Jimmy A. Hutasoit

Single-Fluxon controlled resistance switching in centimeter-long superconducting Gallium-Indium eutectic nanowires

The ability to manipulate a single quantum object, such as a single electron or a single spin, to induce a change in a macroscopic observable lies at the heart of nanodevices of the future. We report an experiment wherein a single superconducting flux quantum, or a fluxon, can be exploited to switch the resistance of a nanowire between two discrete values. The experimental geometry consists of centimeter-long nanowires of superconducting Ga-In eutectic, with spontaneously formed Ga nanodroplets along the length of the nanowire. The nonzero resistance occurs when a Ga nanodroplet traps one or more superconducting fluxons, thereby driving a Josephson weak-link created by a second nearby Ga nanodroplet normal. The fluxons can be inserted or flipped by careful manipulation of the magnetic field or temperature to produce one of many metastable states of the system.

Quench dynamics of fermion-parity switches in a Josephson junction

A Josephson junction may be driven through a transition where the superconducting condensate favors an odd over an even number of electrons. At this switch in the ground-state fermion parity, an Andreev bound state crosses through the Fermi level, producing a zero-mode that can be probed by a point contact to a grounded metal. We calculate the time-dependent charge transfer between superconductor and metal for a linear sweep through the transition. One single quasiparticle is exchanged with charge

Un-Fermi Liquids: Unparticles in Strongly Correlated Electron Matter

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Induced spin texture in semiconductor/topological insulator heterostructures

depending on the coupling energies

Superconducting dome from holography

gamma_1,gamma_2

Topological nematic phase in Dirac semimetals

of the metal to the Majorana operators of the zero-mode. For a single-channel point contact,

Topologically protected charge transfer along the edge of a chiral p -wave superconductor

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Weyl fermions induced magnon electrodynamics in a Weyl semimetal

equals the electron charge

Collective excitations of a system of coupled relativistic and nonrelativistic two-dimensional electron gases

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Role of interedge tunneling in localizing Majorana zero modes at the ends of quasi-one-dimensionalp+ipsystems

in the adiabatic limit of slow driving, while in the opposite quenched limit