Three-dimensional nature of the band structure of 
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 measured by high-momentum-resolution photoemission spectroscopy

Xiong, Hongyu; Sobota, Jonathan; Yang, Shuolong; Soifer, Hadas; Gauthier, Alexandre; Lu, Ming‐Hui; Lv, Yang‐Yang; Yao, Shu‐Hua; Lü, Donghui; Hashimoto, M.; Kirchmann, Patrick S.; Chen, Y.-F.; Shen, Z.‐X.

doi:10.1103/physrevb.95.195119

Cited by 89 publications

(88 citation statements)

References 34 publications

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“…Note that the coexistence of holes and electrons in ZrTe 5 has been also revealed in previous ARPES or transport studies of ZrTe 5 [18][19][20][21]. Briefly speaking, there is a Fermi pocket at the Γ point and another trivial electron pocket along the YM edge in the first Brillouin zone of ZrTe 5 [18].…”

supporting

confidence: 67%

“…What makes ZrTe 5 more special is that it lies at the boundary between weak and strong topological insulators [17]. Whether ZrTe 5 is a real DSM or not is still under active investigation in the literature [18][19][20].In this work, we have performed systematic magneto-transport study of high-quality ZrTe 5 single crystals. Clear quantum MR oscillations were observed at low temperatures, revealing the existence of a nontrivial band with tiny effective mass in ZrTe 5 .…”

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confidence: 99%

mentioning

confidence: 99%

“…It is also noted that the existence of the nontrivial Berry phase is often regarded as a transport signature of the DSM phase in ZrTe 5 [13,15]. But recent ARPES and infrared spectroscopy studies of ZrTe 5 suggest that ZrTe 5 is more like a weak or strong topological insulator with a small gap at the Γ point at low temperatures, rather than the DSM [18][19][20]. This discrepancy suggests that the transport study alone cannot conclusively determine the nature of ZrTe 5 , even a nontrivial Berry phase is extracted from the analysis of SdH data.…”

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confidence: 99%

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Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals

et al. 2019

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Magneto-transport study has been performed in ZrTe 5 single crystals. The observed Shubnikov-de Hass quantum oscillation at low temperature clearly demonstrates the existence of a nontrivial band with small effective mass in ZrTe 5 . Furthermore, we also revealed the highly anisotropic nature of high-field Landau level splitting in ZrTe 5 , suggesting the dominant role of orbital contribution to the splitting. Besides these, an abnormal large enhancement of magnetoresistance appears at high temperatures, which is believed to arise from the Lifshitz transition induced two-carrier transport in ZrTe 5 . Our study provides more understanding of the physical properties of ZrTe 5 and sheds light on potential application of ZrTe 5 in spintronics.Dirac semimetals (DSMs) are three dimensional analogs of graphene, featuring gapless Dirac cones in the bulk states [1]. The well-studied DSMs, such as Na 3 Bi and Cd 3 As 2 , have been shown to exhibit ultra-high mobility, extremely large positive magnetoresistance (MR), surface Fermi arc states, and a novel negative MR related with the chiral anomaly in high energy physics [2-9]. Therefore, DSMs have triggered extensive studies exploring the potential applications in spintronics, such as magnetic sensors, as well as the intriguing Dirac fermion physics [1].Among various DSM candidates, ZrTe 5 is of particular interest. It has a layered crystal structure, which means that thickness-dependent physics can be easily accessed, even down to the ultrathin limit, i.e. one monolayer of ZrTe 5 [10,11]. Besides this, ZrTe 5 has been shown to exhibit many intriguing phenomena, such as the chiral anomaly induced negative MR [12], the nontrivial Berry phase revealed in quantum oscillation experiment [13], the anomalous Hall effect even with the magnetic field in-plane [14], and possible emergence of density wave states in the quantum limit [15,16]. What makes ZrTe 5 more special is that it lies at the boundary between weak and strong topological insulators [17]. Whether ZrTe 5 is a real DSM or not is still under active investigation in the literature [18][19][20].In this work, we have performed systematic magneto-transport study of high-quality ZrTe 5 single crystals. Clear quantum MR oscillations were observed at low temperatures, revealing the existence of a nontrivial band with tiny effective mass in ZrTe 5 . In the high field region, we also observed well-resolved Landau level splitting. It shows a very strong dependence on the tilting angle of the magnetic field, indicating the highly anisotropic nature of it, very different from previous transport studies [15]. Besides these, we also revealed an abnormal large enhancement of MR up to 820% at high temperatures, which was interpreted in terms of the Lifshitz transition induced two-carrier transport in ZrTe 5 and might be important for potential application of ZrTe 5 in spintronics.The ZrTe 5 single crystals we studied in this work were grown by the chemical vapor transport method. Stoichiometric proportions of high purity Zr (GRINM 99.9...

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confidence: 67%

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confidence: 99%

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confidence: 99%

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Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals

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“…This is linked to the very small energy scales characterizing the electronic band structure near the Fermi level. 4,11 Moreover, the samples seem to be significantly influenced by their preparation method. 12 High pressure can be an excellent probe in a layered system such as ZrTe 5 .…”

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confidence: 99%

Probing intraband excitations in ZrTe5 : A high-pressure infrared and transport study

Santos-Cottin¹,

Padlewski²,

Martino³

et al. 2020

Phys. Rev. B

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Zirconium pentatetelluride, ZrTe5, shows remarkable sensitivity to hydrostatic pressure. In this work we address the high-pressure transport and optical properties of this compound, on samples grown by flux and charge vapor transport. The high-pressure resistivity is measured up to 2 GPa, and the infrared transmission up to 9 GPa. The dc conductivity anisotropy is determined using a microstructured sample. Together, the transport and optical measurements allow us to discern band parameters with and without the hydrostatic pressure, in particular the Fermi level, and the effective mass in the less conducting, out-of-plane direction. The results are interpreted within a simple two-band model characterized by a Dirac-like, linear in-plane band dispersion, and a parabolic out-of-plane dispersion.arXiv:1912.00942v2 [cond-mat.mtrl-sci]

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Resonant Transmission through Topological Metamaterial Grating

et al. 2018

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Recently, artificial photonic structures that exhibit nontrivial topological properties have attracted growing attention due to their capability of achieving one-way backscatter immune transport of light. While photonic crystals are predominantly employed for achieving nontrivial topologies, effective medium approach based on metamaterials has been recently proposed for realizing topologically protected unidirectional surface states. In this article, a microscopic model to investigate the transmission of topological metamaterial grating is constructed based on the scattering processes involving unidirectional surface states. The numerically simulated transmission efficiency of the grating can be precisely reproduced by the model. The model demonstrates that the sharp transmission resonance of the grating results from the constructive interference of the topologically protected one-way surface states. The present work provides an intuitive picture for understanding the scattering processes and resonance behaviors of the topologically protected one-way surface states. Benefitting from the sharp spectral features of the supported resonances, the proposed grating structure may be potentially used for sensing applications.

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Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy

Cited by 89 publications

References 34 publications

Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals

Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals

Probing intraband excitations in ZrTe5 : A high-pressure infrared and transport study

Resonant Transmission through Topological Metamaterial Grating

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Three-dimensional nature of the band structure of ZrTe5 measured by high-momentum-resolution photoemission spectroscopy

Cited by 89 publications

References 34 publications

Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe5 crystals

Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe5 crystals

Probing intraband excitations in ZrTe5 : A high-pressure infrared and transport study

Resonant Transmission through Topological Metamaterial Grating

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Product

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Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals

Anisotropic Landau level splitting and Lifshitz transition induced magnetoresistance enhancement in ZrTe₅ crystals