TY - JOUR
T1 - Cubic 3D Chern photonic insulators with orientable large Chern vectors
AU - Devescovi, Chiara
AU - García-Díez, Mikel
AU - Robredo, Iñigo
AU - Blanco de Paz, María
AU - Lasa-Alonso, Jon
AU - Bradlyn, Barry
AU - Mañes, Juan L.
AU - G. Vergniory, Maia
AU - García-Etxarri, Aitzol
N1 - The authors dedicate this work to the memory of their beloved colleague and friend, Prof. Alexey A. Soluyanov, who passed away on October 26, 2019. A.G.E., C.D. and M.B.P. acknowledge support from the Spanish Ministerio de Ciencia e Innovación (PID2019-109905GA-C2) and from Eusko Jaurlaritza (IT1164-19, KK-2019/00101 and KK-2021/ 00082). M.G.D., I.R. and M.G.V. acknowledge the Spanish Ministerio de Ciencia e Innovacion (grant PID2019-109905GB-C21). J.L.A. acknowledges support from the Spanish Ministerio de Ciencia e Innovación (PID2019-109905GA-C2). The work of B.B. is supported by the Air Force Office of Scientific Research under award number FA9550-21-1-0131. C.D. acknowledges financial support from the MICIU through the FPI PhD Fellowship CEX2018-000867-S-19-1. The work of J.L.M. has been supported by Spanish Science Ministry grant PGC2018-094626-BC21 (MCIU/AEI/FEDER, EU) and Basque Government grant IT979-16. A.G.E. and M. G. V. acknowledge funding from Programa Red Guipuzcoana de Ciencia, Tecnología e Innovación 2021 (Grant Nr. 2021-CIEN-000070-01. Gipuzkoa Next).
PY - 2021/12
Y1 - 2021/12
N2 - Time Reversal Symmetry (TRS) broken topological phases provide gapless surface states protected by topology, regardless of additional internal symmetries, spin or valley degrees of freedom. Despite the numerous demonstrations of 2D topological phases, few examples of 3D topological systems with TRS breaking exist. In this article, we devise a general strategy to design 3D Chern insulating (3D CI) cubic photonic crystals in a weakly TRS broken environment with orientable and arbitrarily large Chern vectors. The designs display topologically protected chiral and unidirectional surface states with disjoint equifrequency loops. The resulting crystals present the following characteristics: First, by increasing the Chern number, multiple surface states channels can be supported. Second, the Chern vector can be oriented along any direction simply changing the magnetization axis, opening up larger 3D CI/3D CI interfacing possibilities as compared to 2D. Third, by lowering the TRS breaking requirements, the system is ideal for realistic photonic applications where the magnetic response is weak.
AB - Time Reversal Symmetry (TRS) broken topological phases provide gapless surface states protected by topology, regardless of additional internal symmetries, spin or valley degrees of freedom. Despite the numerous demonstrations of 2D topological phases, few examples of 3D topological systems with TRS breaking exist. In this article, we devise a general strategy to design 3D Chern insulating (3D CI) cubic photonic crystals in a weakly TRS broken environment with orientable and arbitrarily large Chern vectors. The designs display topologically protected chiral and unidirectional surface states with disjoint equifrequency loops. The resulting crystals present the following characteristics: First, by increasing the Chern number, multiple surface states channels can be supported. Second, the Chern vector can be oriented along any direction simply changing the magnetization axis, opening up larger 3D CI/3D CI interfacing possibilities as compared to 2D. Third, by lowering the TRS breaking requirements, the system is ideal for realistic photonic applications where the magnetic response is weak.
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U2 - 10.1038/s41467-021-27168-w
DO - 10.1038/s41467-021-27168-w
M3 - Article
C2 - 34921142
AN - SCOPUS:85121499235
SN - 2041-1723
VL - 12
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 7330
ER -