Magneto-transport and electronic structures of BaZnBi<sub>2</sub>

Wang, Yi‐Yan; Guo, Peng‐Jie; Yu, Qiao-He; Xu, Sheng; Liu, Kai; Xia, Tian‐Long

doi:10.1088/1367-2630/aa95e7

Cited by 15 publications

(11 citation statements)

References 79 publications

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“…54 we did not find any clear evidence on the presence of Dirac states. Thus, our experimental observation on the absence of gapless Dirac states in this compound is in very good agreement with previous reports on this system [52,53].…”

Section: Resultssupporting

confidence: 93%

“…Despite the property of linear magnetoresistance in BaZnBi 2 , the presence of Dirac states near the Fermi level in this system is not yet established. While some studies do not find evidence of the Dirac states [52,53], the other ones report the existence Dirac states [54] in this system. Since BaZnBi 2 is a nonmagnetic system and yet shows the linear magnetoresistance, it is an ideal system to examine the relation between the linear magnetoresistance, the magnetism, and the possible existence of the Dirac states.…”

Section: A Introductionmentioning

confidence: 54%

Section: Resultsmentioning

confidence: 99%

“…Next, BaZnBi 2 is known to show a large linear magnetoresistance under the external magnetic fields [52][53][54]. This property is attributed to the electron-hole compensation [52] and the linear dispersive Dirac states [54]. The charge compensation theory is widely applied for understanding the quadratic field dependent magnetoresistance in the bulk crystals [62].…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, these compounds show unsaturated linear magnetoresistance under the external magnetic fields which are attributed to the Dirac fermions [49,50] or to the proximity of long range magnetic ordering [40,51]. Interestingly, isostructural to AMnBi 2 , BaZnBi 2 is a nonmagnetic compound but yet shows linear magnetoresistance [52]. Despite the property of linear magnetoresistance in BaZnBi 2 , the presence of Dirac states near the Fermi level in this system is not yet established.…”

Section: A Introductionmentioning

confidence: 95%

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Massive Dirac fermions in layered BaZnBi$_2$

Thirupathaiah,

Efremov,

Kushnirenko

et al. 2018

Preprint

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Using angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) we study the electronic structure of layered BaZnBi2. Our experimental results show no evidence of Dirac states in BaZnBi2 originated either from the bulk or the surface. The calculated band structure without spin-orbit interaction shows several linear dispersive band crossing points throughout the Brillouin zone. However, as soon as the spin-orbit interaction is turned on, the band crossing points are significantly gapped out. The experimental observations are in good agreement with our DFT calculations. These observations suggest that the Dirac fermions in BaZnBi2 are trivial and massive. We also observe experimentally that the electronic structure of BaZnBi2 comprises of several linear dispersive bands in the vicinity of Fermi level dispersing to a wider range of binding energy.

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Section: Resultssupporting

confidence: 93%

Section: A Introductionmentioning

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: A Introductionmentioning

confidence: 95%

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Massive Dirac fermions in layered BaZnBi$_2$

Thirupathaiah,

Efremov,

Kushnirenko

et al. 2018

Preprint

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Extremely Large Anomalous Hall Conductivity and Unusual Axial Diamagnetism in a Quasi‐1D Dirac Material La₃MgBi₅

Yi,

Ouyang,

Guo

et al. 2024

Advanced Materials

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Anomalous Hall effect (AHE), one of the most important electronic transport phenomena, generally appears in ferromagnetic materials but is rare in materials without magnetic elements. Here, a study of La3MgBi5 is presented, whose band structure carries multitype Dirac fermions. Although magnetic elements are absent in La3MgBi5, the signals of AHE can be observed. In particular, the anomalous Hall conductivity is extremely large, reaching 42,356 Ω−1 cm−1 with an anomalous Hall angle of 8.8%, the largest one that has been observed in the current AHE systems. The AHE is suggested to originate from the combination of skew scattering and Berry curvature. Another unique property discovered in La3MgBi5 is the axial diamagnetism. The diamagnetism is significantly enhanced and dominates the magnetization in the axial directions, which is the result of the restricted motion of the Dirac fermion at the Fermi level. These findings not only establish La3MgBi5 as a suitable platform to study AHE and quantum transport but also indicate the great potential of 315‐type Bi‐based materials for exploring novel physical properties.

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Ln₃MBi₅ (Ln=Pr, Nd, Sm; M=Zr, Hf): Intermetallics with Hypervalent Bismuth Chains

Khoury

Song

Schoop

2022

Zeitschrift anorg allge chemie

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We report five new isostructural compounds in the Ln3MBi5 (Ln=Pr, Nd, Sm; M=Zr, Hf) family, and compare them to the recently reported Sm3ZrBi5 analogue. Ln3MBi5 crystallizes in the P63/mcm space group, hosting the anti‐Hf5Sn3Cu structure type. The one‐dimensional structure consists of hypervalent Bi2− chains and face‐sharing MBi6 octahedra that form chains along the c axis. A framework of Ln3+ cations charge balances and separates the two motifs. The Bi−Bi and M−Bi bond lengths decrease as the Ln cation becomes smaller across the period, but there is almost no diﬀerence in either bond length when the identity of M changes, as expected because Zr and Hf have the exact same radii due to lanthanide contraction. We present a structural stability map showing the limits of cation stability in the structure, with La3+ and U3+ as the largest cations and Sm3+ as the smallest cation. X‐ray photoelectron spectra suggest ambiguous valence states in the Ln3MBi5 structure depending on the identity of the M atom. This work further expands the Ln3MBi5 family and sheds new light on how their bonding behavior may vary based on chemical composition.

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Magneto-transport and electronic structures of BaZnBi₂

Cited by 15 publications

References 79 publications

Massive Dirac fermions in layered BaZnBi$_2$

Massive Dirac fermions in layered BaZnBi$_2$

Extremely Large Anomalous Hall Conductivity and Unusual Axial Diamagnetism in a Quasi‐1D Dirac Material La₃MgBi₅

Ln₃MBi₅ (Ln=Pr, Nd, Sm; M=Zr, Hf): Intermetallics with Hypervalent Bismuth Chains

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Magneto-transport and electronic structures of BaZnBi2

Cited by 15 publications

References 79 publications

Massive Dirac fermions in layered BaZnBi$_2$

Massive Dirac fermions in layered BaZnBi$_2$

Extremely Large Anomalous Hall Conductivity and Unusual Axial Diamagnetism in a Quasi‐1D Dirac Material La3MgBi5

Ln3MBi5 (Ln=Pr, Nd, Sm; M=Zr, Hf): Intermetallics with Hypervalent Bismuth Chains

Contact Info

Product

Resources

About

Magneto-transport and electronic structures of BaZnBi₂

Extremely Large Anomalous Hall Conductivity and Unusual Axial Diamagnetism in a Quasi‐1D Dirac Material La₃MgBi₅

Ln₃MBi₅ (Ln=Pr, Nd, Sm; M=Zr, Hf): Intermetallics with Hypervalent Bismuth Chains