TY - JOUR
KW - Multilayers
KW - Lanthanum compounds
KW - High temperature superconductors
KW - Neodymium compounds
KW - Electromagnetic wave polarization
KW - Critical current density (superconductivity)
KW - Relaxation processes
KW - Yttrium barium copper oxides
KW - Electric current measurement
KW - Electron transport properties
KW - Electron tunneling
KW - Superconducting devices
KW - Critical current suppression
KW - Differential current gain
KW - Gate electrodes
KW - Lanthanum aluminate
KW - Lanthanum niobate
KW - Neodymium strontium manganate
KW - Spin polarized quasiparticle injection
KW - Superconducting channel
KW - Yttrium barium cuprates
AU - I Jin
AU - Z Chen
AU - T Wu
AU - S.P Pai
AU - Z Dong
AU - S.B Ogale
AU - Ramamoorthy Ramesh
AU - T Venkatesan
AB - FET-type devices have been fabricated by using trilayers of Nd0.7Sr0.3MnO3 (NSMO) or LaNiO, (LNO) (gate)/ LaAlO3 (LAO) (barrier) / Yba2Cu3O7 (YBCO) (channel) in order to investigate effect of quasiparticle injection into YBCO. Here, NSMO and LNO were used as gate electrodes for injection of spin-polarized and spin-unpolarized quasiparticles into the superconducting channel, respectively. When injecting along the c-axis of YBCO, the critical current was suppressed with spin-polarized qiiasiparticles 30 times more efficiently than with spin-unpolarized quasiparticles. Differential current gain, defîned as a differential change of the critical current to injection current change, has been achieved up to ∼ 16 for c-axis YBCO. If the response time is limited by quasiparticle relaxation time of ∼ 10 ps, the device may be useful for fast electronics. Preliminary high-speed measurements indicate that part of the critical current suppression may be caused by quasiparticle injection, not all by heating. When injecting along a-axis, no significant dependence on quasiparticle polarization was observed. Other superconductors such as Pr1.85Ce0.15CuO4 (PCCO) and Pbln have been tested in similar devices for comparison. © 1999 IEEE.
BT - IEEE Transactions on Applied Superconductivity
DO - 10.1109/77.783817
LA - eng
M1 - 2 PART 3
N1 - cited By 2
N2 - FET-type devices have been fabricated by using trilayers of Nd0.7Sr0.3MnO3 (NSMO) or LaNiO, (LNO) (gate)/ LaAlO3 (LAO) (barrier) / Yba2Cu3O7 (YBCO) (channel) in order to investigate effect of quasiparticle injection into YBCO. Here, NSMO and LNO were used as gate electrodes for injection of spin-polarized and spin-unpolarized quasiparticles into the superconducting channel, respectively. When injecting along the c-axis of YBCO, the critical current was suppressed with spin-polarized qiiasiparticles 30 times more efficiently than with spin-unpolarized quasiparticles. Differential current gain, defîned as a differential change of the critical current to injection current change, has been achieved up to ∼ 16 for c-axis YBCO. If the response time is limited by quasiparticle relaxation time of ∼ 10 ps, the device may be useful for fast electronics. Preliminary high-speed measurements indicate that part of the critical current suppression may be caused by quasiparticle injection, not all by heating. When injecting along a-axis, no significant dependence on quasiparticle polarization was observed. Other superconductors such as Pr1.85Ce0.15CuO4 (PCCO) and Pbln have been tested in similar devices for comparison. © 1999 IEEE.
PY - 1999
SP - 3640
EP - 3643
T2 - IEEE Transactions on Applied Superconductivity
TI - Spin-polarized quasiparticle injection into YBCO
VL - 9
SN - 10518223
ER -