Asset Details
Do you wish to reserve the book?
Anisotropic Charge Diffusion in Polar‐Layered Oxides for Ultralong Charge Retention
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Anisotropic Charge Diffusion in Polar‐Layered Oxides for Ultralong Charge Retention
Do you wish to request the book?
Anisotropic Charge Diffusion in Polar‐Layered Oxides for Ultralong Charge Retention
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Anisotropic Charge Diffusion in Polar‐Layered Oxides for Ultralong Charge Retention
2026
Overview
Persistent surface charge retention in dielectric oxides is critical for a wide range of electronic and energy applications, including charge‐trapping memory devices, triboelectric generators, and supercapacitors. Since charge retention is intrinsically governed by charge diffusion, understanding and controlling the underlying diffusion mechanisms in charge‐storing materials remain significant challenges. Here, ultralong charge retention in epitaxially grown LaAlO3 (LAO) thin films is reported, enabled by anisotropic charge diffusion. The surface accumulation of oxygen vacancies, driven by the internal polar field, effectively suppresses out‐of‐plane electron hopping, allowing ≈90.9% of the initially injected charges to remain on the LAO surface after 180 h, with stable retention persisting for weeks or longer. Time‐resolved Kelvin probe force microscopy and finite‐difference simulations consistently reveal that this retention enhancement arises from diffusion anisotropy induced by surface‐localized defect states in LAO, rather than by isotropic ionic migration. These results provide an effective strategy for designing high‐performance charge storage materials based on polar‐layered oxides, paving the way for durable surface charge‐based electronic and energy devices. Anisotropic charge diffusion in epitaxially grown LAO thin films is reported, which enables ultralong charge retention. Surface‐accumulated oxygen vacancies effectively suppress out‐of‐plane electron hopping, allowing ≈90.9% of the surface charges to remain after a few weeks or longer. Kelvin probe force microscopy and finite‐difference simulations consistently support this mechanism for stable charge retention.
Publisher
John Wiley & Sons, Inc,Wiley
Subject
