Zero-bias conductance and energy gap measurements in LaNiO3-YBa2Cu3O7-x junctions

D. Kumar; K. M. Satyalakshmi; M. S. Hegde; Rajiv K. Singh; P. R. Apte; R. Pinto; Clinton B. Lee

doi:10.1088/0953-2048/11/8/009

Zero-bias conductance and energy gap measurements in LaNiO₃-YBa₂Cu₃O_7-x junctions

D. Kumar, K. M. Satyalakshmi, M. S. Hegde, Rajiv K. Singh, P. R. Apte, R. Pinto, Clinton B. Lee

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

Abstract

Conductance measurements of junctions between a high-T_c (YBa₂Cu₃O_7-x) superconductor and a metallic oxide (LaNiO₃) have been carried out along the a-b plane to examine the tunnel-junction spectra. For these measurements, in situ LaNiO₃ films have been grown on c-axis oriented YBa₂Cu₃O_7-x thin films using the pulsed laser deposition technique. Two distinctive energy gaps have been observed along with conductance peaks around zero bias. The analysis of zero-bias conductance and energy gap data suggests the presence of midgap states located at the centre of a finite energy gap. The results obtained are also in accordance with the d-wave nature of high-T_c YBa₂Cu₃O_7-x superconductors.

Original language	English
Pages (from-to)	766-769
Number of pages	4
Journal	Superconductor Science and Technology
Volume	11
Issue number	8
DOIs	https://doi.org/10.1088/0953-2048/11/8/009
State	Published - Aug 1998
Externally published	Yes

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title = "Zero-bias conductance and energy gap measurements in LaNiO3-YBa2Cu3O7-x junctions",

abstract = "Conductance measurements of junctions between a high-Tc (YBa2Cu3O7-x) superconductor and a metallic oxide (LaNiO3) have been carried out along the a-b plane to examine the tunnel-junction spectra. For these measurements, in situ LaNiO3 films have been grown on c-axis oriented YBa2Cu3O7-x thin films using the pulsed laser deposition technique. Two distinctive energy gaps have been observed along with conductance peaks around zero bias. The analysis of zero-bias conductance and energy gap data suggests the presence of midgap states located at the centre of a finite energy gap. The results obtained are also in accordance with the d-wave nature of high-Tc YBa2Cu3O7-x superconductors.",

author = "D. Kumar and Satyalakshmi, {K. M.} and Hegde, {M. S.} and Singh, {Rajiv K.} and Apte, {P. R.} and R. Pinto and Lee, {Clinton B.}",

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T1 - Zero-bias conductance and energy gap measurements in LaNiO3-YBa2Cu3O7-x junctions

AU - Kumar, D.

AU - Satyalakshmi, K. M.

AU - Hegde, M. S.

AU - Singh, Rajiv K.

AU - Apte, P. R.

AU - Pinto, R.

AU - Lee, Clinton B.

PY - 1998/8

Y1 - 1998/8

N2 - Conductance measurements of junctions between a high-Tc (YBa2Cu3O7-x) superconductor and a metallic oxide (LaNiO3) have been carried out along the a-b plane to examine the tunnel-junction spectra. For these measurements, in situ LaNiO3 films have been grown on c-axis oriented YBa2Cu3O7-x thin films using the pulsed laser deposition technique. Two distinctive energy gaps have been observed along with conductance peaks around zero bias. The analysis of zero-bias conductance and energy gap data suggests the presence of midgap states located at the centre of a finite energy gap. The results obtained are also in accordance with the d-wave nature of high-Tc YBa2Cu3O7-x superconductors.

AB - Conductance measurements of junctions between a high-Tc (YBa2Cu3O7-x) superconductor and a metallic oxide (LaNiO3) have been carried out along the a-b plane to examine the tunnel-junction spectra. For these measurements, in situ LaNiO3 films have been grown on c-axis oriented YBa2Cu3O7-x thin films using the pulsed laser deposition technique. Two distinctive energy gaps have been observed along with conductance peaks around zero bias. The analysis of zero-bias conductance and energy gap data suggests the presence of midgap states located at the centre of a finite energy gap. The results obtained are also in accordance with the d-wave nature of high-Tc YBa2Cu3O7-x superconductors.

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Zero-bias conductance and energy gap measurements in LaNiO₃-YBa₂Cu₃O_7-x junctions

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