Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 4: Transport: Quantum Dots, Wires, Point Contacts 1 (jointly with HL and TT)
O 4.10: Vortrag
Montag, 11. März 2013, 12:00–12:15, H20
Adiabatic pumping in the quasi-one-dimensional triangle lattice — Michael Schulze1, •Dario Bercioux1, and Daniel F. Urban2,3 — 1Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, 79104 Freiburg, Germany — 2Physikalisches Institut, Albert-Ludwigs-Universität, 79104 Freiburg, Germany — 3Fraunhofer Institute for Mechanics of Materials IWM, Wöhlerstraße 11, 79108 Freiburg, Germany
We analyze the properties of the quasi-one-dimensional triangle lattice emphasizing the occurrence of flat bands and band
touching via the tuning of the lattice hopping parameters and on-site energies [1]. The spectral properties of the infinite
system will be compared with the transmission through a finite piece of the lattice with attached semi-infinite leads.
Furthermore, we investigate the adiabatic pumping [2] properties of such a system:
depending on the transmission through the lattice, this results in nonzero integer charge transfers or transfers that increase linearly with the lattice size.
[1] M. Schulze, D. Bercioux, D. F. Urban, arXiv:1208.6113.
P. W. Brouwer, Phys. Rev. B 58, 10135(R) (1998).