Zobrazeno 1 - 10
of 37
pro vyhledávání: '"S. Lomatch"'
Publikováno v:
Physics Letters A. 269:238-244
We have experimentally investigated electron transport in double-barrier Nb/Al/AlO x /Al/AlO x /Nb devices. At low temperatures, the devices reveal a novel magnetic-field-sensitive subgap structure in the current-voltage characteristics, which is int
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:3966-3969
Superconducting circuits based upon Rapid Single Flux Quantum (RSFQ) Logic are an interesting approach for future digital electronics with clock frequencies in the range of 100 GHz. Our intention is to increase the integration density of such circuit
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:4542-4545
We present the design of a double junction ring oscillator, along with initial rf measurements. The ring oscillator design includes the usage of two shunted, stacked junction devices ("Stacktrons") as active switching nodes in the ring. The rf detect
Autor:
S. Lomatch, E.D. Rippert
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:2394-2398
We investigate the response of a Josephson-coupled multilayer to an ultra-short voltage pulse. The response is understood in terms of the dynamics of the phase differences across the layers, calculated from both the microscopic theory and the resisti
Autor:
E. D. Rippert, S. Lomatch
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:3442-3445
We present the results of numerical simulations of a novel neural networking implementation utilizing multilayered Josephson junction (or series array) based synaptic circuits with local memory. These synaptic circuits utilize single flux quanta for
Autor:
S. Lomatch, S. N. Song, Christopher D. Thomas, S. R. Maglic, Melville P. Ulmer, E. D. Rippert, John B Ketterson
Publikováno v:
Applied Superconductivity. 3:567-572
Single and stacked Nb/Al-AlNx/Nb superconducting tunnel junctions with both hysteretic (underdamped) and non-hysteretic (overdamped) current-voltage relationships have been produced utilizing reactively sputtered aluminum nitride tunnel barriers. Sta
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 5:3147-3151
We describe the properties of flux quantum circuitry employing the relatively young technology of multilayer Josephson junctions with n superconductor-insulator (SI) layers. Multilayer junctions can be employed as both passive and active devices to i
Publikováno v:
Physical Review B. 51:12685-12689
Autor:
S. Lomatch, E. D. Rippert
Publikováno v:
Journal of Applied Physics. 76:1711-1719
We present a new type of Josephson transmission line (JTL) in which discrete multilayer Josephson junctions are employed instead of the standard single tri‐layer junction technology. It is shown via numerical simulation that such a structure suppor
Autor:
Melville P. Ulmer, Christopher D. Thomas, S. Lomatch, M. A. Chieda, Jun Chen, S. R. Maglic, E. D. Rippert, John B Ketterson, S. N. Song
Publikováno v:
Remote Sensing Reviews. 8:227-234
Superconducting tunnel junction X‐ray detectors have potential theoretical energy resolutions on the order of eV's. Such high energy resolutions would be of great use for astrophysical observations in the discrimination of spectral lines in hot pla