Effects of doping on Eu1.5Ce0.5RuSr2Cu2O10: An STM study

Y. Levi; I. Feiner; U. Asaf; O. Millo

doi:10.1016/S0921-4526(99)02301-7

Effects of doping on Eu_1.5Ce_0.5RuSr₂Cu₂O₁₀: An STM study

Y. Levi, I. Feiner, U. Asaf, O. Millo^*

^*Corresponding author for this work

Racah Institute of Physics

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

Abstract

Scanning tunneling spectroscopy (STS) is used to study changes in the spatial distribution of the density of states in high-temperature superconductors as a function of oxygen and hydrogen doping. The STS data correlate well with macroscopic transport measurements. Upon oxygen doping, STS exhibits an overall increase in the superconducting gap, in agreement with the raising of T_c. Small hydrogen doping lowers T_c until the samples become insulating at high concentrations. At the same time, STS images show a development of insulating regions which coalesce as the doping is increased. This suggests that the superconductor to insulator transition takes place in a percolative fashion, even though the samples are nominally single phase.

Original language	American English
Pages (from-to)	647-648
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	284-288
Issue number	PART I
DOIs	https://doi.org/10.1016/S0921-4526(99)02301-7
State	Published - 2000

Keywords

Density of states
STM/STS
Spatial distribution

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10.1016/S0921-4526(99)02301-7

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title = "Effects of doping on Eu1.5Ce0.5RuSr2Cu2O10: An STM study",

abstract = "Scanning tunneling spectroscopy (STS) is used to study changes in the spatial distribution of the density of states in high-temperature superconductors as a function of oxygen and hydrogen doping. The STS data correlate well with macroscopic transport measurements. Upon oxygen doping, STS exhibits an overall increase in the superconducting gap, in agreement with the raising of Tc. Small hydrogen doping lowers Tc until the samples become insulating at high concentrations. At the same time, STS images show a development of insulating regions which coalesce as the doping is increased. This suggests that the superconductor to insulator transition takes place in a percolative fashion, even though the samples are nominally single phase.",

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T1 - Effects of doping on Eu1.5Ce0.5RuSr2Cu2O10

T2 - An STM study

AU - Levi, Y.

AU - Feiner, I.

AU - Asaf, U.

AU - Millo, O.

PY - 2000

Y1 - 2000

N2 - Scanning tunneling spectroscopy (STS) is used to study changes in the spatial distribution of the density of states in high-temperature superconductors as a function of oxygen and hydrogen doping. The STS data correlate well with macroscopic transport measurements. Upon oxygen doping, STS exhibits an overall increase in the superconducting gap, in agreement with the raising of Tc. Small hydrogen doping lowers Tc until the samples become insulating at high concentrations. At the same time, STS images show a development of insulating regions which coalesce as the doping is increased. This suggests that the superconductor to insulator transition takes place in a percolative fashion, even though the samples are nominally single phase.

AB - Scanning tunneling spectroscopy (STS) is used to study changes in the spatial distribution of the density of states in high-temperature superconductors as a function of oxygen and hydrogen doping. The STS data correlate well with macroscopic transport measurements. Upon oxygen doping, STS exhibits an overall increase in the superconducting gap, in agreement with the raising of Tc. Small hydrogen doping lowers Tc until the samples become insulating at high concentrations. At the same time, STS images show a development of insulating regions which coalesce as the doping is increased. This suggests that the superconductor to insulator transition takes place in a percolative fashion, even though the samples are nominally single phase.

KW - Density of states

KW - STM/STS

KW - Spatial distribution

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DO - 10.1016/S0921-4526(99)02301-7

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SN - 0921-4526

VL - 284-288

SP - 647

EP - 648

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - PART I

ER -

Effects of doping on Eu_1.5Ce_0.5RuSr₂Cu₂O₁₀: An STM study

Abstract

Keywords

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