Unconventional thickness scaling of coherent tunnel magnetoresistance in altermagnets
In conventional ferromagnetic tunnel junctions, the tunnel magnetoresistance (TMR) typically increases with increasing barrier thickness under ballistic tunneling conditions. In contrast, the authors reveal here unconventional scaling behavior in altermagnetic tunnel junctions, where the TMR decreases as the barrier becomes thicker. This trend originates from spin-degenerate transmission channels inherent to altermagnets, which effectively suppress the increase of TMR with increasing barrier thickness.
Authors
- Rui Peng (ORCID: https://orcid.org/0000-0003-2507-4615)
- Ching Hua Lee (ORCID: https://orcid.org/0000-0003-0690-3238)
- Shibo Fang (ORCID: https://orcid.org/0000-0002-8073-5474)
- L. K. Ang (ORCID: https://orcid.org/0000-0003-2811-1194)
- Yee Sin Ang (ORCID: https://orcid.org/0000-0002-1637-1610)
- Jianhua Wang (ORCID: https://orcid.org/0000-0001-8960-8909)
- Qiang Li (ORCID: https://orcid.org/0000-0003-0731-5411)
- Zhijun Yang (ORCID: https://orcid.org/0000-0003-2178-7503)
- Xingyue Yang (ORCID: https://orcid.org/0000-0003-3564-7472)
- Jing Lu (ORCID: https://orcid.org/0009-0007-7144-1398)
Institutions
- Minzu University of China (CN)
- Singapore University of Technology and Design (SG)
- National University of Singapore (SG)
- Tiangong University (CN)
- Peking University (CN)
- University of Wollongong (AU)
- Collaborative Innovation Center of Quantum Matter (CN)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-10-17
- DOI
- https://doi.org/10.1103/2thy-fzzj
- Citations
- 6
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 7.48