Publications (13)
Tunable competing optical excitation pathways in the topological surface states of BiTe
Shin Yokoyama, Takahito Takeda, Nagi Suzuki +9
Understanding coherent optical responses of topological surface states (TSSs) requires disentangling excitation pathways from the electronic band structure. Here, using angle-resol…
Nodal-line driven anomalous susceptibility in ZrSiS
Bruno Gudac, Markus Kriener, Yuriy V. Sharlai +6
We demonstrate a unique approach to test the signature of the nodal-line physics by thermodynamic methods. By measuring magnetic susceptibility in ZrSiS we found an intriguing temp…
Large linear magnetoresistance in the Dirac semimetal TlBiSSe
Mario Novak, Satoshi Sasaki, Kouji Segawa +1
The mixed-chalcogenide compound TlBiSSe realizes a three-dimensional (3D) Dirac semimetal state. In clean, low-carrier-density single crystals of this material, we found Shubnikov-…
Instantaneous Photon Drag Currents in Topological Insulators
Yoshito Onishi, Zhi Ren, Mario Novak +3
Topological insulator materials have been extensively studied in the field of condensed matter physics because nontrivial topology in the electronic state gives rise to a novel spi…
Electrical detection of the spin polarization due to charge flow in the surface state of the topological insulator Bi_1.5 Sb_0.5 Te_1.7 Se_1.3
Yuichiro Ando, Takahiro Hamasaki, Takayuki Kurokawa +7
We detected the spin polarization due to charge flow in the spin non-degenerate surface state of a three dimensional topological insulator by means of an all-electrical method. The…
Optical conductivity of layered topological semimetal TaNiTe
Jakov BudiÄ, Serena Nasrallah, D. Santos-Cottin +9
We present an infrared spectroscopy study of the layered topological semimetal TaNiTe, a material with a quasi-one-dimensional structure and strong in-plane anisotropy. Despite…
Unusual nature of fully-gapped superconductivity in In-doped SnTe
Mario Novak, Satoshi Sasaki, Markus Kriener +2
The superconductor Sn_{1-x}In_{x}Te is a doped topological crystalline insulator and has become important as a candidate topological superconductor, but its superconducting phase d…
Addressing Shape and Extent of Weyl cones in TaAs by Landau level spectroscopy
David Santos-Cottin, Jan Wyzula, Florian Le Mardelé +7
Tantalum arsenide, TaAs, is a prime example of a topological semimetal with two types of Weyl nodes, W1 and W2, whose bulk signatures have proven elusive. We apply Landau level spe…
Origin of a shallow electron pocket: -band in CoTaS studied by angle-resolved photoemission spectroscopy
Wojciech Sas, Yuki Utsumi Boucher, Seyed Ashkan Moghadam Ziabari +11
We investigate the electronic structure and Fermi surface of CoTaS using angle-resolved photoemission spectroscopy (ARPES) combined with theoretical modeling beyond sta…
Probing the Fermi surface with Quantum Oscillation Measurements in the Dirac semimetal TaNiTe
Maximilian Daschner, Bruno Gudac, Mario Novak +3
We report a detailed investigation of the Fermi surface in the layered Dirac semimetal TaNiTe. We probed the magnetization, magnetic torque and magnetoresistance in high-qualit…
Hopping Electron Transport in Doped Polyaniline: an Experimental Verification of the Fogler-Teber-Shklovskii Model
Mirko BaÄani, Mario Novak, Ivan KokanoviÄ +1
We present a study of the temperature (T) dependence of the dc electrical conductivity of polyaniline pellets doped over a wide range. A crossover between low-T variable-range hopp…
Unconventional temperature evolution of quantum oscillations in Sn-doped BiSbTeS topological insulator
Bruno Gudac, Petar SaÄer, Filip OrbaniÄ +8
Among various topological insulators, Sn-doped BiSbTeS stands out for its exceptional properties. It has a wide energy gap and typically exhibits a well-isola…
Intercalation-induced states at the Fermi level and the coupling of intercalated magnetic ions to conducting layers in NiNbS
Yuki Utsumi Boucher, Izabela BiaÅo, Mateusz A. Gala +11
The magnetic sublayers introduced by intercalation into the host transition-metal dichalcogenide (TMD) are known to produce various magnetic states. The magnetic sublayers and thei…