the experimental observation of the macroscopic quantum tunnelling (MQT) in intrinsic Josephson junctions (Inomata et al, 2005(Inomata et al, , 2007Maeda et al, 2006;Jin et al, 2006;Kashiwaya et al, 2008). In particular, the phase qubits based on the current-biased junctions are promising since the experimental observation of the macroscopic quantum tunnelling (MQT) in intrinsic Josephson junctions (Inomata et al, 2005(Inomata et al, , 2007Maeda et al, 2006;Jin et al, 2006;Kashiwaya et al, 2008).…”

Section: 28mentioning

confidence: 99%

High-T c Josephson junctions

Seidel

2011

High-Temperature Superconductors

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Section: 28mentioning

confidence: 99%

High-T c Josephson junctions

Seidel

2011

High-Temperature Superconductors

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“…The AB relationship has been verified experimentally for a number of conventional superconductors and the value of I C R N has become of critical importance in a number of superconducting electronic devices. For example, the operating speed of a single-flux-quantum (SFQ) device if found to be inversely proportional to I C R N (see for example [2]). …”

Section: Introductionmentioning

confidence: 99%

“…Surprisingly, after more than 20 years of active investigation, the relationship between I C R N and has not been established for the high temperature superconductor (HTS) cuprates [2]. What is often found, especially with in-plane (e.g., grain boundary) junctions, is that I C R N is significantly smaller than the AB result, typically less than 10% of [3].…”

Section: Introductionmentioning

confidence: 99%

The I C R N Value in Intrinsic Josephson Tunnel Junctions in Bi2Sr2CaCu2O8+δ (Bi2212) Mesas

Kurter

Özyüzer

Zasadzinski

et al. 2010

J Supercond Nov Magn

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The c-axis current-voltage I (V ) characteristics have been obtained on a set of mesas of varying height sculpted on Bi 2 Sr 2 CaCu 2 O 8 + δ (Bi2212) crystals intercalated with HgB 2 . The intercalation, along with the small number of junctions in the mesa, N = 6-30, minimizes the degree of self-heating, leading to a consistent Josephson critical current, I C , among junctions in the mesa. The Bi2212 crystals with a bulk T C = 74 K are overdoped and display negligible pseudogap effects allowing an accurate measure of the normal state resistance, R N . These properties make the mesas nearly ideal for the determination of the Josephson I C R N product. We find I C R N values consistently ∼30% of the quasiparticle gap parameter, /e, which was measured independently using a mechanical contact, break junction technique. The latter was necessitated by higher bias heating effects in the mesas which prevented direct measurements of the superconducting gap. These values are among the highest reported and may represent the maximum intrinsic value for I C R N . The results indicate that the c-axis transport is a mixture of coherent and incoherent tunneling.

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High-T_c Josephson junction : towards improvement of I_cR_N product and realization of phase qubits

Cited by 2 publications

References 17 publications

High-T c Josephson junctions

High-T c Josephson junctions

The I C R N Value in Intrinsic Josephson Tunnel Junctions in Bi2Sr2CaCu2O8+δ (Bi2212) Mesas

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