# Prediction of ideal triple degenerate points in HfIrAs and HfIrBi

@article{Song2018PredictionOI, title={Prediction of ideal triple degenerate points in HfIrAs and HfIrBi}, author={Zhigang Song and Claudia Felser and Yan Sun}, journal={Physical Review B}, year={2018} }

In this study, two ideal triple degenerate point (TDP) semimetals were predicted, namely, HfIrAs and HfIrBi, that exhibit clean TDPs around the fermi level. At the atomic level, the origin of the TDP was analyzed, and when combined with the low-energy effective 4-band model, it was found that the bulk inversion asymmetry directly determines the formation of the TDP for cubic crystals. The projected surface states and corresponding patterns of the fermi arcs with and without tensile strain were…

## 6 Citations

### Quaternary Heusler alloy: An ideal platform to realize triple point fermions

- Materials SciencePhysical Review B
- 2019

The existence of three fold rotational, mirror and time reversal symmetries often give rise to the triply degenerate nodal point (TP) in the band structure of a material. Based on point group…

### Prediction of threefold fermions in a nearly ideal Dirac semimetal BaAgAs

- PhysicsPhysical Review Materials
- 2019

Materials with triply-degenerate nodal points in their low-energy electronic spectrum produce crystalline-symmetry-enforced three-fold fermions, which conceptually lie between the two-fold Weyl and…

### Design triple points, nexus points, and related topological phases by stacking monolayers

- PhysicsApplied Physics Letters
- 2019

Triple points and nexus points are two interesting topological phases, which have been reported in some three-dimensional (3D) materials. Here, we propose that triple points, nexus points and related…

### Electronic, Elastic, Vibrational and Thermodynamic Properties of HfIrX (X = As, Sb and Bi) Compounds: Insights from DFT-Based Computer Simulation

- Chemistry, Materials ScienceJournal of Electronic Materials
- 2020

Ab-initio calculations were performed to reveal and thoroughly understand the structural, electronic, elastic, thermodynamic and vibrational properties of HfIrX (X = As, Sb and Bi) compounds in the…

### High-throughput first-principle prediction of collinear magnetic topological materials

- Materials Sciencenpj Computational Materials
- 2022

The success of topological band theory and symmetry-based topological classification significantly advances our understanding of the Berry phase. Based on the critical concept of topological…

### Multiple fermions in MoP

- PhysicsModern Physics Letters B
- 2019

Based on the first-principles calculation, we report that the WC-type MoP is a new type of topological semimetal. It can host Weyl semimetal phase with six pairs of Weyl points (WPs) in the first…

## References

SHOWING 1-10 OF 58 REFERENCES

### Coexistence of topological nodal lines,Weyl points, and triply degenerate points in TaS

- Physics
- 2017

We theoretically propose that, the single crystal formed TaS is a new type of topological semimetal, hosting ring-shaped gapless nodal lines and triply degenerate points (TDPs) in the absence of…

### Coexistence of Weyl fermion and massless triply degenerate nodal points

- Physics
- 2016

By using first-principles calculations, we propose that WC-type ZrTe is a new type of topological semimetal (TSM). It has six pairs of chiral Weyl nodes in its first Brillouin zone, but it is…

### Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides

- Physics
- 2015

Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of…

### Triply degenerate nodal points and topological phase transitions in NaCu3Te2

- Physics
- 2017

Quasiparticle excitations of free electrons in condensed-matter physics, characterized by the dimensionality of the band crossing, can find their elementary-particle analogs in high-energy physics,…

### Prediction of Triple Point Fermions in Simple Half-Heusler Topological Insulators.

- PhysicsPhysical review letters
- 2017

It is found that many half-Heusler compounds exhibit multiple triple points along four independent C_{3} axes, through which the doubly degenerate conduction bands and the nondegenerate valence band cross each other linearly nearby the Fermi energy.

### Molybdenum Carbide: A Stable Topological Semimetal with Line Nodes and Triply Degenerate Points

- Physics
- 2017

We propose that the hexagonal crystal form of MoC is a stable and new type of topological semimetal. It hosts an exotic Fermi surface consisting of two concentric nodal rings in the presence of…

### Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates

- Physics
- 2011

We investigate novel phases that emerge from the interplay of electron correlations and strong spin-orbit interactions. We focus on describing the topological semimetal, a three-dimensional phase of…

### Spin texture on the Fermi surface of tensile-strained HgTe

- Physics
- 2013

We present ab initio and k · p calculations of the spin texture on the Fermi surface of tensile-strained HgTe, which is obtained by stretching the zinc-blende lattice along the (111) axis.…

### Dirac semimetal and topological phase transitions in A 3 Bi ( A = Na , K, Rb)

- Physics, Materials Science
- 2012

Three-dimensional (3D) Dirac point, where two Weyl points overlap in momentum space, is usually unstable and hard to realize. Here we show, based on the first-principles calculations and effective…

### Experimental discovery of Weyl semimetal TaAs

- PhysicsScience China Materials
- 2015

In 1929, H. Weyl proposed that the massless solution of the Dirac equation represents a pair of a new type of particles, the so-called Weyl fermions. However, their existence as a fundamental…