التفاصيل البيبلوغرافية
| العنوان: |
Layered van der Waals topological metals of TaTMTe4 (TM = Ir, Rh, Ru) family |
| المؤلفون: |
Shipunov, G., Piening, B. R., Wuttke, C., Romanova, T. A., Sadakov, A. V., Sobolevskiy, O. A., Guzovsky, E. Yu., Usoltsev, A. S., Pudalov, V. M., Efremov, D., Subakti, S., Wolf, D., Lubk, A., Büchner, B., Aswartham, S. |
| سنة النشر: |
2021 |
| المجموعة: |
Condensed Matter |
| مصطلحات موضوعية: |
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: |
Layered van~der~Waals materials of the family TaTMTe$_4$ (TM=Ir, Rh, Ru) are showing very interesting electronic properties. Here we report the synthesis, crystal growth and structural characterization of TaIrTe$_4$, TaRhTe$_4$, TaIr$_{1-x}$Rh$_{x}$Te$_4$ ($x = 0.06$; 0.14; 0.78; 0.92) and Ta$_{1+x}$Ru$_{1-x}$Te$_4$ single crystals. For Ta$_{1+x}$Ru$_{1-x}$Te$_4$ off-stoichiometry is shown. X-ray powder diffraction confirms that TaRhTe4 is isostructural to TaIrTe4. We show that all these compounds are metallic with diamagnetic behavior. Ta$_{1.26(2)}$Ru$_{0.75(2)}$Te$_{4.000(8)}$ exhibits an upturn in the resistivity at low temperatures which is strongly field dependent. Below $T \approx 4$K we observed signatures of the superconductivity in the TaIr$_{1-x}$Rh$_{x}$Te$_4$ compounds for $x = 0.92$. Magnetotransport measurements on all samples show weak magnetoresistance (MR) field dependence that is typically quadratic-in-field. However, for TaIr$_{1-x}$Rh$_{x}$Te$_4$ with $x\approx 0.78$, the MR has a linear term dominating in low fields that indicates the presence of Dirac cones in the vicinity of the Fermi energy. For TaRhTe$_4$ series the MR is almost isotropic. We have performed electronic structure calculations for isostructural TaIrTe$_4$ and TaRhTe$_4$ together with the projected total density of states. The main difference is appearance of the Rh-band close to the Fermi level. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1021/acs.jpclett.1c01648 |
| URL الوصول: |
http://arxiv.org/abs/2105.07431 |
| رقم الانضمام: |
edsarx.2105.07431 |
| قاعدة البيانات: |
arXiv |