Tuning the electronic properties of ultrathin La0.7Sr0.3MnO3 films by interfacing with superconducting EuBa2Cu3O7−δ
Y. H. Liu, J. Xiong, J. T. Haraldsen, L. Yan, A. V. Balatsky, Q. X. Jia, A. J. Taylor, D. Yarotski
DOI 10.1103/PhysRevB.87.165140 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Interfaces between transition-metal oxides provide an intriguing platform for modifying the ground states of single constituent materials and creating desired functionalities for applications in oxide-based electronics. Here, we demonstrate that the metallic and ferromagnetic responses of La0.7Sr0.3MnO3 (LSMO) films with thicknesses less than 4 nm, which are insulating when grown directly on SrTiO3 substrates, can be restored through interfacing with a high-temperature cuprate superconductor EuBa2Cu3O7−δ (EBCO). We carried out scanning tunneling microscopy and spectroscopy measurements on the electronic structure of LSMO/EBCO bilayers with thickness of LSMO layer varying from 2 to 7 nm. Our results suggest that the transfer of holes from EBCO to LSMO, caused by the difference in their work functions, is responsible for driving LSMO film with thickness of only five unit cells to the metallic state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| EuBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure unresolved | onset |
Similar papers
Thermal conductivity and superconductivity in EuBa2Cu3O7−x
similarity 0.93M. A. Izbizky et al.
Source status unknown — claims are unverified
Unusual magnetic-field dependence of the electrothermal conductivity in the mixed state of cuprate superconductors
similarity 0.92J. A. Clayhold et al.
Source status unknown — claims are unverified
In situ Ag/YBa2Cu3O7 contacts for superconductor–normal-metal–superconductor devices
similarity 0.92R. P. Robertazzi et al.
Source status unknown — claims are unverified
Structural stability of LuBa2Cu3O7−δ and superconductivity in thin films of Lu1−xMxBa2Cu3O7−δ (M=Pr, Tb, and Ce)
similarity 0.92K. I. Gnanasekar et al.
Source status unknown — claims are unverified
Weak magnetism in insulating and superconducting cuprates
similarity 0.92G. M. De Luca et al.
Source status unknown — claims are unverified
Superconducting weak link generated on a linear array of substrate steps in ultrathin films of YBa2Cu3O7−δ
similarity 0.92A. Tsurumaki & Z. Hiroi
Source status unknown — claims are unverified