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南京大学/厦门大学/中国人民大学,最新Nature Materials!

  • 2026-05-30 04:52:08
南京大学/厦门大学/中国人民大学,最新Nature Materials!

背景介绍

随着大数据、机器学习与科学计算快速发展,信息单元正朝着极小尺寸、多态存储、概率遍历三大方向演进,以突破集成密度与算力瓶颈。现有存储 / 计算单元难以同时兼顾三者:单原子 / 分子器件尺寸极小但多态可控性弱;忆阻器等多态器件概率调控精度不足;传统概率比特(p-bit)依赖磁隧道结、磁斯格明子等,存在尺寸偏大、能耗高、规模化难等问题。

内嵌富勒烯团簇(如 Sc2C2@C88)具备碳笼保护、内部构型可调、多稳态电导特性,为构建超紧凑多级 p-bit 提供了理想平台,但此前尚未实现随机且可控的多级电导切换及概率计算应用。

南京大学物理学院、原子制造研究院宋凤麒、张敏昊团队与厦门大学谢素原、谭元植团队,中国人民大学季威、王聪团队等人《Nature Materials》上发表了题为“A Sc2C2@C88-cluster-based ultra-compact multilevel probabilistic bit for matrix multiplication”的研究论文。

本文亮点

1.超紧凑多级 p-bit 新突破:首次在单个<1 nm 的 Sc2C2@C88团簇中实现随机且可控的多级电导态切换,生成真随机序列自相关系数置信区间 ≤±0.02,随机性质量优异。

2.概率精准调控:通过电压调控电导态概率分布,实现0–1 连续可调,成功完成整数551 质因数分解(19×29),验证概率计算可行性。

3.单器件矩阵乘法:基于马尔可夫链态转移模型,单个 Sc2C2@C88器件完成4×4 矩阵乘法,最大误差 <0.05、平均误差 <0.03,远超传统忆阻器阵列效率。

4.物理机制阐明:理论计算揭示电场调控团簇内部构型重排,通过能级调谐 + 势垒调控驱动多级稳态切换,为分子级概率器件设计提供理论支撑。

图文导读

图1:Sc2C2@C88团簇器件单电子输运

图2:多级电导态随机切换

图3:多级电导态可控调控与质因数分解

图4:高精度矩阵乘法

图5:电场调控的丰富能量景观

结论

本文以Sc2C2@C88团簇为核心,构建了<1 nm 超紧凑多级概率比特,实现随机且可控的多级电导态切换与高精度概率计算;单个 Sc2C2@C88团簇在电场驱动下呈现 3–4 个离散电导态,随机序列随机性质量优异,态概率可 0–1 连续调控;基于多级 p-bit 成功实现整数质因数分解与 4×4 矩阵乘法,单器件完成传统阵列级运算,效率显著提升;理论计算阐明电场调控团簇内部构型重排的物理机制,为分子级概率器件、神经形态计算提供全新范式,推动超紧凑智能电子器件发展。

文献解读

A Sc2C2@C88-cluster-based ultra-compact multilevel probabilistic bit for matrix multiplication.Nature Materials.

DOI:10.1038/s41563-026-02609-3

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  1. CONNECT:[ UseTime:0.000989s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001582s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003566s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002776s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001439s ]
  6. SELECT * FROM `set` [ RunTime:0.000644s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001573s ]
  8. SELECT * FROM `article` WHERE `id` = 565528 LIMIT 1 [ RunTime:0.001085s ]
  9. UPDATE `article` SET `lasttime` = 1780405574 WHERE `id` = 565528 [ RunTime:0.039454s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.009070s ]
  11. SELECT * FROM `article` WHERE `id` < 565528 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001275s ]
  12. SELECT * FROM `article` WHERE `id` > 565528 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001301s ]
  13. SELECT * FROM `article` WHERE `id` < 565528 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001659s ]
  14. SELECT * FROM `article` WHERE `id` < 565528 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001436s ]
  15. SELECT * FROM `article` WHERE `id` < 565528 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003345s ]
0.180607s