226 citations · 1.2k across the 46 of their papers we have counts for
46 papers
Standard model of electromagnetism and chirality in crystals
R. Winkler, U. Zülicke
We present a general, quantitative theory of electromagnetism and chirality in crystals. Symmetry is its guiding principle, enabling us to consider macroscopic multipole densities…
Theory of electric, magnetic, and toroidal polarizations in crystalline solids with applications to hexagonal lonsdaleite and cubic diamond
R. Winkler, U. Zülicke
Multipolar order in bulk crystalline solids is characterized by multipole densities -- denoted as polarizations in this work -- that cannot be cleanly defined using the concepts of…
Coexistence of topological and nontopological Fermi-superfluid phases
K. Thompson, U. Zülicke, J. Brand
The two-dimensional spin-imbalanced Fermi gas subject to s-wave pairing and spin-orbit coupling is considered a promising platform for realizing a topological chiral-p-wave superfl…
Signatures of the Higgs mode in transport through a normal-metal--superconductor junction
Gaomin Tang, Wolfgang Belzig, Ulrich Zülicke +1
A superconductor subject to electromagnetic irradiation in the terahertz range can show amplitude oscillations of its order parameter. However, coupling this so-called Higgs mode t…
Collinear Orbital Antiferromagnetic Order and Magnetoelectricity in Quasi-2D Itinerant-Electron Paramagnets, Ferromagnets and Antiferromagnets
R. Winkler, U. Zülicke
We develop a comprehensive theory for magnetoelectricity in magnetically ordered quasi-2D systems whereby in thermal equilibrium an electric field can induce a magnetization an…
Fame and Obsolescence: Disentangling growth and ageing dynamics of patent citations
K. W. Higham, M. Governale, A. B. Jaffe +1
We present an analysis of citations accrued over time by patents granted by the United States Patent and Trademark Office in 1998. In contrast to previous studies, a disaggregation…
Longitudinal magnetoconductivity and magnetodielectric effect in bilayer graphene
U. Zülicke, R Winkler
It was recently shown that a finite imbalance between electron densities in the and valleys of bilayer graphene induces a magnetoelectric coupling. Here…
Multicriticality, Metastability, and Roton Feature in Bose-Einstein Condensates with Three-Dimensional Spin-Orbit Coupling
Renyuan Liao, Oleksander Fialko, Joachim Brand +1
We theoretically study homogeneously trapped atomic Bose-Einstein condensates where all three momentum components couple to a pseudo-spin- degree of freedom. Tuning the anisot…
Coulomb-exchange effects in nanowires with spin splitting due to a radial electric field
F. S. Gray, T. Kernreiter, M. Governale +1
We present a theoretical study of Coulomb exchange interaction for electrons confined in a cylindrical quantum wire and subject to a Rashba-type spin-orbit coupling with radial ele…
Spin susceptibility of two-dimensional transition metal dichalcogenides
H. Hatami, T. Kernreiter, U. Zülicke
We have obtained analytical expressions for the q-dependent static spin susceptibility of monolayer transition metal dichalcogenides, considering both the electron-doped and hole-d…
Exporting superconductivity across the gap: Proximity effect for semiconductor valence-band states due to contact with a simple-metal superconductor
A. G. Moghaddam, T. Kernreiter, M. Governale +1
The proximity effect refers to the phenomenon whereby superconducting properties are induced in a normal conductor that is in contact with an intrinsically superconducting material…
Signatures of tunable Majorana-fermion edge states
Rakesh P. Tiwari, U. Zülicke, C. Bruder
Chiral Majorana-fermion modes are shown to emerge as edge excitations in a superconductor--topological-insulator hybrid structure that is subject to a magnetic field. The velocity…
Valley filter from magneto-tunneling between single and bi-layer graphene
L Pratley, U. Zuelicke
We consider tunneling transport between two parallel graphene sheets where one is a single-layer sample and the other one a bilayer. In the presence of an in-plane magnetic field,…
Neutral edge modes in a superconductor -- topological-insulator hybrid structure in a perpendicular magnetic field
Rakesh P. Tiwari, U. Zülicke, C. Bruder +1
We study the low-energy edge states of a superconductor -- 3D topological-insulator hybrid structure (NS junction) in the presence of a perpendicular magnetic field. The hybridizat…
Fragility of the fractional quantum spin Hall effect in quantum gases
O. Fialko, J. Brand, U. Zuelicke
We consider the effect of contact interaction in a prototypical quantum spin Hall system of pseudo-spin-1/2 particles. A strong effective magnetic field with opposite directions fo…
Magneto-tunnelling spectroscopy of chiral two-dimensional electron systems
L. Pratley, U. Zuelicke
We present a theoretical study of momentum-resolved tunneling between parallel two-dimensional conductors whose charge carriers have a (pseudo-)spin-1/2 degree of freedom that is s…
Suppression of Coulomb exchange energy in quasi-two-dimensional hole systems
T. Kernreiter, M. Governale, R. Winkler +1
We have calculated the exchange-energy contribution to the total energy of quasi-two-dimensional hole systems realized by a hard-wall quantum-well confinement of valence-band state…
Anisotropic Zeeman splitting in p-type GaAs quantum point contacts
Y. Komijani, M. Csontos, I. Shorubalko +5
Low-temperature electrical conductance spectroscopy measurements of quantum point contacts implemented in p-type GaAs/AlGaAs heterostructures are used to study the Zeeman splitting…
Majorana fermions from Landau quantization in a superconductor--topological-insulator hybrid structure
Rakesh P. Tiwari, U. Zülicke, C. Bruder
We show that the interplay of cyclotron motion and Andreev reflection experienced by massless-Dirac-like charge carriers in topological-insulator surface states generates a Majoran…
Tracking the energies of one-dimensional subband edges in quantum point contacts using dc conductance measurements
A. P. Micolich, U. Zülicke
The semiconductor quantum point contact has long been a focal point for studies of one-dimensional electron transport. Their electrical properties are typically studied using ac co…
Band-mixing-mediated Andreev reflection of semiconductor holes
David Futterer, Michele Governale, Ulrich Zuelicke +1
We have investigated Andreev-reflection processes occurring at a clean interface between a -type semiconductor and a conventional superconductor. Our calculations are performed…
Static polarizability of two-dimensional hole gases
T. Kernreiter, M Governale, U. Zuelicke
We have calculated the density-density (Lindhard) response function of a homogeneous two-dimensional (2D) hole gas in the static (omega=0) limit. The bulk valence-band structure co…
AC transport properties of single and bilayer graphene
J. Z. Bernad, U. Zuelicke, K. Ziegler
We have performed a theoretical study of electronic transport in single and bilayer graphene based on the standard linear-response (Kubo) formalism and continuum-model descriptions…
Features due to spin-orbit coupling in the optical conductivity of single-layer graphene
P. Ingenhoven, J. Z. Bernad, U. Zuelicke +1
We have calculated the optical conductivity of a disorder-free single graphene sheet in the presence of spin-orbit coupling, using the Kubo formalism. Both intrinsic and structural…