Christopher Mittag
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View article: Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots
Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots Open
ISSN:0031-9007
View article: Kondo effect and spin–orbit coupling in graphene quantum dots
Kondo effect and spin–orbit coupling in graphene quantum dots Open
The Kondo effect is a cornerstone in the study of strongly correlated fermions. The coherent exchange coupling of conduction electrons to local magnetic moments gives rise to a Kondo cloud that screens the impurity spin. Here we report on …
View article: Gate-defined quantum point contact in an InSb two-dimensional electron gas
Gate-defined quantum point contact in an InSb two-dimensional electron gas Open
We investigate an electrostatically defined quantum point contact in a\nhigh-mobility InSb two-dimensional electron gas. Well-defined conductance\nplateaus are observed, and the subband structure of the quantum point contact\nis extracted …
View article: Few-Electron Single and Double Quantum Dots in an In As Two-Dimensional Electron Gas
Few-Electron Single and Double Quantum Dots in an In As Two-Dimensional Electron Gas Open
Most proof-of-principle experiments for spin qubits have been performed with GaAs-based quantum dots because of the excellent control they offer over tunneling barriers and the orbital and spin degrees of freedom. Here we present the first…
View article: Data Repository: Kondo effect and spin–orbit coupling in graphene quantum dots
Data Repository: Kondo effect and spin–orbit coupling in graphene quantum dots Open
ISSN:2041-1723
View article: Magnetotransport of electrically induced two-dimensional hole gases in undoped GaSb quantum wells
Magnetotransport of electrically induced two-dimensional hole gases in undoped GaSb quantum wells Open
We have performed magnetotransport measurements on electrically induced two-dimensional hole gases in undoped GaSb/AlSb quantum wells. The mobilities of the holes are sufficient to observe Shubnikov–de Haas oscillations for a few teslas of…
View article: Electronic g factor and magnetotransport in InSb quantum wells
Electronic g factor and magnetotransport in InSb quantum wells Open
High mobility InSb quantum wells with tunable carrier densities are investigated by transport experiments in magnetic fields tilted with respect to the sample normal. We employ the coincidence method and the temperature dependence of the S…
View article: Electron-Hole Interference in an Inverted-Band Semiconductor Bilayer
Electron-Hole Interference in an Inverted-Band Semiconductor Bilayer Open
Electron optics in the solid state promises new functionality in electronics through the possibility of realizing nano- and micrometer-sized interferometers, lenses, collimators, and beam splitters that manipulate electrons instead of ligh…
View article: Gate-defined quantum point contact in an InAs two-dimensional electron gas
Gate-defined quantum point contact in an InAs two-dimensional electron gas Open
We experimentally study quantized conductance in an electrostatically defined\nconstriction in a high-mobility InAs two-dimensional electron gas. A parallel\nmagnetic field lifts the spin degeneracy and allows for the observation of\nplate…
View article: Quantum transport in high-quality shallow InSb quantum wells
Quantum transport in high-quality shallow InSb quantum wells Open
InSb is one of the promising candidates to realize a topological state through proximity induced superconductivity in a material with strong spin–orbit interactions. In two-dimensional systems, thin barriers are needed to allow strong coup…
View article: Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells
Electric-field-induced two-dimensional hole gas in undoped GaSb quantum wells Open
We have measured hole transport in electrically induced two-dimensional hole gases in undoped GaSb/AlSb quantum wells. In order to access the electrically induced two-dimensional hole gas in GaSb quantum wells, recessed ohmic contacts were…
View article: Spin States in a Gate-Defined Quantum Point Contact in an InAs Two-Dimensional Electron Gas
Spin States in a Gate-Defined Quantum Point Contact in an InAs Two-Dimensional Electron Gas Open
We experimentally study quantized conductance in an electrostatically defined constriction in a high-mobility InAs two-dimensional electron gas. A parallel magnetic field lifts the spin degeneracy and allows for the observation of plateaus…
View article: Phase slips and parity jumps in quantum oscillations of inverted InAs/GaSb quantum wells
Phase slips and parity jumps in quantum oscillations of inverted InAs/GaSb quantum wells Open
We present magnetotransport measurements of a strongly hybridized inverted\nInAs/GaSb double quantum well. We find that the spin-orbit interaction leads to\nan appreciable spin-splitting of hole-like states, which form distinct Landau\nlev…
View article: Edge transport in InAs and InAs/GaSb quantum wells
Edge transport in InAs and InAs/GaSb quantum wells Open
We investigate low-temperature transport through single InAs quantum wells\nand broken-gap InAs/GaSb double quantum wells. Non-local measurements in the\nregime beyond bulk pinch-off confirm the presence of edge conduction in InAs\nquantum…
View article: Experimental signatures of the inverted phase in InAs/GaSb coupled quantum wells
Experimental signatures of the inverted phase in InAs/GaSb coupled quantum wells Open
Transport measurements are performed on InAs/GaSb double quantum wells at zero and finite magnetic fields applied parallel and perpendicular to the quantum wells. We investigate a sample in the inverted regime where electrons and holes coe…
View article: Experimental Evidence for the Topological Insulator Phase in InAs/GaSb Coupled Quantum Wells
Experimental Evidence for the Topological Insulator Phase in InAs/GaSb Coupled Quantum Wells Open
Transport measurements are performed on InAs/GaSb double quantum wells at zero and finite magnetic fields applied parallel and perpendicular to the quantum wells. We investigate a sample in the inverted regime where electrons and holes coe…