%0 Journal Article %1 PhysRevB.106.L081410 %A Li, Chang-An %A Zhang, Song-Bo %A Budich, Jan Carl %A Trauzettel, Björn %D 2022 %I American Physical Society %J Phys. Rev. B %K a %N 8 %P L081410 %R 10.1103/PhysRevB.106.L081410 %T Transition from metal to higher-order topological insulator driven by random flux %U https://link.aps.org/doi/10.1103/PhysRevB.106.L081410 %V 106 %X Random flux is commonly believed to be incapable of driving full metal-insulator transitions in noninteracting systems. Here we show that random flux can after all induce a full metal–band insulator transition in the two-dimensional Su-Schrieffer-Heeger model. Remarkably, we find that the resulting insulator can be an extrinsic higher-order topological insulator with zero-energy corner modes in proper regimes, rather than a conventional Anderson insulator. Employing both level statistics and finite-size scaling analysis, we characterize the metal–band insulator transition and numerically extract its critical exponent as ν=2.48±0.08. To reveal the physical mechanism underlying the transition, we present an effective band structure picture based on the random-flux averaged Green's function.

@article{PhysRevB.106.L081410, abstract = {Random flux is commonly believed to be incapable of driving full metal-insulator transitions in noninteracting systems. Here we show that random flux can after all induce a full metal–band insulator transition in the two-dimensional Su-Schrieffer-Heeger model. Remarkably, we find that the resulting insulator can be an extrinsic higher-order topological insulator with zero-energy corner modes in proper regimes, rather than a conventional Anderson insulator. Employing both level statistics and finite-size scaling analysis, we characterize the metal–band insulator transition and numerically extract its critical exponent as ν=2.48±0.08. To reveal the physical mechanism underlying the transition, we present an effective band structure picture based on the random-flux averaged Green's function.}, added-at = {2023-10-06T15:27:33.000+0200}, author = {Li, Chang-An and Zhang, Song-Bo and Budich, Jan Carl and Trauzettel, Björn}, biburl = {https://www.bibsonomy.org/bibtex/280f1fab51636db35691fc482119d8bd4/ctqmat}, day = 29, description = {Phys. Rev. B 106, L081410 (2022) - Transition from metal to higher-order topological insulator driven by random flux}, doi = {10.1103/PhysRevB.106.L081410}, interhash = {902d080e0711fc93544af79362d33b26}, intrahash = {80f1fab51636db35691fc482119d8bd4}, journal = {Phys. Rev. B}, keywords = {a}, month = {08}, number = 8, numpages = {7}, pages = {L081410}, publisher = {American Physical Society}, timestamp = {2023-10-06T15:27:33.000+0200}, title = {Transition from metal to higher-order topological insulator driven by random flux}, url = {https://link.aps.org/doi/10.1103/PhysRevB.106.L081410}, volume = 106, year = 2022 }