Evidence for localized high-Tc superconducting regions on the surface of Na-doped WO3

Y. Levi; O. Millo; A. Sharoni; Y. Tsabba; G. Leitus; S. Reich

doi:10.1209/epl/i2000-00375-2

Evidence for localized high-T_c superconducting regions on the surface of Na-doped WO₃

Y. Levi^*, O. Millo, A. Sharoni, Y. Tsabba, G. Leitus, S. Reich

^*Corresponding author for this work

Racah Institute of Physics

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

51 Scopus citations

Abstract

Scanning tunneling spectroscopy along with magnetization measurements were employed in the study of Na-doped WO₃. The magnetization data suggest that a superconducting phase is formed below T_C = 91 K. Tunneling experiments reveal islands, 20-150 nm in size, having a superconductor-like density of states. These islands cover about 10% of the surface, the rest of which is insulating, and exhibit spectroscopic gaps having values up to 2Δ/kT_C ∼ 4. Therefore this material seems to be a non-cuprate superconductor with a high critical temperature.

Original language	English
Pages (from-to)	564-570
Number of pages	7
Journal	Europhysics Letters
Volume	51
Issue number	5
DOIs	https://doi.org/10.1209/epl/i2000-00375-2
State	Published - 1 Sep 2000

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abstract = "Scanning tunneling spectroscopy along with magnetization measurements were employed in the study of Na-doped WO3. The magnetization data suggest that a superconducting phase is formed below TC = 91 K. Tunneling experiments reveal islands, 20-150 nm in size, having a superconductor-like density of states. These islands cover about 10% of the surface, the rest of which is insulating, and exhibit spectroscopic gaps having values up to 2Δ/kTC ∼ 4. Therefore this material seems to be a non-cuprate superconductor with a high critical temperature.",

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AU - Sharoni, A.

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AU - Leitus, G.

AU - Reich, S.

PY - 2000/9/1

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N2 - Scanning tunneling spectroscopy along with magnetization measurements were employed in the study of Na-doped WO3. The magnetization data suggest that a superconducting phase is formed below TC = 91 K. Tunneling experiments reveal islands, 20-150 nm in size, having a superconductor-like density of states. These islands cover about 10% of the surface, the rest of which is insulating, and exhibit spectroscopic gaps having values up to 2Δ/kTC ∼ 4. Therefore this material seems to be a non-cuprate superconductor with a high critical temperature.

AB - Scanning tunneling spectroscopy along with magnetization measurements were employed in the study of Na-doped WO3. The magnetization data suggest that a superconducting phase is formed below TC = 91 K. Tunneling experiments reveal islands, 20-150 nm in size, having a superconductor-like density of states. These islands cover about 10% of the surface, the rest of which is insulating, and exhibit spectroscopic gaps having values up to 2Δ/kTC ∼ 4. Therefore this material seems to be a non-cuprate superconductor with a high critical temperature.

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Evidence for localized high-T_c superconducting regions on the surface of Na-doped WO₃

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