Signature of Strong Spin-Orbital Coupling in the Large Nonsaturating Magnetoresistance Material<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>WTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>

Jiang, Juan; Tang, Feng; Pan, Xingchen; Liu, H. M.; Niu, X. H.; Wang, Y.X.; Xu, D. F.; Yang, Haitao; Xie, B. P.; Song, Fengqi; Dudin, Pavel; Kim, T. K.; Hoesch, Moritz; Das, Pranab K.; Vobornik, I.; Wan, Xiangang; Feng, D. L.

doi:10.1103/physrevlett.115.166601

Cited by 234 publications

(172 citation statements)

References 31 publications

Supporting

Mentioning

146

Contrasting

Order By: Relevance

“…The transport properties of these type-II WSM candidates have attracted considerable attention due to the observation of extremely large and non-saturating MR in WTe 2 15-17 and in MoTe 2 18-21 . The coexistence of electron and hole pockets of approximately the same size was observed in WTe 2 by angleresolved photo-emission spectroscopy (ARPES) 22,23 , suggesting near perfect carrier compensation at low temperatures. Perfect carrier compensation was claimed 15 to be responsible for the magnetoresistivity of WTe 2 .…”

Section: A Weyl Semi-metal (Wsm)mentioning

confidence: 94%

Hall effect within the colossal magnetoresistive semimetallic state ofMoTe2

et al. 2016

View full text Add to dashboard Cite

Here, we report a systematic study on the Hall-effect of the semi-metallic state of bulk MoTe2, which was recently claimed to be a candidate for a novel type of Weyl semi-metallic state. The temperature (T ) dependence of the carrier densities and of their mobilities, as estimated from a numerical analysis based on the isotropic two-carrier model, indicates that its exceedingly large and non-saturating magnetoresistance may be attributed to a near perfect compensation between the densities of electrons and holes at low temperatures. A sudden increase in hole density, with a concomitant rapid increase in the electron mobility below T ∼ 40 K, leads to comparable densities of electrons and holes at low temperatures suggesting a possible electronic phase-transition around this temperature.

show abstract

Section: A Weyl Semi-metal (Wsm)mentioning

confidence: 94%

Hall effect within the colossal magnetoresistive semimetallic state ofMoTe2

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Identifying the fundamental energy scales related to T m and T i in the universal phase diagram of XMR remains an interesting open question. (34). Fig.…”

Section: Discussionmentioning

confidence: 99%

Temperature−field phase diagram of extreme magnetoresistance

Tafti

Gibson

Kushwaha

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

103

View full text Add to dashboard Cite

The recent discovery of extreme magnetoresistance (XMR) in LaSb introduced lanthanum monopnictides as a new platform to study this effect in the absence of broken inversion symmetry or protected linear band crossing. In this work, we report XMR in LaBi. Through a comparative study of magnetotransport effects in LaBi and LaSb, we construct a temperature−field phase diagram with triangular shape that illustrates how a magnetic field tunes the electronic behavior in these materials. We show that the triangular phase diagram can be generalized to other topological semimetals with different crystal structures and different chemical compositions. By comparing our experimental results to band structure calculations, we suggest that XMR in LaBi and LaSb originates from a combination of compensated electron−hole pockets and a particular orbital texture on the electron pocket. Such orbital texture is likely to be a generic feature of various topological semimetals, giving rise to their small residual resistivity at zero field and subject to strong scattering induced by a magnetic field.extreme magnetoresistance | topological semimetal | orbital texture M aterials with large magnetoresistance (MR) have applications in electronics as magnetic memories (1, 2), in spintronics as magnetic valves (3), and in industry as magnetic sensors or magnetic switches (4, 5). Recent reports of extreme magnetoresistance (XMR) in several nonmagnetic semimetals have attracted attention due to its distinction from giant and collosal MR in magnetic semiconductors (2, 6). XMR is observed in Dirac semimetals such as Na 3 Bi or Cd 3 As 2 (7, 8), Weyl semimetals such as NbP, NbAs, or TaAs (9-11), and layered semimetals such as WTe 2 , NbSb 2 , or PtSn 4 (12-16). The recent discovery of XMR in LaSb that does not belong to any of these categories shows that XMR is a ubiquitous phenomenon observed in seemingly unrelated materials (17). It also clearly underlines that the mechanism for XMR is not understood. The present article is a first attempt to unify the phenomenology of XMR in seemingly unrelated materials, to provide a common phase diagram for XMR, and to elucidate its underlying mechanism. We hope that this will enable theorists to develop a model capable of describing the underlying physics, once all of the salient experimental features are captured.We report the discovery of XMR in LaBi with similar crystal structure and chemical composition to LaSb. Fig. 1 shows the simple rock salt structure of lanthanum monopnictides. Through a comparative study of longitudinal and transverse magnetotransport in LaSb and LaBi, we construct a characteristic triangular T-H phase diagram for XMR in lanthanum monopnictides. Our band structure calculations, quantum oscillations, and Hall Effect measurements suggest that XMR is rooted in a combination of compensated electron−hole pockets and a mixed orbital texture within the electron pockets. The orbital texture is a result of lanthanum d states crossing the pnictogen p states. Spin−orbit coupling then opens a...

show abstract

“…Although the electronic structures of WTe 2 [28][29][30] and Mo x W 1−x Te 2 [31] have been experimentally studied, so far there is no conclusive evidence on the existence of topological Fermi arcs. Here by combining two complementary surface sensitive probes -ARPES and STM, we provide direct experimental evidence of the topological Fermi arcs at the boundary between electron and hole pockets in the T d phase of MoTe 2 , establishing it as a type-II Weyl semimetal.…”

mentioning

confidence: 99%