Peter Rickhaus
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View article: Quasiparticle and superfluid dynamics in Magic-Angle Graphene
Quasiparticle and superfluid dynamics in Magic-Angle Graphene Open
Magic-Angle Twisted Bilayer Graphene (MATBG) shows a wide range of correlated phases which are electrostatically tunable. Despite a growing knowledge of the material, there is yet no consensus on the microscopic mechanisms driving its supe…
View article: Antiferromagnetic Nanoscale Bit Arrays of Magnetoelectric Cr<sub>2</sub>O<sub>3</sub> Thin Films
Antiferromagnetic Nanoscale Bit Arrays of Magnetoelectric Cr<sub>2</sub>O<sub>3</sub> Thin Films Open
Magnetism of oxide antiferromagnets (AFMs) has been studied in single crystals and extended thin films. The properties of AFM nanostructures still remain underexplored. Here, we report on the fabrication and magnetic imaging of granular 10…
View article: Antiferromagnetic nanoscale bit arrays of magnetoelectric Cr$_2$O$_3$ thin films
Antiferromagnetic nanoscale bit arrays of magnetoelectric Cr$_2$O$_3$ thin films Open
Magnetism of oxide antiferromagnets (AFMs) has been studied in single crystals and extended thin films. The properties of AFM nanostructures still remain underexplored. Here, we report on the fabrication and magnetic imaging of granular 10…
View article: A quantum sensing metrology for magnetic memories
A quantum sensing metrology for magnetic memories Open
Magnetic random access memory (MRAM) is a leading emergent memory technology that is poised to replace current non-volatile memory technologies such as eFlash. However, controlling and improving distributions of device properties becomes a…
View article: Quasiparticle and superfluid dynamics in Magic-Angle Graphene
Quasiparticle and superfluid dynamics in Magic-Angle Graphene Open
Magic-Angle Twisted Bilayer Graphene shows a wide range of correlated phases which are electrostatically tunable. Despite a growing knowledge of the material, there is yet no consensus on the microscopic mechanisms driving its superconduct…
View article: Gate-defined superconducting channel in magic-angle twisted bilayer graphene
Gate-defined superconducting channel in magic-angle twisted bilayer graphene Open
Magic-angle twisted bilayer graphene (MATBG) combines in one single material different phases such as insulating, metallic, and superconducting. These phases and their tunability make MATBG an important platform for the fabrication of supe…
View article: Gate-defined superconducting channel in magic-angle twisted bilayer graphene
Gate-defined superconducting channel in magic-angle twisted bilayer graphene Open
Magic-angle twisted bilayer graphene (MATBG) combines in one single material different phases like insulating, metallic and superconducting. These phases and their in-situ tunability make MATBG an important platform for the fabrication of …
View article: Scanning Nitrogen-Vacancy Magnetometry of Focused-Electron-Beam-Deposited Cobalt Nanomagnets
Scanning Nitrogen-Vacancy Magnetometry of Focused-Electron-Beam-Deposited Cobalt Nanomagnets Open
Focused-electron-beam-induced deposition is a promising technique for patterning nanomagnets in a single step. We fabricate cobalt nanomagnets in such a process and characterize their content, saturation magnetization, and stray magnetic f…
View article: Kagome Quantum Oscillations in Graphene Superlattices
Kagome Quantum Oscillations in Graphene Superlattices Open
Electronic spectra of solids subjected to a magnetic field are often discussed in terms of Landau levels and Hofstadter-butterfly-style Brown-Zak minibands manifested by magneto-oscillations in two-dimensional electron systems. Here, we pr…
View article: A quantum sensing metrology for magnetic memories
A quantum sensing metrology for magnetic memories Open
Magnetic random access memory (MRAM) is a leading emergent memory technology that is poised to replace current non-volatile memory technologies such as eFlash. However, the scaling of MRAM technologies is heavily affected by device-to-devi…
View article: Scanning NV magnetometry of focused-electron-beam-deposited cobalt nanomagnets
Scanning NV magnetometry of focused-electron-beam-deposited cobalt nanomagnets Open
Focused-electron-beam-induced deposition is a promising technique for patterning nanomagnets for spin qubit control in a single step. We fabricate cobalt nanomagnets in such a process, obtaining cobalt contents and saturation magnetization…
View article: Kagomé quantum oscillations in graphene superlattices
Kagomé quantum oscillations in graphene superlattices Open
Periodic systems feature the Hofstadter butterfly spectrum produced by Brown--Zak minibands of electrons formed when magnetic field flux through the lattice unit cell is commensurate with flux quantum and manifested by magneto-transport os…
View article: Imaging of Submicroampere Currents in Bilayer Graphene Using a Scanning Diamond Magnetometer
Imaging of Submicroampere Currents in Bilayer Graphene Using a Scanning Diamond Magnetometer Open
Nanoscale electronic transport gives rise to a number of intriguing physical\nphenomena that are accompanied by distinct spatial patterns of current flow.\nHere, we report on sensitive magnetic imaging of two-dimensional current\ndistribut…
View article: Quantum capacitive coupling between large-angle twisted graphene layers
Quantum capacitive coupling between large-angle twisted graphene layers Open
