The ability to carry electric current with zero dissipation is the hallmark of superconductivity1. This very property makes possible such applications ranging from magnetic resonance imaging machines to Large Hadron Collider magnets. But is it indeed the case that superconducting order is incompatible with dissipation? One notable exception, known as vortex flow, takes place in high magnetic fields2. Here we report the observation of dissipative superconductivity in far more basic configurations: superconducting nanowires with superconducting leads. We provide evidence that in such systems, normal current may flow in the presence of superconducting order throughout the wire. The phenomenon is attributed to the formation of a non-equilibrium state, where superconductivity coexists with dissipation, mediated by the so-called Andreev quasiparticles. Besides the promise for applications such as single-photon detectors3, the effect is a vivid example of a controllable non-equilibrium state of a quantum liquid. Thus our findings provide an accessible generic platform to investigate conceptual problems of out-of-equilibrium quantum systems.
At a glance
- 1999). Superconductivity of Metals and Alloys 2nd edn (Westview Press,
- Vortices in high-temperature superconductors. Rev. Mod. Phys. 66, 1125–1388 (1994). et al.
- Picosecond superconducting single-photon optical detector. Appl. Phys. Lett. 79, 705–707 (2001). et al.
- Invited Review Article: Single-photon sources and detectors. Rev. Sci. Instrum. 82, 071101 (2011). , , &
- Superconducting quantum bits. Nature 453, 1031–1042 (2008). &
- Superconducting circuits for quantum information: An outlook. Science 339, 1169–1174 (2013). &
- Experimental determination of the superconducting pairing state in YBCO from the phase coherence of YBCO-Pb dc SQUIDs. Phys. Rev. Lett. 71, 2134–2137 (1993). , , , &
- Pairing symmetry and flux quantization in a tricrystal superconducting ring of Y Ba2Cu3O7−δ. Phys. Rev. Lett. 73, 593–596 (1994). et al.
- Superconducting nanowires as quantum phase-slip junctions. Nature Phys. 2, 169–172 (2006). &
- 2012). Superconductivity in Nanowires: Fabrication and Quantum Transport 1st edn (Wiley,
- 2013). & One-Dimensional Superconductivity in Nanowires 1st edn (Wiley,
- Superconductivity in one dimension. Phys. Rep. 464, 1–70 (2008). , &
- Individual topological tunnelling events of a quantum field probed through their macroscopic consequences. Nature Phys. 5, 503–508 (2009). et al.
- Inherent stochasticity of superconductor–resistor switching behavior in nanowires. Phys. Rev. Lett. 101, 207001 (2008). , &
- Switching currents limited by single phase slips in one-dimensional superconducting Al nanowires. Phys. Rev. Lett. 107, 137004 (2011). et al.
- Observation of individual macroscopic quantum tunneling events in superconducting nanowires. Phys. Rev. B 88, 064511 (2013). &
- Current-induced relaxation of charge imbalance in superconducting phase-slip centers. J. Low Temp. Phys. 46, 555–563 (1982). , &
- Phase-slip centers and nonequilibrium processes in superconducting tin microbridges. J. Low Temp. Phys. 16, 145–167 (1974). , &
- Magnetic-field-induced superconducting state in Zn nanowires driven in the normal state by an electric current. Phys. Rev. Lett. 103, 127002 (2009). , &
- Stabilization of superconductivity by magnetic field in out-of-equilibrium nanowires. Phys. Rev. B 83, 054505 (2011). , , &
- Suppression of superconductivity in zinc nanowires by bulk superconductors. Phys. Rev. Lett. 95, 076802 (2005). et al.
- Influence of a bulk superconducting environment on the superconductivity of one-dimensional zinc nanowires. Phys. Rev. B 74, 014515 (2006). , , , &
- 1990). Current-Induced Nonequilibrium Phenomena in Quasi-One-Dimensional Superconductors 1st edn (Springer,
- Fractional order Shapiro steps in superconducting nanowires. Appl. Phys. Lett. 93, 192505 (2008). , &
- Stochastic and deterministic phase slippage in quasi-one-dimensional superconducting nanowires exposed to microwaves. New J. Phys. 14, 043014 (2012). , , &
- 1982). & Physics and Applications of the Josephson Effect 1st edn (Wiley,
- Frequency-dependent shot noise in long disordered superconductor∖normal-metal∖superconductor contacts. Phys. Rev. Lett. 86, 3112 (2001).
- Generalized diffusion equation for superconducting alloys. Phys. Rev. Lett. 25, 507–510 (1970).
- 2011). Field Theory of Non-Equilibrium Systems (Cambridge Univ. Press,
- Enhancement of the retrapping current of superconducting microbridges of finite length. Phys. Rev. B 85, 024508 (2012). &
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