The quantum anomalous Hall(QAH) effect has attracted enormous attention since it can induce topologically protected conducting edge states in an intrinsic insulating material. For practical quantum applications, the m...The quantum anomalous Hall(QAH) effect has attracted enormous attention since it can induce topologically protected conducting edge states in an intrinsic insulating material. For practical quantum applications, the main obstacle is the non-existent room temperature QAH systems, especially with both large topological band gap and robust ferromagnetic order. Here, according to first-principles calculations, we predict the realization of the room temperature QAH effect in a two-dimensional(2D) honeycomb lattice, RuCS_(3) with a non-zero Chern number of C = 1. Especially, the nontrivial topology band gap reaches up to 336 me V for RuCS_(3). Moreover, we find that RuCS_(3) has a large magnetic anisotropy energy(2.065 me V) and high Curie temperature(696 K). We further find that the non-trivial topological properties are robust against the biaxial strain. The robust topological and magnetic properties make RuCS_(3) have great applications in room temperature spintronics and nanoelectronics.展开更多
Background: Studies indicate that the social climate of students’ living situation, plays a role in the drinking habits of those students. Aims: To investigate the social climate of students living in residence halls...Background: Studies indicate that the social climate of students’ living situation, plays a role in the drinking habits of those students. Aims: To investigate the social climate of students living in residence halls in Sweden, and how this corresponds to the students’ alcohol habits. Methods: Baseline data from a randomised controlled trial performed at university halls of residence was used. Instruments included a Residence Hall Climate scale (measuring the environmental climate in residence halls), AUDIT (Alcohol Use Disorders Identification Test), SIP (Short Index of Problems) and self-reported eBAC (estimated Blood Alcohol Level). Multilevel modelling was used to include the possible effects of residence hall and residence hall cluster. Results: Residence halls with high scores for Distance and Expressiveness also had significantly higher alcohol measure scores. Closeness values had no impact on alcohol measurements. Most of the variance of the alcohol outcome measurements was found at individual student level, but significant variance was also found at residence hall level. Conclusions: This study implies that the environment of the residence halls is a factor in the students’ alcohol habits. Changing the social climate might impact the way the students drink.展开更多
基金the Natural Science Foundation of Shandong Province, China (Grant No. ZR2019MA041)the Taishan Scholar Project of Shandong Province, China (Grant No. ts20190939)+1 种基金the National Natural Science Foundation of China (Grant No. 62071200)the Shandong Provincial Natural Science Foundation, China (Grant No. ZR2020QA052)。
文摘The quantum anomalous Hall(QAH) effect has attracted enormous attention since it can induce topologically protected conducting edge states in an intrinsic insulating material. For practical quantum applications, the main obstacle is the non-existent room temperature QAH systems, especially with both large topological band gap and robust ferromagnetic order. Here, according to first-principles calculations, we predict the realization of the room temperature QAH effect in a two-dimensional(2D) honeycomb lattice, RuCS_(3) with a non-zero Chern number of C = 1. Especially, the nontrivial topology band gap reaches up to 336 me V for RuCS_(3). Moreover, we find that RuCS_(3) has a large magnetic anisotropy energy(2.065 me V) and high Curie temperature(696 K). We further find that the non-trivial topological properties are robust against the biaxial strain. The robust topological and magnetic properties make RuCS_(3) have great applications in room temperature spintronics and nanoelectronics.
文摘Background: Studies indicate that the social climate of students’ living situation, plays a role in the drinking habits of those students. Aims: To investigate the social climate of students living in residence halls in Sweden, and how this corresponds to the students’ alcohol habits. Methods: Baseline data from a randomised controlled trial performed at university halls of residence was used. Instruments included a Residence Hall Climate scale (measuring the environmental climate in residence halls), AUDIT (Alcohol Use Disorders Identification Test), SIP (Short Index of Problems) and self-reported eBAC (estimated Blood Alcohol Level). Multilevel modelling was used to include the possible effects of residence hall and residence hall cluster. Results: Residence halls with high scores for Distance and Expressiveness also had significantly higher alcohol measure scores. Closeness values had no impact on alcohol measurements. Most of the variance of the alcohol outcome measurements was found at individual student level, but significant variance was also found at residence hall level. Conclusions: This study implies that the environment of the residence halls is a factor in the students’ alcohol habits. Changing the social climate might impact the way the students drink.
