NMR Evidence for the Topologically Nontrivial Nature in a Family of Half-Heusler Compounds

Zhang, Xiaoming; Hou, Zhipeng; Wang, Yue; Xu, Guizhou; Shi, Chenglong; Liu, Enke; Xi, Xuekui; Wang, Wenhong; Wu, Guangheng; Zhang, Xixiang

doi:10.1038/srep23172

Cited by 44 publications

(19 citation statements)

References 38 publications

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“…The history of Heusler compounds can be traced back to 1903 [ 9 ]. Normally, Heusler compounds can be divided into three types: The ternary Heusler materials XYZ [ 10 , 11 , 12 , 13 ], the full-Heusler materials X 2 YZ [ 14 , 15 , 16 ], and the equiatomic quaternary Heusler (EQH) materials XYMZ [ 17 , 18 , 19 , 20 ], where X, Y, M are transition-metal elements. By replacing an X with M, the Heusler system can be changed from full-Heusler to EQH.…”

Section: Introductionmentioning

confidence: 99%

Electronic, Magnetic, Half-Metallic, and Mechanical Properties of a New Equiatomic Quaternary Heusler Compound YRhTiGe: A First-Principles Study

Han

et al. 2018

Materials

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We apply First-principles theory to study the electronic structure as well as the magnetic and mechanical characteristics of YRhTiGe, a newly-designed Y-based quaternary equiatomic Heusler compound. This compound is half-metallic in nature with a ferromagnetic ground state. The total magnetic moment of YRhTiGe is 2 μB and it obeys the Slater-Pauling rule, Mt = Zt − 18, where Mt and Zt are the total magnetic moment and total number of valence electrons, respectively. The magnetic and half-metallic behaviors at its equilibrium and strained lattice constants have been discussed in detail. In addition, for FM-type YRhTiGe, its polycrystalline mechanical features such as Poisson’s ratio, Lame constants, Kleinman parameter and hardness, are also computed according to the well-known Voigt-Reuss-Hill approximation. We investigate the mechanical anisotropy of YRhTiGe using the directional dependences of the Young’s modulus and the shear modulus. Finally, we prove this compound is structurally and mechanically stable. This theoretical investigation provides further insight into the application of Y-based compounds as spintronic materials.

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Section: Introductionmentioning

confidence: 99%

Electronic, Magnetic, Half-Metallic, and Mechanical Properties of a New Equiatomic Quaternary Heusler Compound YRhTiGe: A First-Principles Study

Han

et al. 2018

Materials

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“…YPdBi is a well-established topologically trivial half-Heusler system 7 – 9 based on nuclear magnetic resonance 21 – 24 , electron spin resonance 25 , 26 and from bulk band structure calculated using density functional theory (DFT) 22 . Although, bulk unstrained YPdBi is topologically trivial, interestingly it was theoretically predicted to undergo a strain-driven transition to a non-trivial state 9 .…”

Section: Introductionmentioning

confidence: 99%

Strain driven emergence of topological non-triviality in YPdBi thin films

Bhardwaj

Bhattacharya

Srivastava

et al. 2021

Sci Rep

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Half-Heusler compounds exhibit a remarkable variety of emergent properties such as heavy-fermion behaviour, unconventional superconductivity and magnetism. Several of these compounds have been predicted to host topologically non-trivial electronic structures. Remarkably, recent theoretical studies have indicated the possibility to induce non-trivial topological surface states in an otherwise trivial half-Heusler system by strain engineering. Here, using magneto-transport measurements and first principles DFT-based simulations, we demonstrate topological surface states on strained [110] oriented thin films of YPdBi grown on (100) MgO. These topological surface states arise in an otherwise trivial semi-metal purely driven by strain. Furthermore, we observe the onset of superconductivity in these strained films highlighting the possibility of engineering a topological superconducting state. Our results demonstrate the critical role played by strain in engineering novel topological states in thin film systems for developing next-generation spintronic devices.

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“…the Γ point, similar to HgTe 41–45 . In recent years, this non-trivial behavior are confirmed by NMR and ARPES experiments 28,46–48 .…”

Section: Introductionmentioning

confidence: 64%

Electronic structure of the PrNiBi half-Heusler system based on the σGGA + U method

Mikaeilzadeh

Tavana

Khoeini

2019

Sci Rep

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In this works, we study the electronic structure and magnetic properties of the Pr-Ni-Bi half-Heusler systems based on density functional theory. We use the σ GGA + U scheme to consider the effects of on-site electron-electron interactions. Results show that in contrast to the rough estimation of the total magnetic moment of the unit cell, based on the Slater-Pauling behavior in the half-Heusler systems, this system has an antiferromagnetic ground state because of the localized Pr-f electrons. By increasing the magnitude of the effective U parameter, band-inversion occurs in the band structure of this system, which shows the possibility of topological state occurrence.

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NMR Evidence for the Topologically Nontrivial Nature in a Family of Half-Heusler Compounds

Cited by 44 publications

References 38 publications

Electronic, Magnetic, Half-Metallic, and Mechanical Properties of a New Equiatomic Quaternary Heusler Compound YRhTiGe: A First-Principles Study

Electronic, Magnetic, Half-Metallic, and Mechanical Properties of a New Equiatomic Quaternary Heusler Compound YRhTiGe: A First-Principles Study

Strain driven emergence of topological non-triviality in YPdBi thin films

Electronic structure of the PrNiBi half-Heusler system based on the σGGA + U method

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