Anomalous Magnetic Susceptibility and Hall Effect from Valley Degrees of Freedom
Tianyi Cai, Wang Yao, Shengyuan A. Yang, Junren Shi, Qian Niu
TL;DR
This paper investigates the magnetic and transport behaviors of epitaxial graphene, highlighting enhanced magnetic susceptibility linked to valley magnetic moments and an anomalous Hall effect arising from valley-dependent Berry phase effects.
Contribution
It introduces the concept of valley degrees of freedom influencing magnetic susceptibility and Hall effect in graphene, providing new insights into valleytronics.
Findings
Enhanced magnetic susceptibility related to valley magnetic moments
Anomalous Hall effect due to valley-dependent Berry phase
Valley degrees of freedom significantly affect graphene's magnetic and transport properties
Abstract
We study the magnetic and transport properties of epitaxial graphene films in this letter. We predict enhanced signal of magnetic susceptibility and relate it to the intrinsic valley magnetic moments. There is also an anomalous contribution to the ordinary Hall effect, which is due to the valley dependent Berry phase or valley-orbit coupling.
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Taxonomy
TopicsGraphene research and applications · Quantum and electron transport phenomena · Quantum Computing Algorithms and Architecture