Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 3: Transport: Quantum Dots, Quantum Wires, Point Contacts
TT 3.5: Vortrag
Montag, 20. März 2017, 10:30–10:45, HSZ 201
Noise Properties of a Zeeman-split quantum dot coupled to a helical edge state — •Benedikt Probst1, Pauli Virtanen2, and Patrik Recher1 — 1Institut für Mathematische Physik, TU Braunschweig, 38106 Braunschweig, Germany — 2NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa, Italy
We consider a Zeeman-split quantum dot (QD) containing a single spin 1/2 weakly coupled to a helical Luttinger liquid (HLL) within a generalized master equation approach. The HLL induces a tunable magnetization direction on the QD controlled by an applied bias voltage when the quantization axes of the QD and the HLL are noncollinear [1]. In this talk we present the current fluctuations. To analyse the rich noise behaviour we calculate the g(2)-function and find bunching as well as antibunching of the electrons.
[1] B. Probst, P. Virtanen, and P. Recher, Phys. Rev. B 92, 045430 (2015).