Surface-State-Driven Anomalous Hall Effect in Altermagnetic MnTe Films

Published

February 10, 2026

Author(s)

Ling-Jie Zhou, Zhi J. Yan, Hongtao Rong, Yufei Zhao, Pu Xiao, Lok K. Lai, Zhiyuan Xi, Ke Wang, Tibendra Adhikari, Ganesh P. Tiwari, Zhong Lin, Pascal Manuel, Fabio Orlandi, Dmitry Khalyavin, Alexander Grutter, Chao-Xing Liu, Binghai Yan, Cui-Zu Chang

Abstract

Altermagnets have recently emerged as a new class of magnetic materials that combine compensated magnetic order with spin-split electronic band structures. In this work, we employ molecular beam epitaxy (MBE) to grow MnTe thin films with controlled thickness on InP(111)A substrates. By performing angle-resolved photoemission spectroscopy (ARPES) measurements, we observe a large spin splitting of 230 meV for bulk bands well below the Fermi level and identify surface states that cross the Fermi level. Electrical transport measurements reveal that a robust anomalous Hall (AH) effect persists down to 2 K and an AH sign reversal occurs near 175 K. By systematically tuning film thickness, growth conditions, and interfacial structure, we demonstrate that the AH response in MnTe films originates from the Berry curvature of surface states rather than from bulk bands. Our first-principles calculations reveal that this surface-state-driven AH effect is imprinted by the bulk altermagnetic order and remains unchanged for terminations with opposite Mn magnetic orientations. Our results establish a unique surface transport probe of bulk altermagnetism, demonstrate interface engineering as an effective route to generate and control the AH effect in altermagnets, and provide a unified understanding of the AH response in altermagentic MnTe.

Citation

Nature Physics

Pub Type

Journals

Keywords

magnetism, film, altermagnetism, telluride

Citation

Zhou, L. , Yan, Z. , Rong, H. , Zhao, Y. , Xiao, P. , Lai, L. , Xi, Z. , Wang, K. , Adhikari, T. , Tiwari, G. , Lin, Z. , Manuel, P. , Orlandi, F. , Khalyavin, D. , Grutter, A. , Liu, C. , Yan, B. and Chang, C. (2026), Surface-State-Driven Anomalous Hall Effect in Altermagnetic MnTe Films, Nature Physics (Accessed February 27, 2026)