The origin of the turn-on phenomenon in Td-MoTe2

Abstract

We did the resistivity and scanning tunneling microscope/spectroscopy (STM/STS) experiments at different temperatures and magnetic fields to investigate the origin of the turn-on (t-o) phenomenon of Td-MoTe2. There are two interesting observations. Firstly, magnetoresistance (MR) follows the Kohler rule scaling: MR - (H/p0)m with m - 1.92 and the t-o temperature T under different magnetic fields can also be scaled by T - (H-Hc)u with u = 1/2. Secondly, a combination of compensated electron-hole pockets and a possible electronic structure phase transition induced by the temperature have been validated in Td-MoTe2 by the STM/STS experiments. Compared with the STS of Td-MoTe2 single crystal under H = 0, the STS hardly changes even when the applied field is up to 7 T. The origins of the t-o phenomenon in Td-MoTe2 are discussed. Meanwhile, we analyzed the universality and applicability of the t-o phenomenon in the extreme MR materials with almost balanced hole and electron densities as well as with other systems where the density of hole or electron is in dominant position.

arXiv commentAttepted by Phys. Rev. B

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• Engineering Weyl phases and nonlinear Hall effects in T${}_d$-MoTe${}_2$
• Extended Kohler${}^{,}$s Rule of Magnetoresistance
• Linear and quadratic magnetoresistance in the semimetal SiP2
• Stable Weyl points, trivial surface states and particle-hole compensation in WP2
• Spin-resolved electronic response to the phase transition in MoTe${}_2$
• Angular dependence of the upper critical field in the high-pressure $1T^{\prime }$ phase of MoTe${}_2$
• Pressure-induced creation and annihilation of Weyl points in Td- and 1T"-Mo0.5W0.5Te2
• Extended Kohler's Rule of Magnetoresistance in TaCo${}_2$Te${}_2$
• The inadequacy of the $\rho$-T curve for phase transitions in the presence of magnetic fields
• Nonlinear magnetotransport in MoTe${}_2$
• Unusual temperature dependence of the band structure associated with local atomic distortion in monolayer 1T'-WTe2