Bulk Fermi surface of the Weyl type-II semimetallic candidate 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>NbIrTe</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>

Schönemann, R.; Chiu, Yu-Che; Zheng, Wenkai; Quito, Victor L.; Sur, Shouvik; McCandless, Gregory T.; Chan, Julia Y.; Balicas, Luis

doi:10.1103/physrevb.99.195128

Cited by 27 publications

(32 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With 24 atoms per unit cell, 69 phonon modes are possible in this structure 40 . While several magneto-transport measurements in late 2019 have shown non saturating magneto-resistance at low temperature, and quantum oscillations 41 , 42 which are consistent with a complex Fermi surface, there are no angle-resolved photoemission spectroscopy (ARPES) measurements to investigate the expected surface Fermi arcs or band crossings expected in this material.…”

Section: Introductionmentioning

confidence: 90%

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Shojaei

Pournia

et al. 2021

Sci Rep

View full text Add to dashboard Cite

There is tremendous interest in measuring the strong electron–phonon interactions seen in topological Weyl semimetals. The semimetal NbIrTe4 has been proposed to be a Type-II Weyl semimetal with 8 pairs of opposite Chirality Weyl nodes which are very close to the Fermi energy. We show using polarized angular-resolved micro-Raman scattering at two excitation energies that we can extract the phonon mode dependence of the Raman tensor elements from the shape of the scattering efficiency versus angle. This van der Waals semimetal with broken inversion symmetry and 24 atoms per unit cell has 69 possible phonon modes of which we measure 19 modes with frequencies and symmetries consistent with Density Functional Theory calculations. We show that these tensor elements vary substantially in a small energy range which reflects a strong variation of the electron–phonon coupling for these modes.

show abstract

Section: Introductionmentioning

confidence: 90%

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Shojaei

Pournia

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Theoretical calculations indicate that NbIrTe4 has a more complicated electronic structure (16 Weyl points in the Brillouin zone) [5] than TaIrTe4 (4 Weyl points in the Brillouin zone) [15,25]. The presence of Weyl points in NbIrTe4, accompanied by the common features of a large non-saturating MR effect, have been supported experimentally [26]. Pressure is an important tuning parameter that can be utilized to alter the lattice and corresponding electronic structures of a material and therefore influence its electrical transport properties.…”

mentioning

confidence: 97%

“…High-quality single crystals of NbIrTe4 were grown by a Te flux method as described in [26]. The high-pressure experimental details can be found in the Supplementary Material [33].…”

mentioning

confidence: 99%

Observation of nearly identical superconducting transition temperatures in the pressurized Weyl semimetals MIrTe4 ( M=Nb and Ta)

et al. 2021

Self Cite

View full text Add to dashboard Cite

Here we report the observation of pressure-induced superconductivity in type-II Weyl semimetal (WSM) candidate NbIrTe4 and the evolution of its Hall coefficient (RH), magnetoresistance (MR), and lattice with increasing pressure to ~57 GPa. These results provide a significant opportunity to investigate the universal high-pressure behavior of ternary WSMs, including the sister compound TaIrTe4 that has been known through our previous studies. We find that the pressure-tuned evolution from the WSM to the superconducting (SC) state in these two compounds exhibit the same trend, i.e., a pressure-induced SC state emerges from the matrix of the non-superconducting WSM state at ~ 27 GPa, and then the WSM state and the SC state coexist up to 40 GPa. Above this pressure, an identical high-pressure behavior, characterized by almost the same value of RH and MR in its normal state and the same value of Tc in its SC state, appears in both compounds. Our results not only reveal a universal connection between the WSM state and SC state, but also demonstrate that NbIrTe4 and TaIrTe4 can make the same contribution to the normal and SC states that inhabit in the high-pressure phase, although these two compounds have dramatically different topological band structure at ambient pressure.

show abstract

“…Note Added : In the proof of this work, we recently noticed another work investigating the band topology of NbIrTe 4 through quantum oscillations of the magnetoresistivity component …”

