Topological Hall effect induced by chiral fluctuations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>ErMn</mml:mi> <mml:mn>6</mml:mn> </mml:msub> <mml:msub> <mml:mi>Sn</mml:mi> <mml:mn>6</mml:mn> </mml:msub> </mml:mrow> </mml:math>
Kyle Fruhling, Alenna Streeter, Sougata Mardanya, Xiaoping Wang, Priya R. Baral, O. Zaharko, I. I. Mazin, Sugata Chowdhury, William Ratcliff, Fazel Tafti
Abstract
The topological Hall effect can emerge in a material either statically due to the formation of skyrmions or dynamically due to thermal fluctuations. ErMn${}_{6}$Sn${}_{6}$ undergoes a field-induced ferrimagnetic to antiferromagnetic phase transition. At the boundary of this phase transition there is an intermediate phase which is predicted to provide the right environment for the emergence of a significant dynamic topological Hall effect. Therefore, ErMn${}_{6}$Sn${}_{6}$ provides a testbed to investigate the universality of thermal fluctuations as a mechanism of the topological Hall effect.