Atomic-scale mapping of interfacial phonon modes in epitaxial YBa2Cu3O7-δ/(La, Sr)(Al, Ta)O3 thin films: The role of surface phonons

被引：0

作者：

Gonzalez, Joaquin E. Reyes ^{[1
]}

Zhang, Charles ^{[2
]}

Chen, Rainni K. ^{[2
]}

Wei, John Y. T. ^{[2
]}

Lagos, Maureen J. ^{[1
]}

机构：

[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 3N4, Canada

[2] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

来源：

PHYSICAL REVIEW MATERIALS | 2025年 / 9卷 / 07期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

CUO2; PLANE; SUPERCONDUCTIVITY;

D O I：

10.1103/lxqy-m2y9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the behavior of phonons at the epitaxial interface between YBa2Cu3O7-delta thin film and (La, Sr)(Al, Ta)O3 substrate using vibrational electron energy loss spectroscopy. Interfacial phonon modes with different degrees of scattering localization were identified. We find evidence that surface contributions from the surrounding environment can impose additional scattering modulation onto local EELS measurements at the interface. A method to remove those contributions is then used to isolate the phonon information at the interface. This work unveils interfacial phonon modes in a high-Tc cuprate superconductor, that are not accessible with traditional phonon spectroscopy techniques, and provides a method for probing interfacial phonons in complex oxide heterostructures.

引用

页数：8

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