Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Hell, Michael P."'
Quantum wells in InAs/GaSb heterostructures can be tuned to a topological regime associated with the quantum spin Hall effect, which arises due to an inverted band gap and hybridized electron and hole states. Here, we investigate electron-hole hybrid
Externí odkaz:
http://arxiv.org/abs/2007.05391
Publikováno v:
Phys. Rev. B 98, 205403 (2018)
We present a theoretical analysis of a Majorana-based qubit consisting of two topological superconducting islands connected via a Josephson junction. The qubit is operated by electrostatic gates which control the coupling of two of the four Majorana
Externí odkaz:
http://arxiv.org/abs/1807.05839
Publikováno v:
Phys. Rev. B 97, 161401 (2018)
Experimental evidence for Majorana bound states (MBSs) is so far mainly based on the robustness of a zero-bias conductance peak. However, similar features can also arise due to Andreev bound states (ABSs) localized at the end of an island. We show th
Externí odkaz:
http://arxiv.org/abs/1710.05294
Publikováno v:
Phys. Rev. B 96, 035444 (2017)
Two-dimensional electron gases with strong spin-orbit coupling covered by a superconducting layer offer a flexible and potentially scalable platform for Majorana networks. We predict Majorana bound states (MBSs) to appear for experimentally achievabl
Externí odkaz:
http://arxiv.org/abs/1704.06427
Publikováno v:
Phys. Rev. Lett. 118, 107701 (2017)
We model theoretically a two-dimensional electron gas (2DEG) covered by a superconductor and demonstrate that topological superconducting channels are formed when stripes of the superconducting layer are removed. As a consequence, Majorana bound stat
Externí odkaz:
http://arxiv.org/abs/1608.08769
Publikováno v:
Phys. Rev. B 94, 035424 (2016)
We numerically compute the low-energy spectrum of a gate-controlled superconducting topological nanowire segmented into two islands, each Josephson-coupled to a bulk superconductor. This device may host two pairs of Majorana bound states and could pr
Externí odkaz:
http://arxiv.org/abs/1601.07369
Autor:
Aasen, David, Hell, Michael, Mishmash, Ryan V., Higginbotham, Andrew, Danon, Jeroen, Leijnse, Martin, Jespersen, Thomas S., Folk, Joshua A., Marcus, Charles M., Flensberg, Karsten, Alicea, Jason
Publikováno v:
Phys. Rev. X 6, 031016 (2016)
We introduce a scheme for preparation, manipulation, and readout of Majorana zero modes in semiconducting wires with mesoscopic superconducting islands. Our approach synthesizes recent advances in materials growth with tools commonly used in quantum-
Externí odkaz:
http://arxiv.org/abs/1511.05153
Publikováno v:
Nature Physics 9, 801 (2013)
An attractive feature of magnetic adatoms and molecules for nanoscale applications is their superparamagnetism, the preferred alignment of their spin along an easy axis preventing undesired spin reversal. The underlying magnetic anisotropy barrier --
Externí odkaz:
http://arxiv.org/abs/1407.5273
Publikováno v:
Phys. Rev. B 88, 115435 (2013)
We revisit the transport of spin-degrees of freedom across an electrically and thermally biased tunnel junction between two ferromagnets with non-collinear magnetizations. Besides the well-known charge and spin currents we show that a non-zero spin-q
Externí odkaz:
http://arxiv.org/abs/1305.4843
Publikováno v:
Phys. Rev. Lett. 107, 087202 (2011)
We show that spin anisotropy can be transferred to an isotropic system by transport of spin quadrupole moment. We derive the quadrupole moment current and continuity equation and study a high-spin valve structure consisting of two ferromagnets couple
Externí odkaz:
http://arxiv.org/abs/1009.5874