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Probing the topological protection of edge states in multilayer tungsten ditelluride with the superconducting proximity effect
X. Ballu, Z. Dou, L. Bugaud +9
The topology of WTe2, a transition metal dichalcogenide with large spin-orbit interactions, is thought to combine type II Weyl semimetal and second-order topological insulator (SOT…
Unconventional Superconducting Phase Diagram of Monolayer WTe2
Tiancheng Song, Yanyu Jia, Guo Yu +13
The existence of a quantum critical point (QCP) and fluctuations around it are believed to be important for understanding the phase diagram in unconventional superconductors such a…
Transport signatures of Fermi arcs at twin boundaries in Weyl materials
Sahal Kaushik, Iñigo Robredo, Nitish Mathur +4
One of the most striking signatures of Weyl fermions is their surface Fermi arcs. Less known is that Fermi arcs can also be localized at internal twin boundaries where two Weyl mat…
Landau Quantization and Highly Mobile Fermions in an Insulator
Pengjie Wang, Guo Yu, Yanyu Jia +9
In strongly correlated materials, quasiparticle excitations can carry fractional quantum numbers. An intriguing possibility is the formation of fractionalized, charge-neutral fermi…
Determination of the Fermi surface and field-induced quasi-particle tunneling around the Dirac nodal-loop in ZrSiS
C. S. A. Müller, T. Khouri, M. R. van Delft +8
Unambiguous and complete determination of the Fermi surface is a primary step in understanding the electronic properties of topical metals and semi-metals, but only in a relatively…
Origin of the butterfly magnetoresistance in ZrSiS
J. A. Voerman, L. Mulder, J. C. de Boer +4
ZrSiS has been identified as a topological material made from non-toxic and earth-abundant elements. Together with its extremely large and uniquely angle-dependent magnetoresistanc…
Magneto-optical probe of the fully gapped Dirac band in ZrSiS
E. Uykur, L. Z. Maulana, L. M. Schoop +3
We present a far-infrared magneto-optical study of the gapped nodal-line semimetal ZrSiS in magnetic fields up to 7 T. The observed field-dependent features, which represent in…
Modular Arithmetic with Nodal Lines: Drumhead Surface States in ZrSiTe
Lukas Muechler, Andreas Topp, Raquel Queiroz +5
We study the electronic structure of the nodal line semimetal ZrSiTe both experimentally and theoretically. We find two different surface states in ZrSiTe - topological drumhead su…
Free-carrier dynamics in AuPb probed by optical conductivity measurements
R. Kemmler, R. Hübner, A. Löhle +5
We measured the optical reflectivity of the Dirac material AuPb in a broad frequency range (30 - 48 000 cm) for temperatures between 9 and 300 K. The optical conductiv…
Topological band crossings in hexagonal materials
Jonathan Zhang, Y. -H. Chan, Ching-Kai Chiu +3
Topological semimetals exhibit band crossings near the Fermi energy, which are protected by the nontrivial topological character of the wave functions. In many cases, these topolog…
Flat optical conductivity in ZrSiS due to two-dimensional Dirac bands
M. B. Schilling, L. M. Schoop, B. V. Lotsch +2
ZrSiS exhibits a frequency-independent interband conductivity in a broad range from 250 to 2500 cm (30 - 300 meV). This makes ZrS…
Unconventional mass enhancement around the Dirac nodal loop in ZrSiS
S. Pezzini, M. R. van Delft, L. Schoop +5
The topological properties of fermions arise from their low-energy Dirac-like band dispersion and associated chiralities. Initially confined to points, extensions of the Dirac disp…