Doping Dependence on Two Sizes of Superconducting Gaps on Tl1223 by Tunneling Spectroscopy at 4.2 K

R. Sekine; S. Kawashima; M. Minematsu; T. Inose; S. Mikusu; K. Tokiwa; T. Watanabe; A. Tsukada; N. Miyakawa

doi:10.1016/j.phpro.2015.05.111

Doping Dependence on Two Sizes of Superconducting Gaps on Tl1223 by Tunneling Spectroscopy at 4.2 K

R. Sekine, S. Kawashima, M. Minematsu, T. Inose, S. Mikusu, K. Tokiwa, T. Watanabe, A. Tsukada, N. Miyakawa

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

2 Citations (Scopus)

Abstract

We present tunneling results on tri-layered cuprate superconductors TlBa₂Ca₂Cu₃O_8.5+δ (Tl1223) with two different hole concentration, which are an over-doped Tl1223 with T_C ∼ 112 K (OD-112K) and a slightly over-doped Tl1223 with T_C ∼ 126 K (SOD-126K). The tunneling conductances on both samples exhibited two sizes of gaps originated from outer (OP) and inner (IP) CuO₂ planes. The superconducting gap at each planes, Δ_(OP)/e ≈V_p(OP) and Δ_(IP)/e ≈V_p(IP) on OD-112K are observed that V_p(OP) is 22 ± 2 mV and V_p(IP) is 37 ± 4 mV. Similarly, V_p(OP) is 26 ± 2 mV and V_p(IP) is 39 ± 3 mV on SOD-126K. Although both V_p(OP) and V_p(IP) decrease with increasing oxygen contents, ΔV_p(OP) = V_{p(OP)(SOD-126K)} - V_{p(OP)(OD-112K)} is larger than ΔV_p(IP) for IP. Moreover, ΔV_p(plane) V_p(IP) - V_p(OP) increases with overdoping. These results as a function of doping implies the OP might control the variation of T_C dominantly.

Original language	English
Pages (from-to)	45-48
Number of pages	4
Journal	Physics Procedia
Volume	65
DOIs	https://doi.org/10.1016/j.phpro.2015.05.111
Publication status	Published - 2015
Event	27th International Symposium on Superconductivity, ISS 2014 - Tokyo, Japan Duration: 25 Nov 2014 → 27 Nov 2014

Keywords

Doping dependence
Multilayer cuprates
Tl1223
Tunneling spectroscopy
Two-gaps

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10.1016/j.phpro.2015.05.111

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@article{997e16159b8d42af8399ed8af065e80c,

title = "Doping Dependence on Two Sizes of Superconducting Gaps on Tl1223 by Tunneling Spectroscopy at 4.2 K",

abstract = "We present tunneling results on tri-layered cuprate superconductors TlBa2Ca2Cu3O8.5+δ (Tl1223) with two different hole concentration, which are an over-doped Tl1223 with TC ∼ 112 K (OD-112K) and a slightly over-doped Tl1223 with TC ∼ 126 K (SOD-126K). The tunneling conductances on both samples exhibited two sizes of gaps originated from outer (OP) and inner (IP) CuO2 planes. The superconducting gap at each planes, Δ(OP)/e ≈Vp(OP) and Δ(IP)/e ≈Vp(IP) on OD-112K are observed that Vp(OP) is 22 ± 2 mV and Vp(IP) is 37 ± 4 mV. Similarly, Vp(OP) is 26 ± 2 mV and Vp(IP) is 39 ± 3 mV on SOD-126K. Although both Vp(OP) and Vp(IP) decrease with increasing oxygen contents, ΔVp(OP) = Vp(OP)(SOD-126K) - Vp(OP)(OD-112K) is larger than ΔVp(IP) for IP. Moreover, ΔVp(plane) Vp(IP) - Vp(OP) increases with overdoping. These results as a function of doping implies the OP might control the variation of TC dominantly.",

keywords = "Doping dependence, Multilayer cuprates, Tl1223, Tunneling spectroscopy, Two-gaps",

author = "R. Sekine and S. Kawashima and M. Minematsu and T. Inose and S. Mikusu and K. Tokiwa and T. Watanabe and A. Tsukada and N. Miyakawa",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors.; 27th International Symposium on Superconductivity, ISS 2014 ; Conference date: 25-11-2014 Through 27-11-2014",

year = "2015",

doi = "10.1016/j.phpro.2015.05.111",

language = "English",

volume = "65",

pages = "45--48",

journal = "Physics Procedia",

issn = "1875-3884",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Doping Dependence on Two Sizes of Superconducting Gaps on Tl1223 by Tunneling Spectroscopy at 4.2 K

AU - Sekine, R.

