.png){kind=icon}
返回
Higher-order topological quantum paramagnets
.png){kind=icon}
OA
AI
DOI：10.1103/PhysRevB.105.L020403.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Quantum paramagnets are strongly correlated phases of matter where competing interactions frustrate magnetic order down to zero temperature. In certain cases, quantum fluctuations instead induce topological order, supporting fractionalized quasiparticles. In this Letter, we investigate paradigmatic spin models and show how magnetic frustration can also give rise to higher-order topological properties. We first study the frustrated Heisenberg model in a square lattice, where a plaquette valence bond solid appears through the spontaneous breaking of translational invariance. Despite the amount of effort that has been devoted to study this phase, its topological nature has so far been overlooked. By means of tensor network simulations, we establish how such a state belongs to a higher-order symmetry-protected topological phase, where long-range plaquette order and nontrivial topology coexist. Through this interplay, we uncover excitations that would be absent otherwise, such as cornerlike bulk states bound to dynamical topological defects. Finally, we demonstrate how this higher-order topological quantum paramagnet is also induced by dipolar interactions, indicating the possibility to directly observe this phase using atomic quantum simulators.
Keyword:
NEAREST-NEIGHBOR INTERACTION
EXCHANGE INTERACTIONS
MATTER
REALIZATION
INSULATOR
GASES
PHASE
ATOMS
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
机构
引用论文
Plaquette valence-bond crystal in the frustrated Heisenberg quantum antiferromagnet on the square lattice.png)
PHYSICAL REVIEW BOAAI
PHYSICAL REVIEW BIF3.7
OAAI分享收藏Shift Insulators: Rotation-Protected Two-Dimensional Topological Crystalline InsulatorsPHYSICAL REVIEW X
OAAI
PHYSICAL REVIEW XIF15.7
OAAI分享收藏分享收藏分享收藏
查看更多内容