6.2k citations · 6.9k across the 14 of their papers we have counts for
18 papers
Emergent Surface Kondo Flat Band Driven by Competing Interactions in a Topological Ferromagnet
Nazar Zaremba, Susmita Changdar, Haojie Guo +28
A central goal of modern condensed matter physics is to uncover new quantum states of matter arising from the intertwined effects of strong electron correlations, magnetism, and ba…
Crystallographic imperfections and exotic superconductivity of UBe
Andreas Leithe-Jasper, Markus König, Yusei Shimizu +16
The symmetry of the superconducting gap is related to the symmetry of the crystal structure. In unconventional superconductors, big changes of the critical temperature, critical fi…
Directional ballistic magnetotransport in the delafossite metals PdCoO and PtCoO
Michal Moravec, Graham Baker, Maja D. Bachmann +9
Studies of electronic transport in width-restricted channels of PdCoO have recently revealed a novel `directional ballistic' regime, in which ballistic propagation of electrons…
Investigation of Planckian behavior in a high-conductivity oxide: PdCrO
Elina Zhakina, Ramzy Daou, Antoine Maignan +12
The layered delafossite metal PdCrO is a natural heterostructure of highly conductive Pd layers Kondo coupled to localized spins in the adjacent Mott insulating CrO layers.…
Field-induced compensation of magnetic exchange as the possible origin of reentrant superconductivity in UTe
Toni Helm, Motoi Kimata, Kenta Sudo +12
The potential spin-triplet heavy-fermion superconductor UTe exhibits signatures of multiple distinct superconducting phases. For field aligned along the axis, a metamagneti…
Low-symmetry non-local transport in microstructured squares of delafossite metals
Philippa H. McGuinness, Elina Zhakina, Markus König +5
Intense work studying the ballistic regime of electron transport in two dimensional systems based on semiconductors and graphene had been thought to have established most of the ke…
Surface excitations relaxation in the Kondo insulator SmGdB
J. C. Souza, M. König, M. V. Ale Crivillero +7
The interplay between non-trivial topological states of matter and strong electronic correlations is one of the most compelling open questions in condensed matter physics. Due to e…
Systematic manipulation of the surface conductivity of SmB
M. Victoria Ale Crivillero, M. König, J. C. Souza +5
We show that the resistivity plateau of SmB at low temperature, typically taken as a hallmark of its conducting surface state, can systematically be influenced by different sur…
Unidirectional Kondo scattering in layered NbS2
Edoardo Martino, Carsten Putzke, Markus König +13
Crystalline defects can modify quantum interactions in solids, causing unintuitive, even favourable, properties such as quantum Hall effect or superconducting vortex pinning. Here…
Magnetic electron collimation in three-dimensional semi-metals
Xiangwei Huang, Carsten Putzke, Chunyu Guo +6
While electrons moving perpendicular to a magnetic field are confined to cyclotron orbits, they can move freely parallel to the field. This simple fact leads to complex current flo…
Controlled introduction of defects to delafossite metals by electron irradiation
V. Sunko, P. H. McGuinness, C. S. Chang +7
The delafossite metals PdCoO, PtCoO and PdCrO are among the highest conductivity materials known, with low temperature mean free paths of tens of microns in the b…
Super-geometric electron focusing on the hexagonal Fermi surface of PdCoO
Maja D. Bachmann, Aaron L. Sharpe, Arthur W. Barnard +6
Geometric electron optics may be implemented in solid state when transport is ballistic on the length scale of a device. Currently, this is realized mainly in 2D materials characte…
Oscillations in Interlayer Transport of Delafossites
Carsten Putzke, Maja D. Bachmann, Philippa McGuinness +10
Transport of electrons in a bulk metal is usually well captured by their particle-like aspects, while their wave-like nature is commonly harder to observe. Microstructures can be a…
Unconventional magneto-transport in ultrapure PdCoO2 and PtCoO2
Nabhanila Nandi, Thomas Scaffidi, Pallavi Kushwaha +11
We have studied magneto transport in the single-band, quasi-two-dimensional metals PdCoO2 and PtCoO2, which have extremely long mean free paths. We observer a strong temperature de…
Imaging currents in HgTe quantum wells in the quantum spin Hall regime
Katja C. Nowack, Eric M. Spanton, Matthias Baenninger +10
The quantum spin Hall (QSH) state is a genuinely new state of matter characterized by a non-trivial topology of its band structure. Its key feature is conducting edge channels whos…
Unexpected edge conduction in HgTe quantum wells under broken time reversal symmetry
Eric Yue Ma, M. Reyes Calvo, Jing Wang +16
The realization of quantum spin Hall (QSH) effect in HgTe quantum wells (QWs) is considered a milestone in the discovery of topological insulators. The QSH edge states are predicte…
Quantum Spin Hall Insulator State in HgTe Quantum Wells
Markus Koenig, Steffen Wiedmann, Christoph Bruene +5
Recent theory predicted that the Quantum Spin Hall Effect, a fundamentally novel quantum state of matter that exists at zero external magnetic field, may be realized in HgTe/(Hg,Cd…
Direct observation of the Aharonov-Casher phase
M. Koenig, A. Tschetschetkin, E. M. Hankiewicz +7
Ring structures fabricated from HgTe/HgCdTe quantum wells have been used to study Aharonov-Bohm type conductance oscillations as a function of Rashba spin-orbit splitting strength.…