TUNNELING CHARACTERISTICS OF YBACUO/MGO/PB PLANAR TUNNEL-JUNCTIONS AND OBSERVATION OF JOSEPHSON EFFECT

被引：24

作者：

IGUCHI, I

FURUYAMA, M

KUSUMORI, T

SHIRAI, K

TOMURA, S

NASU, M

OHTAKE, H

机构：

[1] Institute of Materials Science, University of Tsukuba, Tsukuba, lbaraki

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1990年 / 29卷 / 04期

关键词：

High T[!sub]c[!/sub]tunnel junction; Josephson effect; YBaCuO gap structure;

D O I：

10.1143/JJAP.29.L614

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The measurements on reproducible YBa2Cu3Oy(YBCO)/MgO/Pb planar tunnel junctions by an in situ fabrication technique are reported. A thin MgO (1.8-6.0 nm) is used as an insulating barrier. The observed tunnel characteristics exhibit a gap opening structure around 20 mV and the zero bias anomaly, similar to those of YBCO/MgO/Au tunnel junctions as previously reported. For junctions with low tunnel resistance, Josephson current is observed. Josephson critical current against external magnetic field exhibits a Fraunhofer-like pattern. Shapiro steps are also observed under microwave irradiation. © 1990 IOP Publishing Ltd.

引用

页码：L614 / L617

页数：4

共 13 条

[1] EDGAR A, 1988, J PHYS C SOLID STATE, V20, pL1009
[2] INSITU FABRICATION OF REPRODUCIBLE YBCO/AU PLANAR TUNNEL-JUNCTIONS WITH AN ARTIFICIAL MGO BARRIER
FURUYAMA, M
IGUCHI, I
SHIRAI, K
KUSUMORI, T
OHTAKE, H
TOMURA, S
NASU, M
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1990, 29 (03): : L459 - L462
[3] FURUYAMA M, 1989, 2ND P WORKSH HIGH TE, P105
[4] ELECTRON-TUNNELING INTO THIN-FILMS OF Y1BA2CU3O7
GEERK, J
XI, XX
LINKER, G
[J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1988, 73 (03): : 329 - 336
[5] Gray K. E., 1987, Novel Superconductivity. Proceedings of the International Workshop on Novel Mechanisms of Superconductivity, P611
[6] GURVITCH M, 1989, PHYS REV LETT, V63, P1009
[7] QUASIPARTICLE TUNNELING AND JOSEPHSON TUNNELING OF HIGH-TC OXIDE SUPERCONDUCTORS
IGUCHI, I
NARUMI, S
KASAI, Y
SUGISHITA, A
[J]. PHYSICA B & C, 1987, 148 (1-3): : 322 - 324
[8] TUNNELING SPECTROSCOPY OF Y-BA-CU-O COMPOUND
IGUCHI, I
WATANABE, H
KASAI, Y
MOCHIKU, T
SUGISHITA, A
YAMAKA, E
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1987, 26 (05): : L645 - L646
[9] LOCAL TUNNELING MEASUREMENTS OF THE HIGH-TC SUPERCONDUCTOR LA2-XSRXCUO4-Y
KIRTLEY, JR
TSUEI, CC
PARK, SI
CHI, CC
ROZEN, J
SHAFER, MW
[J]. PHYSICAL REVIEW B, 1987, 35 (13): : 7216 - 7219
[10] ELECTRON-TUNNELING AND THE ENERGY-GAP IN BI2SR2CACU2OX
LEE, M
MITZI, DB
KAPITULNIK, A
BEASLEY, MR
[J]. PHYSICAL REVIEW B, 1989, 39 (01): : 801 - 803

← 1 2 →