Large-angle twisted bilayer graphene (tBLG) is known to be electronically decoupled due to the spatial separation of the Dirac cones corresponding to individual graphene layers in the reciprocal space. The close spacing between the layers …
View article: A Tunable Monolithic SQUID in Twisted Bilayer Graphene
A Tunable Monolithic SQUID in Twisted Bilayer Graphene Open
Magic-angle twisted bilayer graphene (MATBG) hosts a number of correlated states of matter that can be tuned by electrostatic doping. Superconductivity has drawn considerable attention and the mechanism behind it is a topic of active discu…
View article: Probing Magnetic Defects in Ultra-Scaled Nanowires with Optically Detected Spin Resonance in Nitrogen-Vacancy Center in Diamond
Probing Magnetic Defects in Ultra-Scaled Nanowires with Optically Detected Spin Resonance in Nitrogen-Vacancy Center in Diamond Open
Magnetic nanowires (NWs) are essential building blocks of spintronics devices as they offer tunable magnetic properties and anisotropy through their geometry. While the synthesis and compositional control of NWs have seen major improvement…
View article: Fabry–Pérot cavities and quantum dot formation at gate-defined interfaces in twisted double bilayer graphene
Fabry–Pérot cavities and quantum dot formation at gate-defined interfaces in twisted double bilayer graphene Open
The rich and electrostatically tunable phase diagram exhibited by moiré materials has made them a suitable platform for hosting single material, multi-purpose devices. To engineer such devices, understanding electronic transport and locali…
View article: Tailoring the Band Structure of Twisted Double Bilayer Graphene with Pressure
Tailoring the Band Structure of Twisted Double Bilayer Graphene with Pressure Open
This is the measurement dataset for the article ''Tailoring the band structure of twisted double bilayer graphene with pressure''.
View article: Dataset for ''Tailoring the band structure of twisted double bilayer graphene with pressure''
Dataset for ''Tailoring the band structure of twisted double bilayer graphene with pressure'' Open
This is the measurement dataset for the article ''Tailoring the band structure of twisted double bilayer graphene with pressure''.
View article: Correlated electron-hole state in twisted double-bilayer graphene
Correlated electron-hole state in twisted double-bilayer graphene Open
Fermi nesting Correlated states have been shown to emerge in bilayer and trilayer graphene with the two-dimensional layers at just the right angle with respect to each other. Key to the enhanced importance of interactions are the so-called…
View article: Tailoring the flat bands in twisted double bilayer graphene
Tailoring the flat bands in twisted double bilayer graphene Open
Twisted two-dimensional structures open new possibilities in band structure engineering. At magic twist angles, flat bands emerge, which give a new drive to the field of strongly correlated physics. In twisted double bilayer graphene dual …
View article: Fabry-P\\'erot cavities and quantum dot formation at gate-defined\n interfaces in twisted double bilayer graphene
Fabry-P\\'erot cavities and quantum dot formation at gate-defined\n interfaces in twisted double bilayer graphene Open
The rich and electrostatically tunable phase diagram exhibited by moir\\'e\nmaterials has made them a suitable platform for hosting single material\nmulti-purpose devices. To engineer such devices, understanding electronic\ntransport and l…
View article: Scattering between minivalleys in a moiré material
Scattering between minivalleys in a moiré material Open
A unique feature of the complex band structures of moiré materials is the presence of minivalleys, their hybridization, and scattering between them. Here we investigate magneto-transport oscillations caused by scattering between minivalley…
View article: Electron transport in dual-gated three-layer
Electron transport in dual-gated three-layer Open
The low-energy band structure of few-layer MoS2 is relevant for a large variety of experiments ranging from optics to electronic transport. Its characterization remains challenging due to complex multiband behavior. We investigate the cond…
View article: Correlated electron-hole State in Twisted Double Bilayer Graphene
Correlated electron-hole State in Twisted Double Bilayer Graphene Open
When twisted to angles near 1◦, graphene multilayers provide a window on electron correlation physics. Here we report the discovery of a correlated electron-hole state in double bilayer graphene twisted to 2.37 ◦. At this angle the moir´e …
View article: Combined Minivalley and Layer Control in Twisted Double Bilayer Graphene
Combined Minivalley and Layer Control in Twisted Double Bilayer Graphene Open
Control over minivalley polarization and interlayer coupling is demonstrated in double bilayer graphene twisted with an angle of 2.37°. This intermediate angle is small enough for the minibands to form and large enough such that the charge…
View article: Fully Automated Identification of Two-Dimensional Material Samples
Fully Automated Identification of Two-Dimensional Material Samples Open
Thin nanomaterials are key constituents of modern quantum technologies and materials research. The identification of specimens of these materials with the properties required for the development of state-of-the-art quantum devices is usual…