Sixfold fermion near the Fermi level in cubic PtBi2

Thirupathaiah, S.; Kushnirenk, Y. S.; Koepernik, Klaus; Piening, B. R.; Buechner, B.; Aswartham, Saicharan; Brink, Jeroen van den; Борисенко, С. В.; Fulga, Ion Cosma

doi:10.21468/scipostphys.10.1.004

Cited by 13 publications

(4 citation statements)

References 59 publications

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“…For the interested reader we give an (incomplete) list of recent publications, which used the FPLO Wannier function module: [84]…”

Section: Related Citationsmentioning

confidence: 99%

Symmetry Conserving Maximally Projected Wannier Functions

Koepernik¹,

O.²,

Sun³

et al. 2021

Preprint

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“…For the interested reader we give an (incomplete) list of recent publications, which used the FPLO Wannier function module: [84]…”

Section: Related Citationsmentioning

confidence: 99%

Symmetry Conserving Maximally Projected Wannier Functions

Koepernik¹,

O.²,

Sun³

et al. 2021

Preprint

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“…However, the MR becomes linear at high fields, a behavior that is claimed to be associated with Dirac-like cones in the band structure [8]. Angle-resolved photoemission spectroscopy (ARPES) experiments along with density functional theory (DFT) show the existence of Dirac points close to the Fermi surface confirming β-PtBi 2 is a 3D Dirac semimetal [12,13].…”

Section: Introductionmentioning

confidence: 96%

Enhanced weak superconductivity in trigonal γ-PtBi₂

Zabala,

Correa,

Castro

et al. 2024

J. Phys.: Condens. Matter

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Electrical resistivity experiments show superconductivity at Tc= 1.1 K in a high-quality single crystal of trigonal γ-PtBi2, with an enhanced critical magnetic ﬁeld µ0Hc2(0) ≥ 1.5 Tesla and a low critical current-density Jc(0) ≈ 40 A/cm2 at H = 0. Both Tc and Hc2(0) are the highest reported values for stoichiometric bulk samples at zero pressure. We found a weak Hc2 anisotropy with Γ = Hab c2 /Hc c2 < 1, which is unusual among superconductors. Under a magnetic ﬁeld, the superconducting transition becomes broader and asymmetric. Along with the low critical currents, this observation suggests an inhomogeneous superconducting state. In fact, no trace of superconductivity is observed through ﬁeld-cooling–zero-ﬁeld-cooling magnetization experiments.experiments.

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“…Moreover, thanking to the special crystal symmetries in topological materials, three-fold and four-fold fermions have been proposed theoretically [14] and then successfully observed in experiments [18,19]. Considering further the spin-orbit coupling (SOC), the inspiring sextuple fermions were predicted in PdSb 2 [20] and PtBi 2 [21], and possess many nontrivial Fermi surface states rendering the problem very complicated for a simple understanding. It is stressed that even without SOC, this kind of six-fold fermions can be existed in some realistic materials such as Li 12 Mg 3 Si 4 [22].…”

Section: Introductionmentioning

confidence: 99%

Topological nodal-link phonons, three-fold, Dirac and six-fold nodal-point phonons in the insulator SiO₂

Liu

Wang

2022

New J. Phys.

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By using first-principles calculations and symmetry analysis, we study the topologically nontrivial features of sextuple nodal-point phonons together with other kinds of topological phonons in realistic materials. The sextuple nodal-point phonons in all 230 space groups, enumerated in this paper, are localized at the boundaries of the three-dimensional Brillouin zone (BZ), and protected both by time-reversal symmetry ($\cal T$) and little-group symmetries. Moreover, in a realistic material sample of insulator SiO$_2$, we find that the sextuple nodal-point phonons exist at the high-symmetry point \emph{H} of the first BZ, and generate four-fold surface states. Interestingly, owing to the special crystal symmetries in SiO$_2$, triple nodal-point phonons and Dirac phonons exist at the point $\Gamma$ and \emph{P}, respectively, and exhibit exotic quadruple surface states. More than these, the topological phononic nodal links also appear around the point $\Gamma$, and exhibit drumhead like surface states in this material. Our theoretical work not only proposes an effective way to search for multi-fold topological phonons including Dirac phonons and sextuple nodal-point phonons, but also presents a realistic material sample to realize the coexistence of multiple nodal-point and nodal-link phonons.

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Sixfold fermion near the Fermi level in cubic PtBi2

Cited by 13 publications

References 59 publications

Symmetry Conserving Maximally Projected Wannier Functions

Symmetry Conserving Maximally Projected Wannier Functions

Enhanced weak superconductivity in trigonal γ-PtBi₂

Topological nodal-link phonons, three-fold, Dirac and six-fold nodal-point phonons in the insulator SiO₂

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Sixfold fermion near the Fermi level in cubic PtBi2

Cited by 13 publications

References 59 publications

Symmetry Conserving Maximally Projected Wannier Functions

Symmetry Conserving Maximally Projected Wannier Functions

Enhanced weak superconductivity in trigonal γ-PtBi2

Topological nodal-link phonons, three-fold, Dirac and six-fold nodal-point phonons in the insulator SiO2

Contact Info

Product

Resources

About

Enhanced weak superconductivity in trigonal γ-PtBi₂

Topological nodal-link phonons, three-fold, Dirac and six-fold nodal-point phonons in the insulator SiO₂