SrRuO_(3)is a canonical itinerant ferromagnet,yet its properties in the extreme two-dimensional limit on a(111)crystal plane remain largely unexplored.Here,we demonstrate a complete transformation of its ground state ...SrRuO_(3)is a canonical itinerant ferromagnet,yet its properties in the extreme two-dimensional limit on a(111)crystal plane remain largely unexplored.Here,we demonstrate a complete transformation of its ground state driven by dimensional reduction.As the thickness of(111)-oriented SrRuO_(3)films is reduced to a few unit cells,the system transitions from a metallic ferromagnet to a semiconducting antiferromagnet.This emergent antiferromagnetism is evidenced by a vanishing magnetic remanence and most strikingly,by the appearance of an unconventional twelve-fold anisotropic magnetoresistance.First-principles calculations confirm that an A-type antiferromagnetic order is the stable ground state in the ultrathin limit.Our findings establish(111)dimensional engineering as a powerful route to manipulate correlated electron states and uncover novel functionalities for antiferromagnetic spintronics.展开更多
Recently,van der Waals layered materials,such as MoS2,WS2,MoSe2 and WSe2,have attracted extensive attention due to their unique properties and potential applications in(optoelectronic)electronic devices[1].Similar to ...Recently,van der Waals layered materials,such as MoS2,WS2,MoSe2 and WSe2,have attracted extensive attention due to their unique properties and potential applications in(optoelectronic)electronic devices[1].Similar to graphene,the atoms of van der Waals materials in the layer are connected by covalent bonds,and the van der Waals’force is applied between the layers[2].However,compared with graphene,van der Waals materials exhibit more excellent performance in sensors.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12204521,12250710675,and 12504198)the National Key R&D Program of China(Grant No.2022YFA1403000)。
文摘SrRuO_(3)is a canonical itinerant ferromagnet,yet its properties in the extreme two-dimensional limit on a(111)crystal plane remain largely unexplored.Here,we demonstrate a complete transformation of its ground state driven by dimensional reduction.As the thickness of(111)-oriented SrRuO_(3)films is reduced to a few unit cells,the system transitions from a metallic ferromagnet to a semiconducting antiferromagnet.This emergent antiferromagnetism is evidenced by a vanishing magnetic remanence and most strikingly,by the appearance of an unconventional twelve-fold anisotropic magnetoresistance.First-principles calculations confirm that an A-type antiferromagnetic order is the stable ground state in the ultrathin limit.Our findings establish(111)dimensional engineering as a powerful route to manipulate correlated electron states and uncover novel functionalities for antiferromagnetic spintronics.
基金supported by the National Natural Science Foundation of China(91833301,61427901,61604178 and U1505252)the Guangzhou Science and Technology Program(201607020036)。
文摘Recently,van der Waals layered materials,such as MoS2,WS2,MoSe2 and WSe2,have attracted extensive attention due to their unique properties and potential applications in(optoelectronic)electronic devices[1].Similar to graphene,the atoms of van der Waals materials in the layer are connected by covalent bonds,and the van der Waals’force is applied between the layers[2].However,compared with graphene,van der Waals materials exhibit more excellent performance in sensors.
