Superconducting Quantum Oscillations and Anomalous Negative Magnetoresistance in a Honeycomb Nanopatterned Oxide Interface Superconductor
Yishuai Wang, Siyuan Hong, Wenze Pan, Yi Zhou, Yanwu Xie
DOI 10.1103/PhysRevX.15.011006 · Physical Review X
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 extremely low superfluid density and unprecedented tunability of oxide interface superconductors provide an ideal platform for studying fluctuations in two-dimensional superconductors. In this work, we fabricate an LaAlO3/KTaO3 interface superconductor patterned with a nanohoneycomb array of insulating islands. Little-Parks-like magnetoresistance oscillations are observed, which are dictated by the superconducting flux quantum h/2e. Moreover, an anomalous negative magnetoresistance (ANMR) appears under a weak magnetic field, suggesting magnetic-field-enhanced superconductivity. By examining their dependences on temperature, measurement current, and electrical gating, we conclude that both phenomena are associated with superconducting order parameter: The h/2e oscillations provide direct evidence of Cooper-pair transport, and the ANMR is interpreted as a consequence of multiple connected narrow superconducting paths with strong fluctuations.
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. | 1.28 | Pressure not reported | midpoint |
| LaAlO3/KTaO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.05 | Pressure not reported | midpoint |
Similar papers
Superconducting quantum oscillations and anomalous negative magnetoresistance in a honeycomb nanopatterned oxide interface superconductor
similarity 1.00Yishuai Wang et al. · 2025 · arXiv:2504.10912
Source status unknown — claims are unverified
Electronic Nematicity in Interface Superconducting LAO/KTO(111)
similarity 0.93X. B. Cheng et al.
Source status unknown — claims are unverified
Absence of localized 5d1 electrons in KTaO3 interface superconductors
similarity 0.92Xinqiang Cai et al.
Source status unknown — claims are unverified
Magnetoresistance Oscillations in Few-Layer NbSe2 in Superconducting Fluctuation Regime
similarity 0.90Xiaolong Yin et al.
Source status unknown — claims are unverified
Gate tunability of the superconducting state at the EuO/KTaO3 (111) interface
similarity 0.90Weiliang Qiao et al.
Source status unknown — claims are unverified
Oscillatory magnetoresistance in nanopatterned superconducting La1.84Sr0.16CuO4 films
similarity 0.89I. Sochnikov et al.
Source status unknown — claims are unverified