Inducing superconducting correlation in quantum Hall edge states
نویسندگان
چکیده
Gil-Ho Lee1, Ko-Fan Huang1, Dmitri K. Efetov2, Di S. Wei1, Sean Hart1, Takashi Taniguchi3, Kenji Watanabe3, Amir Yacoby1, and Philip Kim1,* 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA 2Department of Electrical Engineering, M.I.T., Cambridge, MA 02138 3National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan *Correspondence and requests for materials should be addressed to P.K. (email: [email protected]).
منابع مشابه
خواص ترابردی مغناطیسی واثر هال در نمونه هایGdpr-123
Single phase polycrystalline Gd1-xPrxBa2Cu3O7-δ samples with x=0.05 , 0.10, and 0.15 have been prepared by standard solid state reaction technique and characterized by XRD and SEM analysis. The electrical resistivity, Hall effect and magnetoresistance measurements have been on the samples. The electrical resistivity measurements indicate a reduction of transition temperature (Tc) and an incre...
متن کاملSpin quantum Hall effect in unconventional superconductors
We study the properties of the ‘‘spin quantum Hall fluid’’—a spin phase with quantized spin Hall conductance that is potentially realizable in superconducting systems with unconventional pairing symmetry. A simple realization is provided by a dx22y21idxy superconductor which we argue has a dimensionless spin Hall conductance equal to 2. A theory of the edge states of the dx22y21idxy superconduc...
متن کاملJosephson Current and Noise at a Superconductor/Quantum-Spin-Hall-Insulator/Superconductor Junction
We study junctions between superconductors mediated by the edge states of a quantum-spin-Hall insulator. We show that such junctions exhibit a fractional Josephson effect, in which the current phase relation has a 4π rather than a 2π periodicity. This effect is a consequence of the conservation of fermion parity—the number of electron mod 2—in a superconducting junction and is closely related t...
متن کاملInduced superconductivity in the quantum spin Hall edge
Topological insulators are a newly discovered phase of matter characterized by gapped bulk states surrounded by conducting boundary states1–3. Since their theoretical discovery, these materials have encouraged intense e orts to study their properties and capabilities. Among the most striking results of this activity are proposals to engineer a new variety of superconductor at the surfaces of to...
متن کاملEdge Dynamics in Quantum Hall Bilayers II: Exact Results with Disorder and Parallel Fields
We study edge dynamics in the presence of interlayer tunneling, parallel magnetic field, and various types of disorder for two infinite sequences of quantum Hall states in symmetric bilayers. These sequences begin with the 110 and 331 Halperin states and include their fractional descendants at lower filling factors; the former is easily realized experimentally while the latter is a candidate fo...
متن کامل