Odd-gap spikes observed by tunneling spectroscopy for La-Sr-Cu-O single crystal

K. Nakajima; T. Arai; S. E. Shafranjuk; T. Yamashita; I. Tanaka; H. Kojima

doi:10.1016/S0921-4534(97)01560-8

Odd-gap spikes observed by tunneling spectroscopy for La-Sr-Cu-O single crystal

K. Nakajima^*, T. Arai, S. E. Shafranjuk, T. Yamashita, I. Tanaka, H. Kojima

^*Corresponding author for this work

Physics and Astronomy

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3 Scopus citations

Abstract

The electron tunneling spectroscopy is performed on Pb-I-La_1-xSr_xCuO₄ (LSCO) junctions fabricated on high quality LSCO single crystals grown by traveling solvent floating zone (TSFZ) method. For the junctions fabricated parallel to ab-planes, periodic sharp spikes in the spectrum are observed at ∼ 6 × (2n + 1) mV, where n is a natural number, while for the junctions fabricated on the (001) plane only gap structures corresponding to Pb and LSCO are observed. We ascribe the spike structure to subbands in the electron density of states caused by the Andreev reflections on the periodically modulated gap potential along the c-axis of LSCO.

Original language	English (US)
Pages (from-to)	292-295
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	293
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(97)01560-8
State	Published - Dec 1997

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(97)01560-8

Cite this

@article{52be563b69364211ad7a7827e7430566,

title = "Odd-gap spikes observed by tunneling spectroscopy for La-Sr-Cu-O single crystal",

abstract = "The electron tunneling spectroscopy is performed on Pb-I-La1-xSrxCuO4 (LSCO) junctions fabricated on high quality LSCO single crystals grown by traveling solvent floating zone (TSFZ) method. For the junctions fabricated parallel to ab-planes, periodic sharp spikes in the spectrum are observed at ∼ 6 × (2n + 1) mV, where n is a natural number, while for the junctions fabricated on the (001) plane only gap structures corresponding to Pb and LSCO are observed. We ascribe the spike structure to subbands in the electron density of states caused by the Andreev reflections on the periodically modulated gap potential along the c-axis of LSCO.",

author = "K. Nakajima and T. Arai and Shafranjuk, {S. E.} and T. Yamashita and I. Tanaka and H. Kojima",

note = "Funding Information: This work has been supported in part by the Grant-in-Aid for Scientific Research (A) and CREST (Core Research for Evolutional Science and Technology) of Japan Science and Technology Corporation.",

year = "1997",

month = dec,

doi = "10.1016/S0921-4534(97)01560-8",

language = "English (US)",

volume = "293",

pages = "292--295",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-4",

}

TY - JOUR

T1 - Odd-gap spikes observed by tunneling spectroscopy for La-Sr-Cu-O single crystal

AU - Nakajima, K.

AU - Arai, T.

AU - Shafranjuk, S. E.

AU - Yamashita, T.

AU - Tanaka, I.

AU - Kojima, H.

N1 - Funding Information: This work has been supported in part by the Grant-in-Aid for Scientific Research (A) and CREST (Core Research for Evolutional Science and Technology) of Japan Science and Technology Corporation.

PY - 1997/12

Y1 - 1997/12

N2 - The electron tunneling spectroscopy is performed on Pb-I-La1-xSrxCuO4 (LSCO) junctions fabricated on high quality LSCO single crystals grown by traveling solvent floating zone (TSFZ) method. For the junctions fabricated parallel to ab-planes, periodic sharp spikes in the spectrum are observed at ∼ 6 × (2n + 1) mV, where n is a natural number, while for the junctions fabricated on the (001) plane only gap structures corresponding to Pb and LSCO are observed. We ascribe the spike structure to subbands in the electron density of states caused by the Andreev reflections on the periodically modulated gap potential along the c-axis of LSCO.

AB - The electron tunneling spectroscopy is performed on Pb-I-La1-xSrxCuO4 (LSCO) junctions fabricated on high quality LSCO single crystals grown by traveling solvent floating zone (TSFZ) method. For the junctions fabricated parallel to ab-planes, periodic sharp spikes in the spectrum are observed at ∼ 6 × (2n + 1) mV, where n is a natural number, while for the junctions fabricated on the (001) plane only gap structures corresponding to Pb and LSCO are observed. We ascribe the spike structure to subbands in the electron density of states caused by the Andreev reflections on the periodically modulated gap potential along the c-axis of LSCO.

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U2 - 10.1016/S0921-4534(97)01560-8

DO - 10.1016/S0921-4534(97)01560-8

M3 - Article

AN - SCOPUS:0031351271

SN - 0921-4534

VL - 293

SP - 292

EP - 295

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

ER -

Odd-gap spikes observed by tunneling spectroscopy for La-Sr-Cu-O single crystal

Abstract

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