Spin-polarized quasiparticle injection into YBCO

I. Jin; Z. Chen; T. Wu; S. P. Pai; Z. Dong; S. B. Ogale; R. Ramesh; T. Venkatesan

doi:10.1109/77.783817

Spin-polarized quasiparticle injection into YBCO

I. Jin^*, Z. Chen, T. Wu, S. P. Pai, Z. Dong, S. B. Ogale, R. Ramesh, T. Venkatesan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

FET-type devices have been fabricated by using trilayers of Nd_0.7Sr_0.3MnO₃ (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 Pr_1.85Ce_0.15CuO₄ (PCCO) and Pbln have been tested in similar devices for comparison.

Original language	English (US)
Pages (from-to)	3640-3643
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	9
Issue number	2 PART 3
DOIs	https://doi.org/10.1109/77.783817
State	Published - 1999
Externally published	Yes

Bibliographical note

Funding Information:
a) Also Department of Electical Engineering, University of Maryland, College Park. b) Present address is Solid State Electronics Group, Tata Institute Of Fundamental Research, India, c) Present address is Read-kte Corporation, 44100 Osgood Road, Fremont, CA 94539. d) Also Department of Material and nuclear Engineering, University of Maryland, College Park. Manuscript received September 14,1998. This work is supported by Office of Naval Research under Grant No. N00014-98-1-0092,

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/77.783817

Cite this

@article{0539fc563c91482eb0d313bbaa1aea83,

title = "Spin-polarized quasiparticle injection into YBCO",

abstract = "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, def{\^i}ned 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.",

author = "I. Jin and Z. Chen and T. Wu and Pai, {S. P.} and Z. Dong and Ogale, {S. B.} and R. Ramesh and T. Venkatesan",

note = "Funding Information: a) Also Department of Electical Engineering, University of Maryland, College Park. b) Present address is Solid State Electronics Group, Tata Institute Of Fundamental Research, India, c) Present address is Read-kte Corporation, 44100 Osgood Road, Fremont, CA 94539. d) Also Department of Material and nuclear Engineering, University of Maryland, College Park. Manuscript received September 14,1998. This work is supported by Office of Naval Research under Grant No. N00014-98-1-0092,",

year = "1999",

doi = "10.1109/77.783817",

language = "English (US)",

volume = "9",

pages = "3640--3643",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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TY - JOUR

T1 - Spin-polarized quasiparticle injection into YBCO

AU - Jin, I.

AU - Chen, Z.

AU - Wu, T.

AU - Pai, S. P.

AU - Dong, Z.

AU - Ogale, S. B.

AU - Ramesh, R.

AU - Venkatesan, T.

N1 - Funding Information: a) Also Department of Electical Engineering, University of Maryland, College Park. b) Present address is Solid State Electronics Group, Tata Institute Of Fundamental Research, India, c) Present address is Read-kte Corporation, 44100 Osgood Road, Fremont, CA 94539. d) Also Department of Material and nuclear Engineering, University of Maryland, College Park. Manuscript received September 14,1998. This work is supported by Office of Naval Research under Grant No. N00014-98-1-0092,

PY - 1999

Y1 - 1999

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.

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.

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U2 - 10.1109/77.783817

DO - 10.1109/77.783817

M3 - Article

AN - SCOPUS:0032670378

SN - 1051-8223

VL - 9

SP - 3640

EP - 3643

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2 PART 3

ER -

Spin-polarized quasiparticle injection into YBCO

Abstract

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