Impacts of pressure to the structural, electronic and magnetic properties of Dirac semimetal EuMnBi2

Robust magnetism and crystal structure in Dirac semimetal EuMnBi2 under high pressure

“…In this work, we have carefully analyzed the magnetism of Eu sublattice and crystal structure using a pure EuMnBi 2 sample under quasihydrostatic pressure using timedomain synchrotron Mössbauer spectroscopy (SMS) in 151 Eu and synchrotron x-ray diffraction (XRD) techniques up to 33.1 GPa and 31.7 GPa, respectively. Our experiments show that the magnetic ordering temperature (T o ) rises monotonically with increasing pressure and the magnetic order survives up to 33.1 GPa, contrary to the previous findings [25]. In addition, the tetragonal crystal lattice remains stable under compression up to at least 31.7 GPa.…”

“…Analyzing the pressure-volume data with the third-order Birch-Murnaghan equation of state yields the bulk modulus B 0 = 36.7(3) GPa, its pressure derivative B ′ 0 = 4.32 (5), and zero-pressure volume V 0 = 457.87(6) Å 3 . The B 0 value is slightly lower than the reported value of 41.8 GPa [25]. This small discrepancy may originate from the less hydrostatic pressure medium used in the earlier study.…”

“…These findings motivate us to use pressure as a control parameter and investigate the impact on the magnetic state, which provides the foundation for the magnetic control of electronic structure. Earlier electronic transport study indicates that the application of pressure initially enhances the T N of Eu ions up to 4 GPa, beyond which the magnetic order is suppressed [25]. Under further compression to 6 GPa, another low-temperature transition of a different nature was observed.…”

Single crystal growth and physical properties of layered compound SrCdBi2

“…At zero field, ρ ab (T ) decreases slightly with decreasing temperature above 210 K, while drops steeply below this temperature. The residual resistivity ratio = ρ ab (300 K)/ρ ab (2 K) = 44.8 is much larger than that in other 112 type bismuthides[9][10][11][12][13][14][15][16][17][18][19][20][21][22], suggesting that the single crystals obtained in our experiment have high quality. When applying magnetic field, ρ ab (T ) increases slightly at high temperature and the anomaly at about 210 K almost keep unchanged for both H ab and H c, but ρ ab (T ) increases obviously and shows a strong anisotropy at low temperature for both H ab and H c. And beyond that, a…”

Exploiting the fraternal twin nature of thermoelectrics and topological insulators in Zintl phases as a tool for engineering new efficient thermoelectric generators

“…As earlier indicated EuZnSb 2 is also a TDSM, 207 and along with other related phases [212][213][214][215] presents a fruitful playground to explore the influence of a complex band structure and Dirac bands to achieving excellent TE performance. It, therefore, remains to be seen how the robust electronic band structure of the various phases will play out as it pertains to the evolution of their respective TE transport properties.…”