Section: Resultsmentioning

confidence: 94%

Nonsaturating Magnetoresistance and Nontrivial Band Topology of Type‐II Weyl Semimetal NbIrTe₄

Zhou

et al. 2019

Adv Elect Materials

View full text Add to dashboard Cite

momentum directions. In the presence of broken time-reversal symmetry (TRS) or space-inversion symmetry, Dirac semimetals evolve into Weyl semimetals and Dirac points split into pairs of Weyl points due to the lifted spin degeneracy. [8,9] For both the Dirac and Weyl semimetals, due to the coexistence of the conventional charge carriers and relativistic carriers, interesting transport phenomena can often be observed, for example, chiral anomaly [10][11][12] and ultrahigh carrier mobilities. [13] Accordingly, transport studies are viewed as an important way to explore the unique scattering mechanism of charge carriers in Dirac/Weyl semimetals. In addition, through transport quantum oscillations, one can get deep insights into the underlying band topology of Dirac/Weyl semimetals.In general, Weyl semimetals can be classified into two types: the standard type I which possesses a point-like Fermi surface, and the type II with strongly tilted Weyl cones induced by the broken Lorentz symmetry. [14] The Weyl points for type II Weyl semimetals appear only at the contact of electron and hole pockets. The qualitatively distinct band topology of type II Weyl semimetals can lead to marked differences in physical properties, such as the direction restricted chiral anomaly and exotic superconductivity. [15][16][17] To date, several noncentrosymmetric material systems, for example, the transition metal dichalcogenides T M X 2 (T M = W, Mo, etc.; X = Se, Te), [14,[18][19][20] the diphosphides (Mo, W)P 2 , [21] LaAlGe, [22] etc., have been considered to be type II Weyl semimetals, while most of them display complex band structures with multiple Weyl points, which adds difficulties in the conventional transport studies of these materials. Moreover, in many Weyl semimetals, the Weyl points are located deeply below the Fermi level, which often hinders the observation of intrinsic characteristics associated with the relativistic carriers.Very recently, ternary MTTe 4 (M = Nb or Ta; T = Ir or Rh) compounds were theoretically predicted as a new series of type II Weyl semimetals, [23,24] and verified experimentally in TaIrTe 4 . [25][26][27] In comparison with the previous type II Weyl semimetals, the angle-resolved photoemission spectroscopy (ARPES) data and band calculation of TaIrTe 4 suggests the existence of only four Weyl points, [24,26] which is the minimum number of Weyl points allowed for a time-reversal invariant Weyl semimetals, characterized by nodal points in the bulk and Fermi arc states on the surface, have recently attracted extensive attention due to their potential application as materials for low-energy-consumption electronics. The thermodynamic and transport properties of a theoretically predicted Weyl semimetal NbIrTe 4 is measured in high magnetic fields up to 35 T and low temperatures down to 0.4 K. Remarkably, NbIrTe 4 exhibits a nonsaturating transverse magnetoresistance that follows a power-law dependence in B. Low-field Hall measurements reveal that hole-like carriers dominate the transport for T > 80 K, while...

show abstract

Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4

Cited by 27 publications

References 37 publications

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Observation of nearly identical superconducting transition temperatures in the pressurized Weyl semimetals MIrTe4 ( M=Nb and Ta)

Nonsaturating Magnetoresistance and Nontrivial Band Topology of Type‐II Weyl Semimetal NbIrTe₄

Contact Info

Product

Resources

About

Bulk Fermi surface of the Weyl type-II semimetallic candidate NbIrTe4

Cited by 27 publications

References 37 publications

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Observation of nearly identical superconducting transition temperatures in the pressurized Weyl semimetals MIrTe4 ( M=Nb and Ta)

Nonsaturating Magnetoresistance and Nontrivial Band Topology of Type‐II Weyl Semimetal NbIrTe4

Contact Info

Product

Resources

About

Nonsaturating Magnetoresistance and Nontrivial Band Topology of Type‐II Weyl Semimetal NbIrTe₄