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000022767 084__ $$2WoS$$aPhysics, Multidisciplinary
000022767 1001_ $$0P:(DE-HGF)0$$aSickinger, H.$$b0
000022767 245__ $$aExperimental evidence of a phi-Josephson Junction
000022767 260__ $$aCollege Park, Md.$$bAPS$$c2012
000022767 300__ $$a107002
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000022767 440_0 $$04925$$aPhysical Review Letters$$v109$$x0031-9007$$y10
000022767 500__ $$3POF3_Assignment on 2016-02-29
000022767 500__ $$aWe acknowledge financial support by the German Israeli Foundation (Grant No. G-967-126.14/2007) and DFG (via SFB/TRR-21, project A5 as well via project Go-1106/3). H. S. gratefully acknowledges support by the Evangelisches Studienwerk e. V. Villigst.
000022767 520__ $$aWe demonstrate experimentally the existence of Josephson junctions having a doubly degenerate ground state with an average Josephson phase psi = +/-phi. The value of phi can be chosen by design in the interval 0 < phi < pi. The junctions used in our experiments are fabricated as 0-pi Josephson junctions of moderate normalized length with asymmetric 0 and pi regions. We show that (a) these phi Josephson junctions have two critical currents, corresponding to the escape of the phase c from -phi and +phi states, (b) the phase psi can be set to a particular state by tuning an external magnetic field, or (c) by using a proper bias current sweep sequence. The experimental observations are in agreement with previous theoretical predictions.
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000022767 7001_ $$0P:(DE-HGF)0$$aLipman, A.$$b1
000022767 7001_ $$0P:(DE-Juel1)VDB59925$$aWeides, M.$$b2$$uFZJ
000022767 7001_ $$0P:(DE-HGF)0$$aMints, R.G.$$b3
000022767 7001_ $$0P:(DE-Juel1)VDB3107$$aKohlstedt, H.$$b4$$uFZJ
000022767 7001_ $$0P:(DE-HGF)0$$aKoelle, D.$$b5
000022767 7001_ $$0P:(DE-HGF)0$$aKleiner, R.$$b6
000022767 7001_ $$0P:(DE-HGF)0$$aGoldobin, E.$$b7
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000022767 8567_ $$uhttp://dx.doi.org/10.1103/PhysRevLett.109.107002
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