Article
Physics, Multidisciplinary
Ananda Roy, Hubert Saleur
Summary: Entanglement entropy (EE) contains signatures of many universal properties of conformal field theories (CFTs), especially in the presence of boundaries or defects. This study presents an ab initio analysis of EE for the Ising model with a topological defect, revealing important finite-size corrections due to zero-energy modes.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yuan Fang, Zhongzheng Wu, Guowei Yang, Yuwei Zhang, Weifan Zhu, Yi Wu, Chunyu Guo, Yuke Li, Huiqiu Yuan, Jian-Xin Zhu, Yang Liu, Chao Cao
Summary: The surface electronic structure of the topological Kondo semimetal YbPtBi is investigated using theoretical calculations and experimental measurements. The results reveal a reconstruction of the surface electronic structure due to the valence transition of the lanthanide element, leading to different behaviors at the Yb-terminated and Bi-terminated surfaces.
Article
Multidisciplinary Sciences
Jaemo Jeong, Dongwook Kim, Youngkuk Kim
Summary: This study investigates the topological phase transitions in tetragonal NaZnSb1-xBix driven by the chemical composition x. The research finds that mirror Chern numbers can change without symmetry indicators. First-principles calculations and a simplified low-energy effective model are used to diagnose the consecutive topological phase transitions and highlight the role of spectator Dirac fermions in avoiding symmetry indicators.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Ashley M. Cook, Joel E. Moore
Summary: This article uncovers a new class of multiplicative topological phases using symmetry, which have nontrivial topological properties and can carry current at the edges of the sample. Considerable understanding of these phases has been gained recently by considering additional protecting symmetries, different types of quasiparticles, and systems out of equilibrium. The authors construct a large class of previously unidentified multiplicative topological phases characterized by tensor product Hilbert spaces, and demonstrate their methods by introducing multiplicative topological phases based on Hopf and Chern insulator phases.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hart Goldman, Ramanjit Sohal, Eduardo Fradkin
Summary: Researchers constructed a Fibonacci state of bosons using non-Abelian dualities, and obtained the Fibonacci state by interlayer clustering of composite vortices along with flux attachment.
Article
Quantum Science & Technology
Xiang-Long Yu, Wentao Ji, Lin Zhang, Ya Wang, Jiansheng Wu, Xiong-Jun Liu
Summary: This study introduces the concept of high-order band inversion surfaces for characterizing equilibrium topological phases through far-from-equilibrium quantum dynamics and experimental simulation. By investigating the high-order BISs, it is shown that quantum dynamics can exhibit nontrivial topological patterns during quenching processes, corresponding to and characterizing the equilibrium topological phase. The high-order dynamical bulk-surface correspondence provides new and optimal schemes to detect and simulate topological states.
Article
Physics, Multidisciplinary
Bjorn Sbierski, Elizabeth J. Dresselhaus, Joel E. Moore, Ilya A. Gruzberg
Summary: The study presents extensive numerical results on the phase diagram and criticality of 2D DDF in the unitary class, revealing a critical line at m = 0 with an energy-dependent localization length exponent. The results challenge conjectured relations between different IQHT models.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Jingyuan Zhong, Ming Yang, Zhijian Shi, Yaqi Li, Dan Mu, Yundan Liu, Ningyan Cheng, Wenxuan Zhao, Weichang Hao, Jianfeng Wang, Lexian Yang, Jincheng Zhuang, Yi Du
Summary: Weak topological insulators with tunable topological states are studied using ARPES and first-principles calculations. The authors find signatures of layer-selective quantum spin Hall channels in a candidate weak topological insulator, Bi4Br2I2, which is stacked by three different quantum spin Hall insulators. The energy gap at the crossing points of different Dirac cones, induced by interlayer interaction, enables the tunability of topological edge states. This work offers a perspective for constructing tunable quantized conductance devices for future spintronic applications.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
M. Gomes, Pedro R. S. Gomes, K. Raimundo, Rodrigo Corso B. Santos, A. J. da Silva
Summary: This study derives low-energy effective field theories for the quantum anomalous Hall and topological superconducting phases. The effective actions for both phases contain Chern-Simons terms associated with the U(1) symmetry. The proximity to a conventional superconductor induces pairing potential and leads to the formation of Cooper pairs, driving the system into a topological superconducting phase hosting Majorana fermions.
