11 Jul 2016
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Watzinger Hannes
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Kloeffel Christoph
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Vukušić Lada
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Rossell Marta D.
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Sessi Violetta
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Kukučka Josip
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Kirchschlager Raimund
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Lausecker Elisabeth
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Truhlar Alisha
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Glaser Martin
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Rastelli Armando
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Fuhrer Andreas
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Loss Daniel
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Katsaros Georgios
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 which is 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. However, this tiny light hole contribution does not
influence the spin lifetimes, which are expected to be very long, even in non
isotopically purified samples.(read more)