AU - Kawashima, S.

AU - Minematsu, M.

AU - Inose, T.

AU - Mikusu, S.

AU - Tokiwa, K.

AU - Watanabe, T.

AU - Tsukada, A.

AU - Miyakawa, N.

PY - 2015

Y1 - 2015

N2 - We present tunneling results on tri-layered cuprate superconductors TlBa2Ca2Cu3O8.5+δ (Tl1223) with two different hole concentration, which are an over-doped Tl1223 with TC ∼ 112 K (OD-112K) and a slightly over-doped Tl1223 with TC ∼ 126 K (SOD-126K). The tunneling conductances on both samples exhibited two sizes of gaps originated from outer (OP) and inner (IP) CuO2 planes. The superconducting gap at each planes, Δ(OP)/e ≈Vp(OP) and Δ(IP)/e ≈Vp(IP) on OD-112K are observed that Vp(OP) is 22 ± 2 mV and Vp(IP) is 37 ± 4 mV. Similarly, Vp(OP) is 26 ± 2 mV and Vp(IP) is 39 ± 3 mV on SOD-126K. Although both Vp(OP) and Vp(IP) decrease with increasing oxygen contents, ΔVp(OP) = Vp(OP)(SOD-126K) - Vp(OP)(OD-112K) is larger than ΔVp(IP) for IP. Moreover, ΔVp(plane) Vp(IP) - Vp(OP) increases with overdoping. These results as a function of doping implies the OP might control the variation of TC dominantly.

AB - We present tunneling results on tri-layered cuprate superconductors TlBa2Ca2Cu3O8.5+δ (Tl1223) with two different hole concentration, which are an over-doped Tl1223 with TC ∼ 112 K (OD-112K) and a slightly over-doped Tl1223 with TC ∼ 126 K (SOD-126K). The tunneling conductances on both samples exhibited two sizes of gaps originated from outer (OP) and inner (IP) CuO2 planes. The superconducting gap at each planes, Δ(OP)/e ≈Vp(OP) and Δ(IP)/e ≈Vp(IP) on OD-112K are observed that Vp(OP) is 22 ± 2 mV and Vp(IP) is 37 ± 4 mV. Similarly, Vp(OP) is 26 ± 2 mV and Vp(IP) is 39 ± 3 mV on SOD-126K. Although both Vp(OP) and Vp(IP) decrease with increasing oxygen contents, ΔVp(OP) = Vp(OP)(SOD-126K) - Vp(OP)(OD-112K) is larger than ΔVp(IP) for IP. Moreover, ΔVp(plane) Vp(IP) - Vp(OP) increases with overdoping. These results as a function of doping implies the OP might control the variation of TC dominantly.

KW - Doping dependence

KW - Multilayer cuprates

KW - Tl1223

KW - Tunneling spectroscopy

KW - Two-gaps

UR - http://www.scopus.com/inward/record.url?scp=84948407610&partnerID=8YFLogxK

U2 - 10.1016/j.phpro.2015.05.111

DO - 10.1016/j.phpro.2015.05.111

M3 - Conference article

AN - SCOPUS:84948407610

SN - 1875-3884

VL - 65

SP - 45

EP - 48

JO - Physics Procedia

JF - Physics Procedia

T2 - 27th International Symposium on Superconductivity, ISS 2014

Y2 - 25 November 2014 through 27 November 2014

ER -

Doping Dependence on Two Sizes of Superconducting Gaps on Tl1223 by Tunneling Spectroscopy at 4.2 K

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