Surface Charge Writing and Nonvolatile Control of Superconductivity in a LaAlO3/KTaO3(111) Heterostructure
Siyuan Hong, Yanqiu Sun, Yuan Liu, Yishuai Wang, Yanwu Xie
DOI 10.1103/PhysRevApplied.17.L061001 · Physical Review Applied
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
The oxide interface between LaAlO3 and KTaO3(111) can host an electron gas that condenses into superconductivity at low temperatures. In this work, we demonstrate a local and nonvolatile control of this electron gas using a biased conducting atomic force microscope tip. By scanning the tip, charges can be accumulated on the surface of LaAlO3, which subsequently tune the conduction of the buried LaAlO3/KTaO3(111) interface largely, varying from conducting (superconducting) to insulating states. The tuning effects are stable for >20 h at room temperature. The maximum modulation of carrier density is >8 × 1013/cm2. This result suggests a model system in which rewritable superconducting, normal, and insulating states can be flexibly defined in the same material on demand.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaAlO3/KTaO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | Pressure not reported | midpoint |
| LaAlO3/KTaO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure not reported | midpoint |
| LaAlO3/SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Surface State Effects in High-Tc Superconductors
similarity 0.97S. H. Liu & R. A. Klemm
Source status unknown — claims are unverified
Localized surface states in high-temperature superconductors: Alternative mechanism of zero-bias conductance peaks
similarity 0.96K. V. Samokhin & M. B. Walker
Source status unknown — claims are unverified
Charge redistribution and properties of high-temperature superconductors
similarity 0.96Daniil I. Khomskii & Feodor V. Kusmartsev
Source status unknown — claims are unverified
Test of first-principle calculations of charge transfer and electron-hole distribution in oxide superconductors by precise measurements of structure factors
similarity 0.96Lijun Wu et al.
Source status unknown — claims are unverified
Charge fluctuations between CuO2 layers in high-temperature superconductors
similarity 0.96R. Friedberg & T. D. Lee
Source status unknown — claims are unverified
Effects of strong magnetic fields on pairing fluctuations in high-temperature superconductors
similarity 0.96M. Eschrig et al.
Source status unknown — claims are unverified