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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Heavy-Hole States in Germanium Hut Wires.
    Author: Watzinger H, Kloeffel C, Vukušić L, Rossell MD, Sessi V, Kukučka J, Kirchschlager R, Lausecker E, Truhlar A, Glaser M, Rastelli A, Fuhrer A, Loss D, Katsaros G.
    Journal: Nano Lett; 2016 Nov 09; 16(11):6879-6885. PubMed ID: 27656760.
    Abstract:
    Hole spins have gained considerable interest in the past few years due to their potential for fast electrically controlled qubits. Here, we study holes confined in Ge hut wires, a so-far unexplored type of nanostructure. Low-temperature magnetotransport measurements reveal a large anisotropy between the in-plane and out-of-plane g-factors of up to 18. Numerical simulations verify that this large anisotropy originates from a confined wave function of heavy-hole character. A light-hole admixture of less than 1% is estimated for the states of lowest energy, leading to a surprisingly large reduction of the out-of-plane g-factors compared with those for pure heavy holes. Given this tiny light-hole contribution, the spin lifetimes are expected to be very long, even in isotopically nonpurified samples.
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