Scanning tunneling microscopy investigation of single electron tunneling in Co-Al-O and Cu-Al-O granular films

被引：14

作者：

Takanashi, K ^{[1
]}

Mitani, S ^{[1
]}

Chiba, J ^{[1
]}

Fujimori, H ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 87卷 / 09期

关键词：

D O I：

10.1063/1.372696

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated single electron tunneling in Co-Al-O and Cu-Al-O granular films using scanning tunneling microscopy (STM). Topographic images show well-defined granular structures where nanometer-sized metal granules are embedded in insulating matrix. The Coulomb staircases in the current-voltage (I-V) curves are clearly observed even at room temperature in both films. For the Co-Al-O film, furthermore, negative differential conductance appears in the Coulomb staircase. (C) 2000 American Institute of Physics. [S0021-8979(00)74808-0].

引用

页码：6331 / 6333

页数：3

共 10 条

[1]

ABELES B, 1975, ADV PHYS, V24, P407, DOI 10.1080/00018737500101431

[2] Effects of spin accumulation on single-electron tunneling in a double ferromagnetic microjunction [J].

Barnas, J ;

Fert, A .

EUROPHYSICS LETTERS, 1998, 44 (01) :85-90

[3]

CHIBA J, 1999, J MAGN SOC JPN, V23, P82

[4] TUNNEL-TYPE GMR IN METAL-NONMETAL GRANULAR ALLOY THIN-FILMS [J].

FUJIMORI, H ;

MITANI, S ;

OHNUMA, S .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1995, 31 (1-2) :219-223

[5] Coulomb staircase in STM current through granular films [J].

Imamura, H ;

Chiba, J ;

Mitani, S ;

Takanashi, K ;

Takahashi, S ;

Maekawa, S ;

Fujimori, H .

PHYSICAL REVIEW B, 2000, 61 (01) :46-49

[6] Spin dependent tunneling [J].

Levy, PM ;

Zhang, SF .

CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE, 1999, 4 (02) :223-229

[7] Enhanced magnetoresistance in insulating granular systems: Evidence for higher-order tunneling [J].

Mitani, S ;

Takahashi, S ;

Takanashi, K ;

Yakushiji, K ;

Maekawa, S ;

Fujimori, H .

PHYSICAL REVIEW LETTERS, 1998, 81 (13) :2799-2802

[8] Anomalous behavior of temperature and bias-voltage dependence of tunnel-type giant magnetoresistance in insulating granular systems [J].

Mitani, S ;

Takanashi, K ;

Yakushiji, K ;

Fujimori, H .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (11) :6524-6526

[9] Microstructure of Co-Al-O granular thin films [J].

Ohnuma, M ;

Hono, K ;

Abe, E ;

Onodera, H ;

Mitani, S ;

Fujimori, H .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (11) :5646-5652

[10]

YAKUSHIJI K, IN PRESS J MAGN MAGN

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