Anomalous conductivity tensor in the Dirac semimetal Na_3Bi

Autor:	Xiong, Jun, Kushwaha, Satya, Krizan, Jason, Liang, Tian, Cava, R. J., Ong, N. P.
Rok vydání:	2015
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	EPL, 114 (2016) 27002
Druh dokumentu:	Working Paper
DOI:	10.1209/0295-5075/114/27002
Popis:	Na3Bi is a Dirac semimetal with protected nodes that may be sensitive to the breaking of time-reversal invariance in a magnetic field B. We report experiments which reveal that both the conductivity and resistivity tensors exhibit robust anomalies in B. The resistivity $\rho_{xx}$ is B-linear up to 35 T, while the Hall angle exhibits an unusual profile approaching a step-function. The conductivities $\sigma_{xx}$ and $\sigma_{xy}$ share identical power-law dependences at large B. We propose that these significant deviations from conventional transport result from an unusual sensitivity of the transport lifetime to B. Comparison with Cd3As2 is made. Comment: 8 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1502.06266 Zobrazit plný text záznamu View this record from Arxiv