The chemical control of high-Tc superconductivity: Metal-superconductor-insulator transition in (Tl1-yPby)Sr2(Ca1-xYx)Cu2O7

R. S. Liu; P. P. Edwards; S. F. Hu; D. A. Jefferson; Y. T. Huang; S. F. Wu; M. J. Tsai

doi:10.1007/BF02818061

The chemical control of high-T_c superconductivity: Metal-superconductor-insulator transition in (Tl_1-yPb_y)Sr₂(Ca_1-xY_x)Cu₂O₇

R. S. Liu^*, P. P. Edwards, S. F. Hu, D. A. Jefferson, Y. T. Huang, S. F. Wu, M. J. Tsai

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We have carried out a detailed study of the relationship between the semiconducting, the superconducting, and the metallic region in the system (Tl_0.5Pb_0.5)Sr₂(Ca_1-xY_x)Cu₂O₇. The critical density (or concentration), n_c, derived from Hall measurement of the titled series compounds at which the transition from insulator to metal place can be given by the well-known Mott formula: n_c^1/3a_H^*=0.26 where a_H^* is the effective Bohr orbit radius of the isolated donor or acceptor state wavefunction. We propose that the insulator-metal transition in the cuprates generally occurs at a very high hole density (n_c∼10²⁰-10²¹cm^-3) as compared to conventional doped semiconductors (n_c∼10¹⁷-10¹⁸cm^-3) but rather lower than the critical densities for elemental metals (n_c>10²¹cm^-3).

Original language	English
Pages (from-to)	1199-1203
Number of pages	5
Journal	Journal of Electronic Materials
Volume	22
Issue number	10
DOIs	https://doi.org/10.1007/BF02818061
Publication status	Published - 1993 Oct
Externally published	Yes

Keywords

(Tl, Pb)-1212
Hall effect
Mott criterion
metal-insulator transition
resistivity
strontium
yttrium

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

Access to Document

10.1007/BF02818061

Cite this

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title = "The chemical control of high-Tc superconductivity: Metal-superconductor-insulator transition in (Tl1-yPby)Sr2(Ca1-xYx)Cu2O7",

abstract = "We have carried out a detailed study of the relationship between the semiconducting, the superconducting, and the metallic region in the system (Tl0.5Pb0.5)Sr2(Ca1-xYx)Cu2O7. The critical density (or concentration), nc, derived from Hall measurement of the titled series compounds at which the transition from insulator to metal place can be given by the well-known Mott formula: nc 1/3aH *=0.26 where aH * is the effective Bohr orbit radius of the isolated donor or acceptor state wavefunction. We propose that the insulator-metal transition in the cuprates generally occurs at a very high hole density (nc∼1020-1021cm-3) as compared to conventional doped semiconductors (nc∼1017-1018cm-3) but rather lower than the critical densities for elemental metals (nc>1021cm-3).",

keywords = "(Tl, Pb)-1212, Hall effect, Mott criterion, metal-insulator transition, resistivity, strontium, yttrium",

author = "Liu, {R. S.} and Edwards, {P. P.} and Hu, {S. F.} and Jefferson, {D. A.} and Huang, {Y. T.} and Wu, {S. F.} and Tsai, {M. J.}",

year = "1993",

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doi = "10.1007/BF02818061",

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AU - Liu, R. S.

AU - Edwards, P. P.

AU - Hu, S. F.

AU - Jefferson, D. A.

AU - Huang, Y. T.

AU - Wu, S. F.

AU - Tsai, M. J.

PY - 1993/10

Y1 - 1993/10

N2 - We have carried out a detailed study of the relationship between the semiconducting, the superconducting, and the metallic region in the system (Tl0.5Pb0.5)Sr2(Ca1-xYx)Cu2O7. The critical density (or concentration), nc, derived from Hall measurement of the titled series compounds at which the transition from insulator to metal place can be given by the well-known Mott formula: nc 1/3aH *=0.26 where aH * is the effective Bohr orbit radius of the isolated donor or acceptor state wavefunction. We propose that the insulator-metal transition in the cuprates generally occurs at a very high hole density (nc∼1020-1021cm-3) as compared to conventional doped semiconductors (nc∼1017-1018cm-3) but rather lower than the critical densities for elemental metals (nc>1021cm-3).

AB - We have carried out a detailed study of the relationship between the semiconducting, the superconducting, and the metallic region in the system (Tl0.5Pb0.5)Sr2(Ca1-xYx)Cu2O7. The critical density (or concentration), nc, derived from Hall measurement of the titled series compounds at which the transition from insulator to metal place can be given by the well-known Mott formula: nc 1/3aH *=0.26 where aH * is the effective Bohr orbit radius of the isolated donor or acceptor state wavefunction. We propose that the insulator-metal transition in the cuprates generally occurs at a very high hole density (nc∼1020-1021cm-3) as compared to conventional doped semiconductors (nc∼1017-1018cm-3) but rather lower than the critical densities for elemental metals (nc>1021cm-3).

KW - (Tl, Pb)-1212

KW - Hall effect

KW - Mott criterion

KW - metal-insulator transition

KW - resistivity

KW - strontium

KW - yttrium

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