Low temperature investigation of candidate type-II Weyl semimetal LaAlGe
ORAL
Abstract
Weyl semimetals continue to be a flourishing topic of research because of their non-trivial surface states and topology [1] and their exciting experimental realizations in magnetotransport [2], thermopower [3], and optical spectroscopy [4]. These unique ground states motivate us to investigate the proposed Weyl semimetal LaAlGe [5], a compound previously only investigated theoretically and with X-ray diffraction.
We use a molten flux growth technique to precipitate pristine LaAlGe single crystals that crystalize in the non-centrosymmetric crystal structure required for Weyl points to exist. We will discuss our electrical transport, magnetization, penetration depth, and heat capacity measurements of this topological compound, detailing both our experimental results and the future implications of this work.
[1] B. Yan et al., Annu. Rev. Condens. Matter Phys. 8, 337 (2017)
[2] C. Shekhar et al., Nat. Phys. 11, 645 (2015)
[3] B. Skinner et al., Sci. Adv. 4, 1 (2019)
[4] N. Sirica et al., Phys. Rev. Lett. 122, 197401 (2019)
[5] S.-Y. Xu et al., Sci. Adv. 3, 1 (2018)
We use a molten flux growth technique to precipitate pristine LaAlGe single crystals that crystalize in the non-centrosymmetric crystal structure required for Weyl points to exist. We will discuss our electrical transport, magnetization, penetration depth, and heat capacity measurements of this topological compound, detailing both our experimental results and the future implications of this work.
[1] B. Yan et al., Annu. Rev. Condens. Matter Phys. 8, 337 (2017)
[2] C. Shekhar et al., Nat. Phys. 11, 645 (2015)
[3] B. Skinner et al., Sci. Adv. 4, 1 (2019)
[4] N. Sirica et al., Phys. Rev. Lett. 122, 197401 (2019)
[5] S.-Y. Xu et al., Sci. Adv. 3, 1 (2018)
–
Presenters
-
Mark Zic
- University of Maryland, College Park