Wave packet dynamics of Bogoliubov quasiparticles: quantum metric effects

Autor:	Liang, Long, Peotta, Sebastiano, Harju, Ari, Törmä, Päivi
Rok vydání:	2017
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. B 96, 064511 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.96.064511
Popis:	We study the dynamics of the Bogoliubov wave packet in superconductors and calculate the supercurrent carried by the wave packet. We discover an anomalous contribution to the supercurrent, related to the quantum metric of the Bloch wave function. This anomalous contribution is most important for flat or quasiflat bands, as exemplified by the attractive Hubbard models on the Creutz ladder and sawtooth lattice. Our theoretical framework is general and can be used to study a wide variety of phenomena, such as spin transport and exciton transport. Comment: Updated version, 16 pages, 5 figures, accepted by PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1705.04542 Zobrazit plný text záznamu View this record from Arxiv