Formation of High Temperature Superconducting Balls

R. Tao; X. Zhang; X. Tang; P. W. Anderson

doi:10.1103/PhysRevLett.83.5575

← Back to search

Formation of High Temperature Superconducting Balls

R. Tao, X. Zhang, X. Tang, P. W. Anderson

DOI 10.1103/PhysRevLett.83.5575 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

High- Tc superconducting particles of μm size in a strong electric field bind themselves together to form macroscopic balls in milliseconds. Each ball holds over 106 particles and bounces between the electrodes without losing any. The ball formation is a result of superconductivity. As the c-axis coherence length is shorter than the Thomas-Fermi screening length, the electric field produced by the charged surface layer turns off the coupling between the interlayers. This loss of Josephson energy becomes a positive surface energy induced by the charged surface layer, the minimization of which leads to the balls.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	92	Pressure not reported	unknown
NdBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	94	Pressure not reported	unknown
Bi2Sr2CaCu2O8-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	84	Pressure not reported	unknown
YbBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	87	Pressure not reported	unknown