Photo-induced reversible change in superconductivity and observation of Planckian dissipation in Bi2Sr2Ca2Cu3O10+δ

Lalita Devi; Niladri Sarkar; Siddharth Kumar; Harish Chandr Chauhan; Budhi Singh; Subhasis Ghosh

doi:10.1209/0295-5075/ae16d1

Issue		EPL Volume 152, Number 4, November 2025


Article Number		46001
Number of page(s)		7
Section		Condensed matter and materials physics
DOI		https://doi.org/10.1209/0295-5075/ae16d1
Published online		20 November 2025

EPL, 152 (2025) 46001

Photo-induced reversible change in superconductivity and observation of Planckian dissipation in Bi₂Sr₂Ca₂Cu₃O_10+δ

Lalita Devi¹, Niladri Sarkar¹^,2, Siddharth Kumar¹, Harish Chandr Chauhan¹, Budhi Singh¹^,3 and Subhasis Ghosh¹ (This email address is being protected from spambots. You need JavaScript enabled to view it. )

¹ School of Physical Sciences, Jawaharlal Nehru University - New Delhi 110067, India
² Department of Physics, Birla Institute of Technology & Science - Pilani-333031, Rajasthan, India
³ School of Mechanical Engineering, Sungkyunkwan University - Suwon, 16419, Republic of Korea

Received: 3 May 2025
Accepted: 23 October 2025

Abstract

We demonstrate that the superconducting properties can be controlled by photoexcitation in $Mathematical equation: $\mathrm {Bi_{2}}\mathrm {Sr_{2}}\mathrm {Ca_{2}}\mathrm {Cu_{3}}\mathrm {O}_{10+\delta }$$ (Bi-2223). It is realized that steady-state photoexcitation converts $Mathematical equation: $\mathrm {Cu^{2+}}$$ ions to spinless $Mathematical equation: $\mathrm {Cu^{1+}}$$ ions, which lowers the superconducting transition temperature, T_c, by suppressing superfluid density. This enables the achievement of a wide range of T_c under controlled exposure of photoexcitation. We observe robust Planckian dissipation in under- and optimally-doped Bi-2223 with photoexcitation over a wide range of T_c achieved with photoexcitation. Our investigations thus open a window for extensive study of temperature-induced changes in superconducting properties without altering the intrinsic properties of the system through chemical doping, providing a unique platform for future applications.

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