# Highlights 2018

*n*-type (Zr,Hf)CoSb-based thermoelectric compounds with a high

*zT*of ≈ 1.0 by considering lanthanide contraction as a design factor to select reasonable alloying atoms. Combined with our previous work, we established (Zr,Hf)CoSb as the first half-Heusler system with matching

*p*-type and

*n*-type thermoelectric performance. more

Topological materials have been essential to discover analogs of fermionic elementary particles and to test fundamental laws predicted in high-energy physics. Considering the richness of physics that electrical transport in topological bulk materials have recently been provided, our group seeks to unravel thermal transport signatures of new emergent quantum phenomena in topological semimetals. Within the last three years, we have observed signatures of the mixed axial-gravitational anomaly in the Weyl semimetal NbP and of hydrodynamic electron flow at the Planckian bound of dissipation WP

_{2}.*A*

_{4}O

_{6}with

*A*= Cs, Rb revealed a Verwey-type charge ordering and electron localization transition within the negatively charged oxygen molecule building units. New silver oxoruthenates synthesized by hydrothermal methods were found to feature low-dimensional structural and magnetic properties. more

Our study establishes magnetic Kagomé-lattice WSM as a key material for fundamental research and device applications connecting topological physics and spintronics. more

_{2}MnGa, showing one of the highest AHC ~ (1600 Ω

^{-1}cm

^{-1}) at 2 K and highest known room temperature anomalous Hall angle (up to 12%) and anomalous Nernst thermopower (~6.0 µV K

^{−1}at 1 T magnetic field). Besides, we discover the first metallic intermetallic alloy compound Mn

_{2}CoGa, with finite magnetization (2 m

_{B}/f.u.), but zero AHC. more

_{2}and PdSe

_{2}we identified two compounds which combine topology with superconductivity. MoTe

_{2}with both superconductivity and a topologically non-trivial band structure is probably the first example of a time-reversal invariant topological (Weyl) superconductor. The unusual pressure dependence of superconductivity in pyrite-phase of PdSe

_{2}and topologically nontrivial bulk and surface states in its electronic structure offers a possibility to study the interplay between superconductivity and topological matter. more

*etc*. Existence of fermions in topological materials goes even beyond the Weyl and Dirac, showing nodal line fermion, double Weyl fermion, triple point fermion, sextuple fermion

*etc.*which also underline the physics of unusual properties. more