Dissipative Enhancement of the Supercurrent inTl2Ba2CaCu2O8Intrinsic Josephson Junctions

Abstract

We have measured dissipation-induced localization of the reaction coordinate for a metastable-state decay process in a model system with moderate damping. Specifically, the supercurrent in an array of Tl2Ba2CaCu2O8 intrinsic Josephson junctions is larger when all the junctions are in the zero-voltage state than when one or more junctions are in the voltage state since the dissipation is larger in the former case.

The radio-frequency impedance of individual intrinsic Josephson junctions

“…The slight suppression of the switching current as the branch number n increases is probably due to Ohmic heating. The switching current on the supercurrent branch (n = 0) is larger (66 µA) as is commonly observed in measurements of IJJ stacks [11,13]. From fits to switching current distributions (not shown) we find the unfluctuated critical current to be I C = 80 µA, and hence the plasma frequency,…”

Comparative analysis of tunneling magnetoresistance in low-TcNb/Al-AlOx/Nb and high-TcBiKrasnov1, Motzkau2, Golod3 et al. 2011Phys. Rev. B236500View full textAdd to dashboardCite

“…A rare exception is the c-axis transport in extremely anisotropic layered cuprates. Single crystals of Bi-, Tl-, 31,32 and Hg-based 33 cuprates represent natural stacks of atomic scale intrinsic tunnel junctions. The intrinsic tunneling spectroscopy (ITS) provides a unique opportunity to probe directly bulk electronic spectra of cuprates.…”

Comparative Study of First and Second Switches with Nearly Identical Switching Current in Bi2Sr2Ca0.85Y0.15Cu2Oy Intrinsic Josephson Junctions

“…[2][3][4][5] The most striking feature is that a crossover temperature, T cr , to the MQT state in the phase switch from the first to the second resistive branch (2nd SW) is largely enhanced compared to that from the zero voltage to the first resistive branch (1st SW) in the multi-branched current-voltage (I-V) characteristics of IJJs. [6][7][8][9][10][11][12][13][14][15] An early study 6) suggested that such an enhancement was due to the self-heating effects in the first resistive state, based on the consideration that a series array of uniform Josephson junctions should show the same value of T cr as long as the current flowing in each junction agrees with the externally-applied bias current.However, the anomalous increase of T 2nd cr was found to be independent of the device structure of IJJs with different heat-transfer environment 7) and the order of phase switches, 10) throwing doubt on the self-heating effects after the 1st SW.…”