Nodal Brillouin-zone boundary from folding a Chern insulator
نویسندگان
چکیده
منابع مشابه
Electronic excitations near the Brillouin zone boundary of Bi2Sr2CaCu2O8¿d
D. L. Feng,* C. Kim, H. Eisaki, D. H. Lu, A. Damascelli, K. M. Shen, F. Ronning, N. P. Armitage, N. Kaneko, M. Greven, J.-i. Shimoyama, K. Kishio, R. Yoshizaki, G. D. Gu, and Z.-X. Shen Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305 Department of Physics, Fudan University, Shanghai 200433, People’s Republic o...
متن کاملMeasuring Topological Number of a Chern-Insulator from Quench Dynamics
In this letter we address the issue that whether the topological number of a static Hamiltonian can be measured from a dynamical quench process. We focus on a two-band Chern insulator in twodimension, for instance, the Haldane model, whose quantum state is a pseudo-spin on the Bloch sphere. The dynamical process is described by a mapping from the [kx, ky, t] space to the Bloch sphere, character...
متن کاملChern insulator at a magnetic rocksalt interface
Considerable efforts have recently been devoted to the experimental realization of a two-dimensional Chern insulator, i.e., a system displaying a quantum anomalous Hall effect. However, existing approaches such as those based on magnetic doping of topological-insulator thin films have resulted in small band gaps, restricting the effect to low temperatures. We use first-principles calculations t...
متن کاملContinuous Preparation of a Fractional Chern Insulator.
We present evidence of a direct, continuous quantum phase transition between a Bose superfluid and the ν=1/2 fractional Chern insulator in a microscopic lattice model. In the process, we develop a detailed field theoretic description of this transition in terms of the low energy vortex dynamics. The theory explicitly accounts for the structure of lattice symmetries and predicts a Landau forbidd...
متن کاملElectric polarization in a Chern insulator.
We extend the Berry-phase concept of polarization to insulators having a nonzero value of the Chern invariant. The generalization to such Chern insulators requires special care because of the partial occupation of chiral edge states. We show how the integrated bulk current arising from an adiabatic evolution can be related to a difference of bulk polarizations. We also show how the surface char...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2017
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.95.053615