Extremely large and anisotropic magnetoresistance in rare-earth tritelluride TbTe3

Abstract

The electrical transport properties of rare-earth tritelluride TbTe3 are investigated at low temperatures and high magnetic fields. The charge-density-wave and anti-ferromagnetic transition are found at 334 K (340 K) and 6.0 K (9.4 K) for bulk TbTe3 (thin device), respectively. An extremely large and non-saturating magnetoresistance (MR) as high as 5600% is detected under a perpendicular magnetic field at 1.8 K and 9 T. Furthermore, angular-dependent transport measurements reveal obvious anisotropic MR behaviors in both bulk TbTe3 and thin devices. Moreover, in the thin TbTe3 device, exotic linear MR at low temperatures is observed in all field directions. Hall measurements are also performed, and the quantitative fitting of the two-band model to longitudinal and Hall conductivity of the TbTe3 device reveals two types of carriers (hole and electron). Our work may stimulate interests of layered rare-earth tritellurides in fundamental physics and potential technological applications.

Advances in Rare‐Earth Tritelluride Quantum Materials: Structure, Properties, and Synthesis

“…Complex phase diagrams of RTe 3 discloses the interplay of superconductivity, AFM, and CDW, on account of which the probable influence of spin fluctuations on magnetoresistance is unescapable. [84] This stimulates the microscopic origin of the interesting linear magnetoresistance properties in RTe 3 devices. Also, detailed conducive angle-dependent magnetoresistance and Hall measurements are not explained for the majority of RTe 3 , for example, TbTe 3 thin films.…”

“…Also, detailed conducive angle-dependent magnetoresistance and Hall measurements are not explained for the majority of RTe 3 , for example, TbTe 3 thin films. [84] In parallel, it is much needed to understand how to tune and balance the CDW and SC behavior in these unique set of materials through straining, alloying, and thickness engineering approaches.…”

“…Highly conductive RTe 3 is hence viable for high spintronic AFM devices such as random-access memory devices, magnetic sensors, and hard drives. [84]…”

Strongly coupled charge, orbital and spin order in TbTe$_{3}$

“…However, such a mutual coupling would reveal the impact of magnetic order on the CDWs necessary to explain the unusual behavior of H C2 through the series of ReTe 3 's in the high-pressure superconducting phase that occurs after suppression of the CDW ordering temperature to 0 K [9]. Furthermore, this mutual coupling mechanism could also explain the role of spin fluctuations on the observed magnetoresistance in the ReTe 3 compounds [12,39,40] that suggest an inverse relation of the unusually large carrier mobility of the conduction electrons with the moment of the constituting rare-earth ion. Therefore, a complete picture of coupled order parameters in TbTe 3 that includes unconventional superconductivity will strongly benefit from hard x-ray, resonant soft x-ray and neutron scattering experiments performed under hydrostatic pressure.…”

“…CDW, magnetism and unconventional superconductivity, are equally fascinating although much less understood [6][7][8][9][10]. Even though the magnetic and superconducting/charge constituents are well-separated as in heavy-fermion systems, the RTe 3 compounds show no evidence for heavy Fermion behavior [8,11,12]. Furthermore, no strong correlations have been found between the magnetic rare earth layer and the CDW layers [7,10,13].…”