RT Journal Article SR Electronic T1 Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions JF Science Advances JO Sci Adv FD American Association for the Advancement of Science SP e1501117 DO 10.1126/sciadv.1501117 VO 2 IS 1 A1 Masuda, Hidetoshi A1 Sakai, Hideaki A1 Tokunaga, Masashi A1 Yamasaki, Yuichi A1 Miyake, Atsushi A1 Shiogai, Junichi A1 Nakamura, Shintaro A1 Awaji, Satoshi A1 Tsukazaki, Atsushi A1 Nakao, Hironori A1 Murakami, Youichi A1 Arima, Taka-hisa A1 Tokura, Yoshinori A1 Ishiwata, Shintaro YR 2016 UL http://advances.sciencemag.org/content/2/1/e1501117.abstract AB For the innovation of spintronic technologies, Dirac materials, in which low-energy excitation is described as relativistic Dirac fermions, are one of the most promising systems because of the fascinating magnetotransport associated with extremely high mobility. To incorporate Dirac fermions into spintronic applications, their quantum transport phenomena are desired to be manipulated to a large extent by magnetic order in a solid. We report a bulk half-integer quantum Hall effect in a layered antiferromagnet EuMnBi2, in which field-controllable Eu magnetic order significantly suppresses the interlayer coupling between the Bi layers with Dirac fermions. In addition to the high mobility of more than 10,000 cm2/V s, Landau level splittings presumably due to the lifting of spin and valley degeneracy are noticeable even in a bulk magnet. These results will pave a route to the engineering of magnetically functionalized Dirac materials.