Two Sizes of Superconducting Gaps on an Under-doped Bi2.1Sr1.9Ca2Cu3O10+δ with TC ∼ 101 K by Tunneling Spectroscopy

R. Sekine; K. Ogata; A. Tsukada; N. Miyakawa

doi:10.1016/j.phpro.2014.09.026

Two Sizes of Superconducting Gaps on an Under-doped Bi_2.1Sr_1.9Ca₂Cu₃O_10+δ with T_C ∼ 101 K by Tunneling Spectroscopy

R. Sekine, K. Ogata, A. Tsukada, N. Miyakawa

Research output: Contribution to journal › Conference article › peer-review

8 Citations (Scopus)

Abstract

We measured tunneling conductances on an under-doped trilayer cuprate Bi_2.1Sr_1.9Ca₂Cu₃O_10+? (Bi2223) with T_C ∼ 101 K by a point contact method, which has three CuO₂ planes in a unit cell. The tunneling conductances on Bi2223 exhibited two sizes of gaps originated from outer and inner CuO₂ plane (OP and IP). The estimated size of superconducting gap from OP Δ_OP is 34 ± 6 meV, and the Δ_IP from IP is 51 ± 5 meV, respectively. We also observed tunneling conductances which simultaneously displayed two superconducting peaks of OP and IP. Moreover, we propose the model of two superconductor-insulator-normal metal junctions which exhibit two sizes gaps of OP and IP.

Original language	English
Pages (from-to)	82-85
Number of pages	4
Journal	Physics Procedia
Volume	58
DOIs	https://doi.org/10.1016/j.phpro.2014.09.026
Publication status	Published - 2014
Event	26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan Duration: 18 Nov 2013 → 20 Nov 2013

Keywords

Multi-layer cuprates
Tunneling spectroscopy
Two-gaps
UD-Bi2223

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10.1016/j.phpro.2014.09.026

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title = "Two Sizes of Superconducting Gaps on an Under-doped Bi2.1Sr1.9Ca2Cu3O10+δ with TC ∼ 101 K by Tunneling Spectroscopy",

abstract = "We measured tunneling conductances on an under-doped trilayer cuprate Bi2.1Sr1.9Ca2Cu3O10+? (Bi2223) with TC ∼ 101 K by a point contact method, which has three CuO2 planes in a unit cell. The tunneling conductances on Bi2223 exhibited two sizes of gaps originated from outer and inner CuO2 plane (OP and IP). The estimated size of superconducting gap from OP ΔOP is 34 ± 6 meV, and the ΔIP from IP is 51 ± 5 meV, respectively. We also observed tunneling conductances which simultaneously displayed two superconducting peaks of OP and IP. Moreover, we propose the model of two superconductor-insulator-normal metal junctions which exhibit two sizes gaps of OP and IP.",

keywords = "Multi-layer cuprates, Tunneling spectroscopy, Two-gaps, UD-Bi2223",

author = "R. Sekine and K. Ogata and A. Tsukada and N. Miyakawa",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors.; 26th International Symposium on Superconductivity, ISS 2013 ; Conference date: 18-11-2013 Through 20-11-2013",

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journal = "Physics Procedia",

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T1 - Two Sizes of Superconducting Gaps on an Under-doped Bi2.1Sr1.9Ca2Cu3O10+δ with TC ∼ 101 K by Tunneling Spectroscopy

AU - Sekine, R.

AU - Ogata, K.

AU - Tsukada, A.

AU - Miyakawa, N.

PY - 2014

Y1 - 2014

N2 - We measured tunneling conductances on an under-doped trilayer cuprate Bi2.1Sr1.9Ca2Cu3O10+? (Bi2223) with TC ∼ 101 K by a point contact method, which has three CuO2 planes in a unit cell. The tunneling conductances on Bi2223 exhibited two sizes of gaps originated from outer and inner CuO2 plane (OP and IP). The estimated size of superconducting gap from OP ΔOP is 34 ± 6 meV, and the ΔIP from IP is 51 ± 5 meV, respectively. We also observed tunneling conductances which simultaneously displayed two superconducting peaks of OP and IP. Moreover, we propose the model of two superconductor-insulator-normal metal junctions which exhibit two sizes gaps of OP and IP.

AB - We measured tunneling conductances on an under-doped trilayer cuprate Bi2.1Sr1.9Ca2Cu3O10+? (Bi2223) with TC ∼ 101 K by a point contact method, which has three CuO2 planes in a unit cell. The tunneling conductances on Bi2223 exhibited two sizes of gaps originated from outer and inner CuO2 plane (OP and IP). The estimated size of superconducting gap from OP ΔOP is 34 ± 6 meV, and the ΔIP from IP is 51 ± 5 meV, respectively. We also observed tunneling conductances which simultaneously displayed two superconducting peaks of OP and IP. Moreover, we propose the model of two superconductor-insulator-normal metal junctions which exhibit two sizes gaps of OP and IP.

KW - Multi-layer cuprates

KW - Tunneling spectroscopy

KW - Two-gaps

KW - UD-Bi2223

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DO - 10.1016/j.phpro.2014.09.026

M3 - Conference article

AN - SCOPUS:84934771564

SN - 1875-3884

VL - 58

SP - 82

EP - 85

JO - Physics Procedia

JF - Physics Procedia

T2 - 26th International Symposium on Superconductivity, ISS 2013

Y2 - 18 November 2013 through 20 November 2013

ER -

Two Sizes of Superconducting Gaps on an Under-doped Bi_2.1Sr_1.9Ca₂Cu₃O_10+δ with T_C ∼ 101 K by Tunneling Spectroscopy

Abstract

Keywords

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