Article
Physics, Multidisciplinary
Archisman Panigrahi, Vladimir Juricic, Bitan Roy
Summary: The authors introduce a new class of topological materials called projected topological branes, which are holographic images of higher-dimensional topological crystals and exhibit either crystal or aperiodic quasicrystalline structures. These materials inherit the bulk-boundary and bulk-lattice defect correspondences from the parent crystals and provide a realistic approach to harness four and higher-dimensional topological crystals in the three-dimensional world.
COMMUNICATIONS PHYSICS
(2022)
Article
Multidisciplinary Sciences
T. Yokoi, S. Ma, Y. Kasahara, S. Kasahara, T. Shibauchi, N. Kurita, H. Tanaka, J. Nasu, Y. Motome, C. Hickey, S. Trebst, Y. Matsuda
Summary: Recent reports have shown the presence of half-integer thermal quantum Hall conductance in the two-dimensional honeycomb material alpha-RuCl3, even in magnetic fields without out-of-plane components. The measured field-angular variation of the quantized thermal Hall conductance in alpha-RuCl3 has the same sign structure as the topological Chern number of the pure Kitaev spin liquid, indicating that the non-Abelian topological order persists in the presence of non-Kitaev interactions.
Article
Physics, Multidisciplinary
Qianheng Du, Zhixiang Hu, Myung-Geun Han, Fernando Camino, Yimei Zhu, C. Petrovic
Summary: This study presents a comprehensive investigation on the anisotropy and out-of-plane electric transport in Fe3Sn2, a Kagome lattice material. The research reveals the presence of a large topological Hall effect along the c axis and the observation of angular magnetoresistance under different magnetic phases.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Morten Amundsen, Vladimir Juricic
Summary: This study demonstrates that crystal defects can host topological superconductivity and suggests the possibility of utilizing defect platforms for quantum information technology.
COMMUNICATIONS PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jun Zhang, Ye-Ping Jiang, Xu-Cun Ma, Qi-Kun Xue
Summary: In this study, we visualize the trapping of topological surface states in circular n-p junctions on the top surface of the seven-quintuple-layer three dimensional topological insulator Sb2Te3 epitaxial films. The trapped resonances show field-induced splittings between degenerate time-reversal-symmetric states, which can be attributed to Berry-phase switch. The successful trapping and observation of Berry-phase switch provide a rich platform for developing TI-based quantum devices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Aurelien Fabre, Jean-Baptiste Bouhiron, Tanish Satoor, Raphael Lopes, Sylvain Nascimbene
Summary: This article discusses the research on the quantum Hall effect in two-dimensional electron gases. It explains Laughlin's thought experiment and the milestone experiment conducted using ultracold gas of dysprosium atoms to demonstrate the nontrivial topology of quantum Hall insulators.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
G. Mustafa, S. K. Maurya, Saibal Ray, Faisal Javed
Summary: In this study, we investigate the geometry of wormholes in the framework of general relativity and explore how quantum wave dark matter affects the dynamical configuration of the shell surrounding the wormhole. By using specific shape functions and introducing quantum wave dark matter, we obtain reasonable wormhole solutions and observe its effects on the stability of the shell.
Article
Physics, Multidisciplinary
Pritha Dolai, Christian Maes
Summary: Calorimetry for equilibrium systems aims to determine the energy levels' occupation and distribution by measuring thermal response, while nonequilibrium versions provide additional information on the dynamical accessibility of these states. Using calculations on a driven exclusion process, it is confirmed that a fermionic nonequilibrium steady state with exact computation of specific heat can be achieved. The divergence at zero temperature occurs when the Fermi energy and the kinetic barrier for loading and emptying are approximately equal. Additionally, a stable low temperature regime of negative specific heat appears when the kinetic barrier is density-dependent, indicating an anti-correlation between the stationary occupation's temperature-dependence and excess heat.
Article
Physics, Multidisciplinary
F. F. Nascimento, V. B. Bezerra, J. M. Toledo
Summary: We obtained the metric of the Hayward black hole surrounded by a cloud of strings, and analyzed the effects of the string cloud on the regularity of the solution and the energy conditions. Various aspects such as horizons, geodesics, effective potential, and thermodynamics were investigated. We compared the obtained results with the literature corresponding to the Hayward black hole without a string cloud.