Unified Transport and Susceptibility Analysis of a Thin BSCCO Film: From Local Pairing to Global Phase Coherence
Abstract
The superconducting transition in thin high-Tc films can be significantly broadened by disorder, spatial inhomogeneity, and phase fluctuations. Here, we study the transition in a 30-nm-thick sputter-grown Bi2Sr2CaCu2O8+δ (BSCCO) film through electrical-transport and ac-susceptibility measurements. The resistive transition is examined using a Gaussian distribution of local Tc values and the Ambegaokar--Halperin model, describing spatial variations in superconductivity and thermally activated phase dynamics, respectively. To relate the transport and magnetic responses, we extend the Choy--Stoneham susceptibility model by introducing the superconducting fraction extracted from transport and a temperature-dependent connectivity factor representing the gradual development of Josephson coupling among superconducting regions. The results identify separate temperature regimes corresponding to the onset of local superconductivity, expansion of the superconducting fraction, development of magnetic screening, and establishment of global phase coherence. The transition therefore proceeds progressively, from locally superconducting regions to a connected, phase-coherent state. This analysis provides a common framework for relating spatial inhomogeneity, dissipative phase dynamics, and magnetic screening in inhomogeneous superconducting films.
Related
- Influence of pairing and correlations on transport properties in three-terminal superconducting nanostructure
- Orbital-coherence memory in electrical transport and its self-consistent Maxwell response
- Quantum transport and unified scaling law in graphene with polyadic Cantor electrostatic barriers
- Polar-Domain Volume as a Unified Descriptor of Transport in Ionic Liquids
- Unified contact-free formulation of linear-response transport theory
BibTeX
@misc{jana2026unified,
title = {{Unified Transport and Susceptibility Analysis of a Thin BSCCO Film: From Local Pairing to Global Phase Coherence}},
author = {Santu Prasad Jana and Bismaya Ranjan Nayak and Sohini Guin and Akshay Naik and Dhavala Suri and Arindam Ghosh},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.19303},
eprint = {2609.19303},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.19303},
}
RIS
TY - UNPB
TI - Unified Transport and Susceptibility Analysis of a Thin BSCCO Film: From Local Pairing to Global Phase Coherence
AU - Santu Prasad Jana
AU - Bismaya Ranjan Nayak
AU - Sohini Guin
AU - Akshay Naik
AU - Dhavala Suri
AU - Arindam Ghosh
PY - 2026
DA - 2026/09/24
PB - arXiv
DO - 10.48550/arxiv.2609.19303
UR - https://arxiv.org/abs/2609.19303
AB - The superconducting transition in thin high-T_c films can be significantly broadened by disorder, spatial inhomogeneity, and phase fluctuations. Here, we study the transition in a 30-nm-thick sputter-grown Bi_2Sr_2CaCu_2O_8+δ (BSCCO) film through electrical-transport and ac-susceptibility measurements. The resistive transition is examined using a Gaussian distribution of local T_c values and the Ambegaokar--Halperin model, describing spatial variations in superconductivity and thermally activated phase dynamics, respectively. To relate the transport and magnetic responses, we extend the Choy--Stoneham susceptibility model by introducing the superconducting fraction extracted from transport and a temperature-dependent connectivity factor representing the gradual development of Josephson coupling among superconducting regions. The results identify separate temperature regimes corresponding to the onset of local superconductivity, expansion of the superconducting fraction, development of magnetic screening, and establishment of global phase coherence. The transition therefore proceeds progressively, from locally superconducting regions to a connected, phase-coherent state. This analysis provides a common framework for relating spatial inhomogeneity, dissipative phase dynamics, and magnetic screening in inhomogeneous superconducting films.
ER -