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TT: Fachverband Tiefe Temperaturen

TT 1: Topological Insulators 1 (joint session TT/HL)

TT 1.12: Vortrag

Montag, 16. März 2020, 12:30–12:45, HSZ 03

Thermoelectric effects in a helical edge coupled to a quantum magnet — •Peter Silvestrov¹, Piet Brouwer², and Patrik Recher^1,3 — ¹Institute for Mathematical Physics, TU Braunschweig, 38106 Braunschweig, Germany — ²Physics Department and Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany — ³Laboratory for Emerging Nanometrology Braunschweig, 38106 Braunschweig, Germany

We explore the analogy between a helical edge current interacting with a microscopic magnet and the adiabatic quantum motor[1-3], with special emphasis on thermal effects. These include a thermal engine, in which the thermal gradient is converted directly into mechanical work, a device producing an AC current from the temperature gradient, and an electron refrigerator.

[1] Q. Meng, S. Vishveshwara, and T. L. Hughes, Phys. Rev. B 90, 205403 (2014).

[2] L. Arrachea and F. von Oppen, Physica E 74, 596 (2015).

[3] P. G. Silvestrov, P. Recher, and P. W. Brouwer, Phys. Rev. B 93, 205130 (2016).