Zobrazeno 1 - 10
of 2 850
pro vyhledávání: '"Wegscheider, W."'
We observed magnetocapacitance oscillations in InAs/GaSb quantum wells separated by a $20$\,nm AlSb middle barrier. By realizing independent ohmic contacts for electrons in InAs and holes in the GaSb layer, we found an out-of-plane oscillatory respon
Externí odkaz:
http://arxiv.org/abs/2404.16419
Autor:
Bal, M. E., Cheah, E., Lei, Z., Schott, R., Lehner, C. A., Engelkamp, H., Wegscheider, W., Zeitler, U.
We have characterized the electronic properties of a high-mobility two-dimensional electron system in modulation doped InAsSb quantum wells and compare them to InSb quantum wells grown in a similar fashion. Using temperature-dependent Shubnikov-de Ha
Externí odkaz:
http://arxiv.org/abs/2312.09704
Autor:
Coraiola, M., Svetogorov, A. E., Haxell, D. Z., Sabonis, D., Hinderling, M., Kate, S. C. ten, Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Cuevas, J. C., Belzig, W., Nichele, F.
Publikováno v:
ACS Nano 18, 9221-9231 (2024)
We investigate the direction-dependent switching current in a flux-tunable four-terminal Josephson junction defined in an InAs/Al two-dimensional heterostructure. The device exhibits the Josephson diode effect, with switching currents that depend on
Externí odkaz:
http://arxiv.org/abs/2312.04415
Autor:
Hinderling, M., Kate, S. C. ten, Haxell, D. Z., Coraiola, M., Paredes, S., Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Sabonis, D., Nichele, F.
Publikováno v:
PRX Quantum 5, 030337 (2024)
Properties of superconducting devices depend sensitively on the parity (even or odd) of the quasiparticles they contain. Encoding quantum information in the parity degree of freedom is central in several emerging solid-state qubit architectures. Yet,
Externí odkaz:
http://arxiv.org/abs/2307.06718
Autor:
Coraiola, M., Haxell, D. Z., Sabonis, D., Hinderling, M., Kate, S. C. ten, Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Nichele, F.
Publikováno v:
Phys. Rev. X 14, 031024 (2024)
Harnessing spin and parity degrees of freedom is of fundamental importance for the realization of emergent quantum devices. Nanostructures embedded in superconductor--semiconductor hybrid materials offer novel and yet unexplored routes for addressing
Externí odkaz:
http://arxiv.org/abs/2307.06715
Autor:
Marty, C., Reichl, C., Parolo, S., Grandt-Ionita, I., Scharnetzky, J., Dietsche, W., Wegscheider, W.
We observe nearly vanishing Hall resistances for integer filling factors in a counterflow (CF) experiment on a density balanced 2D bilayer system. Filling factor dependent equilibration lengths demonstrate enhanced 1D coupling via edge-channels. Due
Externí odkaz:
http://arxiv.org/abs/2307.04174
Autor:
Haxell, D. Z., Coraiola, M., Sabonis, D., Hinderling, M., Kate, S. C. ten, Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Nichele, F.
Publikováno v:
ACS Nano 17, 18139-18147 (2023)
We perform supercurrent and tunneling spectroscopy measurements on gate-tunable InAs/Al Josephson junctions (JJs) in an in-plane magnetic field, and report on phase shifts in the current-phase relation measured with respect to an absolute phase refer
Externí odkaz:
http://arxiv.org/abs/2306.01514
Autor:
Haxell, D. Z., Coraiola, M., Hinderling, M., Kate, S. C. ten, Sabonis, D., Svetogorov, A. E., Belzig, W., Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Nichele, F.
Publikováno v:
Nano Letters 23, 7532-7538 (2023)
We perform switching current measurements of planar Josephson junctions (JJs) coupled by a common superconducting electrode, with independent control over the two superconducting phase differences. We observe an anomalous phase shift in the current--
Externí odkaz:
http://arxiv.org/abs/2306.00866
Bilayers consisting of two-dimensional (2D) electron and hole gases separated by a 10 nm thick AlGaAs barrier are formed by charge accumulation in epitaxially grown GaAs. Both vertical and lateral electric transport are measured in the millikelvin te
Externí odkaz:
http://arxiv.org/abs/2304.06691
Autor:
Coraiola, M., Haxell, D. Z., Sabonis, D., Weisbrich, H., Svetogorov, A. E., Hinderling, M., Kate, S. C. ten, Cheah, E., Krizek, F., Schott, R., Wegscheider, W., Cuevas, J. C., Belzig, W., Nichele, F.
Publikováno v:
Nat Commun 14, 6784 (2023)
In hybrid Josephson junctions with three or more superconducting terminals coupled to a semiconducting region, Andreev bound states may form unconventional energy band structures, or Andreev matter, which are engineered by controlling superconducting
Externí odkaz:
http://arxiv.org/abs/2302.14535