Sonic valley-Chern insulators
نویسندگان
چکیده
منابع مشابه
Floquet fractional Chern insulators.
We show theoretically that periodically driven systems with short range Hubbard interactions offer a feasible platform to experimentally realize fractional Chern insulator states. We exemplify the procedure for both the driven honeycomb and the square lattice, where we derive the effective steady state band structure of the driven system by using the Floquet theory and subsequently study the in...
متن کاملQuantum Quenches in Chern Insulators.
We explore the nonequilibrium response of Chern insulators. Focusing on the Haldane model, we study the dynamics induced by quantum quenches between topological and nontopological phases. A notable feature is that the Chern number, calculated for an infinite system, is unchanged under the dynamics following such a quench. However, in finite geometries, the initial and final Hamiltonians are dis...
متن کاملRepulsive Casimir effect with Chern insulators.
We theoretically predict that the Casimir force in vacuum between two Chern insulator plates can be repulsive (attractive) at long distances whenever the sign of the Chern numbers characterizing the two plates are opposite (equal). A unique feature of this system is that the sign of the force can be tuned simply by turning over one of the plates or alternatively by electrostatic doping. We calc...
متن کاملRealizing Fractional Chern Insulators with Dipolar Spins
N. Y. Yao1†∗, A. V. Gorshkov2†, C. R. Laumann1,3†, A. M. Läuchli, J. Ye, M. D. Lukin Physics Department, Harvard University, Cambridge, MA 02138, U.S.A. Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA 91125, U.S.A. ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, U.S.A. Institute for Theoretical Physics, University of Innsbr...
متن کاملHigh Spin-Chern Insulators with Magnetic Order
As a topological insulator, the quantum Hall (QH) effect is indexed by the Chern and spin-Chern numbers C and Cspin. We have only Cspin = 0 or ± 1/2 in conventional QH systems. We investigate QH effects in generic monolayer honeycomb systems. We search for spin-resolved characteristic patterns by exploring Hofstadter's butterfly diagrams in the lattice theory and fan diagrams in the low-energy ...
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 B
سال: 2020
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.101.020301