147 citations · 433 across the 19 of their papers we have counts for
16 papers · 1 filter
Addressing the spin-valley flavors in moir'e mini-bands of MoS2
Chithra H. Sharma, Marta Prada, Jan-Hendrik Schmidt +6
The physics of moir'e superlattices and the resulting formation of mini-bands in van der Waals materials have opened up an exciting new field in condensed matter physics. These sys…
Comment on "Electron spin resonance and collective excitations in magic-angle twisted bilayer graphene"
Lars Tiemann, Marta Prada, Vincent Strenzke +1
This comment pertains the recent manuscript by Morissette {\it et al.} [arXiv:2206.08354v1]. The authors claim to have found signatures of collective excitations in electron spin r…
Nuclear-induced dephasing and signatures of hyperfine effects in isotopically purified C graphene
Vincent Strenzke, Jana M. Meyer, Isabell Grandt-Ionita +6
The hyperfine interaction between the spins of electrons and nuclei is both a blessing and a curse. It can provide a wealth of information when used as an experimental probing tech…
Acoustically Induced Giant Synthetic Hall Voltages in Graphene
Pai Zhao, Chithra H. Sharma, Renrong Liang +7
Any departure from graphene's flatness leads to the emergence of artificial gauge fields that act on the motion of the Dirac fermions through an associated pseudomagnetic field. He…
Particle-hole symmetry broken solutions in graphene nanoribbons: a multi-orbital, mean-field perspective
T. Schmirander, D. Pfannkuche, M. Prada
Mean-field theories have since long predicted edge magnetism in graphene nanoribbons, where the order parameter is given by the local magnetization. However, signatures of edge mag…
Electron-Spin-Resonance in a proximity-coupled MoS2/Graphene van-der-Waals heterostructure
Chithra H. Sharma, Pai Zhao, Lars Tiemann +4
Coupling graphene's excellent electron and spin transport properties with higher spin-orbit coupling material allows tackling the hurdle of spin manipulation in graphene, due to th…
Dirac imprints on the -factor anisotropy in graphene
Marta Prada, Lars Tiemann, Jonas Sichau +1
Dirac electrons in graphene are to lowest order spin 1/2 particles, owing to the orbital symmetries at the Fermi level. However, anisotropic corrections in the -factor appear du…
Angular momentum anisotropy of Dirac carriers: A new twist in graphene
Marta Prada
Dirac carriers in graphene are commonly characterized by a pseudospin degree of freedom, arising from the degeneracy of the two inequivalent sublattices. The inherent chirality of…
Polarization amplification by spin-doping in nanomagnetic/graphene hybrid systems
Tim Anlauf, Marta Prada, Stefan Freercks +6
The generation of non-equilibrium electron spin polarization, spin transport, and spin detection are fundamental in many quantum devices. We demonstrate that a lattice of magnetic…
Sublattice symmetry breaking and ultra low energy excitations in Graphene-on-hBN Heterostructures
U. R. Singh, M. Prada, V. Strenzke +4
The low-lying states of graphene contain exciting topological properties that depend on the interplay of different symmetry breaking terms. The corresponding energy gaps remained u…
Intrinsic spin-orbit coupling gap and the evidence of a topological state in graphene
Jonas Sichau, Marta Prada, Timothy J. Lyon +4
In 2005 Kane & Mele[C. L. Kane and E. J. Mele, Phys. Rev. Lett. 95, 226801 (2005)], predicted that at sufficiently low energy, graphene exhibits a topological state of matter with…
Anisotropy of spin coherence in high mobility quantum wells with arbitrary magnetic fields
M. Prada, D. Pfannkuche
We present a theoretical study of the anisotropy of the spin relaxation and decoherence in typical quantum wells with an arbitrary magnetic field. In such systems, the orientation…
Unidirectional direct current in coupled nanomechanical resonators by tunable symmetry breaking
Marta Prada, Gloria Platero, Daniela Pfannkuche
We investigate theoretically the non-linear dynamics of a coupled nanomechanical oscillator. Under a weak radio frequency excitation, the resonators can be parametrically tuned int…
Coulomb Blockade in a Coupled Nanomechanical Electron Shuttle
Chulki Kim, Marta Prada, Robert H. Blick
We demonstrate single electron shuttling through two coupled nanomechanical pendula. The pendula are realized as nanopillars etched out of the semiconductor substrate. Coulomb bloc…
Spin-orbit splittings in Si/SiGe quantum wells
M. Prada, G. Klimeck, R. Joynt
We present a calculation of the wavevector-dependent subband level splitting from spin-orbit coupling in Si/SiGe quantum wells. We first use the effective-mass approach, where the…
Spin Relaxation in Isotopically Purified Silicon Quantum Dots
M. Prada, R. H. Blick, R. Joynt
We investigate spin-flip processes of Si quantum dots due to spin-orbit coupling. We utilize the spin-orbit coupling constants related to bulk and structure inversion asymmetry obt…