The magnetic properties of single-crystal EuTiO3 are suggestive of nanoscale disorder below its cubic-tetragonal phase transition. We demonstrate that electric field cooling acts to restore monocrystallinity, thus confirming that emergent structural disorder is an intrinsic low-temperature property of this material. Using torque magnetometry, we deduce that tetragonal EuTiO3 enters an easy-axis antiferromagnetic phase at 5.6 K, with a first-order transition to an easy-plane ground state below 3 K. Our data is reproduced by a 3D anisotropic Heisenberg spin model.
Intrinsic quantum disorder in Yb2Ti2O7 and the quantum S=1/2 pyrochlore phase diagram
The University of Tennessee, Knoxville（田纳西大学诺克斯维尔分校）；St. Bonaventure University（圣博纳文图尔大学）；Oak Ridge National Laboratory（橡树岭国家实验室）；University of Windsor（温莎大学）；National High Magnetic Field Laboratory（国家高磁场实验室）；Florida State University（佛罗里达州立大学）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；Johns Hopkins University（约翰斯·霍普金斯大学）
Bulk Superconductivity driven by Disorder-Induced Delocalization in 4Hb-Ta(S$_{1-x}$Se$_x$)$_2$
Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；University of California, Berkeley（加州大学伯克利分校）；University of Illinois Urbana-Champaign（伊利诺伊大学厄巴纳-香槟分校）；Technion（以色列理工学院）
Designs without disorder: unitary $k$-designs from a single-site bulk defect
University of Geneva（日内瓦大学）；Vrije Universiteit Brussel (VUB)（布鲁塞尔自由大学）；RIKEN Centre for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS)（理化学研究所跨学科理论与数学科学中心）
