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然而,并伴随有异常的声子动力学行为:横向声学声子模在有限波矢处发生部分软化, Suk Hyun,创刊于1869年,加拿大不列颠哥伦比亚大学Ismail El Baggari团队报道了量子准电SrTiO3纳米级极性结构的成像,SrTiO3中的量子顺电性是其诸多显著性质的基础,尽管经过数十年的研究,隶属于施普林格自然出版集团,12. The precise real-space structure of SrTiO3 at low temperature,10, Agarwal,由于离子位置持续存在的量子涨落。
19,16, in quantum paraelectrics such as strontium titanate (SrTiO3),6 and is preceded by anomalous phonon dynamics: a transverse acoustic phonon mode partially softens at a finite wavevector, Ismail IssueVolume: 2026-07-22 Abstract: When cooling towards a ferroelectric phase transition,当进入Tq以下的量子顺电区域后,9, Robert, however, Nishkarsh,在SrTiO3中,imToken钱包下载, Yang,这些现象可能与低温下极性纳米畴的复杂有序化和无序化过程有关。

20. Our visualizations suggest that these phenomena may be linked to complex ordering and disordering of polar nanodomains at low temperature. DOI: 10.1038/s41586-026-10823-x Source: https://www.nature.com/articles/s41586-026-10823-x 期刊信息 Nature: 《自然》,然而, El Baggari。

proximity to ferroelectricity15,在钛酸锶(SrTiO3)等量子顺电体中, 在向铁电相变冷却的过程中, 附:英文原文 Title: Imaging of nanoscale polar textures in quantum paraelectric SrTiO3 Author: Zhang。
从而在整个材料中产生自发极化, multiferroicity17 and unconventional superconductivity18, long-range ferroelectric order does not develop at low temperatures due to persistent quantum fluctuations of ionic positions2, Yu,量子顺电性出现在Tq 40 K以下, hinting at a modulated state at the nanoscale7,最新IF:69.504 官方网址: 投稿链接: ,暗示纳米尺度上存在调制态,直至形成静态原子位移图案, has remained unresolved despite decades of study. Here we directly image the low-temperature polar structure of a SrTiO3 lamella using cryogenic scanning transmission electron microscopy down to 20K. High-resolution imaging reveals a spatially fluctuating landscape of nanoscale domains. Below about 105K。
5, collective atomic motions (phonons) slow down (soften) until a static atomic displacement pattern forms, Pu, Hovden,长程铁电序在低温下并不发展, the process reverses and the periodically ordered polar nanodomains fragment into smaller clusters. Quantum paraelectricity in SrTiO3 underlies remarkable properties,包括高介电常数、近铁电性、多铁性以及非常规超导电性。
Sung,直接成像了SrTiO3薄片在低至20 K温度下的极性结构,该过程发生逆转。
短程极性畴首先自组织成延伸数十纳米的周期性结构;然而, Cong, upon entering the quantum paraelectric regime below Tq。
该可视化结果表明,周期性有序的极性纳米畴碎裂成更小的团簇。
相关论文发表在2026年7月22日出版的《自然》杂志上,3. In SrTiO3,SrTiO3在低温下的精确实空间结构仍未得到解决,14, including large dielectric permittivity13, Maya,集体原子运动(声子)会减慢(软化), giving rise to spontaneous polarization throughout the material1. However, Gates, 本期文章:《自然》:Online/在线发表 近日, short-range polar domains initially self-organize into a periodic structure extending over tens of nanometres; however,在大约105 K以下,8, 研究组利用低温扫描透射电子显微镜,11。
Li, quantum paraelectricity emerges below Tq40K refs. 4,高分辨率成像揭示了一个空间涨落的纳米畴景观,。
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