Nonlinear current-voltage characteristics of three-dimensional Josephson-junction arrays with anisotropic interactions

Sugano, Ryoko; Onogi, T.; Murayama, Yoshimasa

doi:10.1103/physrevb.48.13784

Cited by 16 publications

(8 citation statements)

References 21 publications

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“…24,25 More recently, the appearance of BKT transition was also reported in bulk 3D high T c superconductors. [26][27][28][29] Below we show that in spite of the fact that our system is not the standard 2D context in which the BKT transition was usually considered, experimental data nevertheless show surprisingly good agreement with its various predictions.…”

Section: B Analogy With 2d Spin System and The Bkt Transitionmentioning

confidence: 55%

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

et al. 2010

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We report superconducting resistive transition characteristics for array͑s͒ of coupled 4 Å single wall carbon nanotubes embedded in aluminophosphate-five zeolite. The transition was observed to initiate at 15 K with a slow resistance decrease switching to a sharp, order of magnitude drop at ϳ7.5 K. The latter exhibits anisotropic magnetic field dependence, and the differential resistance versus current ͑voltage͒ measurements show a rich variety of details that are consistent with the establishment of coherence, in stages, as the temperature is lowered below 15 K. In particular, the resistance drop that starts at 7.5 K exhibits attributes that are consistent with the manifestations of a Berezinskii-Kosterlitz-Thouless transition that establishes quasi-long-range order in the plane transverse to the c axis of the aligned nanotubes.

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Section: B Analogy With 2d Spin System and The Bkt Transitionmentioning

confidence: 55%

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

et al. 2010

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“…(Note that it is unclear whether any microscopic phase separation occurs in Tl 2-x Mo 6 Se 6 : this would both increase the size and decrease the number of the superconducting and metallic regions). Any nanoscale intergrowth of metallic and superconducting regions generates intrinsic arrays of Proximity junctions (PJ) or Josephson junctions (JJ) which will strongly influence the superconducting properties of such materials [14,15]. In the last three decades the behavior of such arrays has been studied in detail [15][16][17][18][19][20][21] as ideal model systems for real materials, mainly to gain a deeper insight into the nature of the phase transition from the normal into the superconducting state.…”

Section: Introductionmentioning

confidence: 99%

“…Any nanoscale intergrowth of metallic and superconducting regions generates intrinsic arrays of Proximity junctions (PJ) or Josephson junctions (JJ) which will strongly influence the superconducting properties of such materials [14,15]. In the last three decades the behavior of such arrays has been studied in detail [15][16][17][18][19][20][21] as ideal model systems for real materials, mainly to gain a deeper insight into the nature of the phase transition from the normal into the superconducting state. In these materials, the bulk superconducting properties are strongly influenced by fluctuations in the phase of the order parameter.…”

Section: Introductionmentioning

confidence: 99%

Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl₂Mo₆Se₆

et al. 2011

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Tl 2 Mo 6 Se 6 represents a model system for quasi-one-dimensional superconductors. We investigate its superconducting transition in detail by means of electrical transport experiments on high-quality single crystalline samples with onset T c = 6.8 K. Our measurements indicate a highly complex superconducting transition which occurs in different stages, with a characteristic bump in the resistivity and distinct plateau structures in the supercurrent gap imaged by V-I curves. We interpret these features as fingerprints of the gradual establishment of global phase coherence in an array of weakly coupled parallel one-dimensional (1D) superconducting bundles. In this way, we demonstrate that superconducting Tl 2 Mo 6 Se 6 behaves like an intrinsic array of Proximity or Josephson junctions, undergoing a complex superconducting phase-ordering transition at 4.5 K which shows many similarities to the Berezinskii-Kosterlitz-Thouless transition. ♣ present address: Hochfeld-Magnetlabor Dresden,

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“…pressurized (TMTSF) 2 PF 6 [13]. The highly anisotropic nature of such superconductors may imply the formation of intrinsic arrays of Josephson junctions (JJ) [14,15] within their crystalline structure. The global superconducting transition of arrays of JJs has been demonstrated to fall in the same universality class as the Berezinski-Kostelitz-Thouless (BKT) transition [16].…”

Section: Introductionmentioning

confidence: 99%

Observation of the Meissner state in superconducting arrays of 4-Å carbon nanotubes

et al. 2011

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We report clear observations of the magnetic Meissner Effect in arrays of superconducting 4 Å carbon nanotubes grown in the linear channels of AlPO 4 -5 (AFI) zeolite single crystals. Both bulk magnetization and magnetic torque experiments show a pronounced signature of the lower critical H c1 transition, a difference in zero-field cooled and field cooled branches during temperature sweeps below 6K, and signatures of 1D superconducting fluctuations below ~15-18 K. These experiments extend the magnetic phase diagram we obtained previously by resistive experiments [Z. Wang et al., Phys. Rev. B 81, 174530 (2010)] towards low magnetic fields and within the range of zero resistance.

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Nonlinear current-voltage characteristics of three-dimensional Josephson-junction arrays with anisotropic interactions

Cited by 16 publications

References 21 publications

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl₂Mo₆Se₆

Observation of the Meissner state in superconducting arrays of 4-Å carbon nanotubes

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Nonlinear current-voltage characteristics of three-dimensional Josephson-junction arrays with anisotropic interactions

Cited by 16 publications

References 21 publications

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

Superconducting resistive transition in coupled arrays of4Åcarbon nanotubes

Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl2Mo6Se6

Observation of the Meissner state in superconducting arrays of 4-Å carbon nanotubes

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Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case of the extreme quasi-1D superconductor Tl₂Mo₆Se₆