Large linear magnetoresistance in single HgSe crystals induced by low-concentration Co impurity

Abstract

A large linear magnetoresistance up to 600% at a magnetic field of 9 T was discovered in single HgSe:Co crystals with a low Co content (not exceeding 0.035 at. %). This was accompanied by a noticeable rise in relative magnetoresistance in comparison with undoped HgSe. An analysis of sample inhomogeneity is presented. Possible sources of linear magnetoresistance in HgSe:Co are discussed.

Linear colossal magnetoresistance and magnetic textures in LaTiO3 thin films on SrTiO3

“…The occurrence of LMR has been previously observed in studies on other materials, albeit with significantly reduced amplitude as compared to our results [44][45][46]. The scenarios that have been proposed to explain the LMR involve either quantum or classical effects.…”

Quantum linear magnetoresistance and magnetic-field-induced metal–insulator transition in the Weyl semimetal candidate HgSe

“…It is important to note that the quantum limit becomes a basic element for the emergence of the linear MR in HgSe. Unlike the ultrapure sample, in HgSe possessing n e = 2.5 × 10 17 cm −3 , linear MR was not observed, 44 which correlates with inaccessibility of the quantum limit for this sample in the magnetic field up to 12 T. Now, let us discuss the specifics of magnetotransport at relatively low temperatures, (0.4-4.2) K. As can be seen from Fig. 1(b), in this temperature range, MR(B) decreases in magnitude down to (6-8) × 10 3 % in B = 12 T, while losing linearity.…”