Phonon limited electronic transport in Pb

Rittweger, Florian; Hinsche, N. F.; Mertig, Ingrid

doi:10.1088/1361-648x/aa7b56

Cited by 16 publications

(13 citation statements)

References 51 publications

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“…2 and Eq. 4 is ensured by employing adaptive tetrahedron schemes 17,18,45 and using, depending on the topology of the iso-energetic surface, a few 10 4 (10 3 ) k-points and 10 5 (10 5 ) q-points for bulk and monolayer, respectively 8 . In Fig.…”

Section: Transport Propertiesmentioning

confidence: 99%

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂

Hinsche¹,

Thygesen²

2017

2D Mater.

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Transition metal dichalcogenides have recently emerged as promising two-dimensional materials with intriguing electronic properties. Existing calculations of intrinsic phonon-limited electronic transport so far have concentrated on the semicondcucting members of this family. In this paper we extend these studies by investigating the influence of electron-phonon coupling on the electronic transport properties and band renormalization of prototype inherent metallic bulk and monolayer TaS2. Based on density functional perturbation theory and semi-classical Boltzmann transport calculations, promising room temperature mobilities and sheet conductances are found, which can compete with other established 2D materials, leaving TaS2 as promising material candidate for transparent conductors or as atomically thin interconnects. Throughout the paper, the electronic and transport properties of TaS2 are compared to those of its isoelectronic counterpart TaSe2 and additional informations to the latter are given. We furthermore comment on the conventional superconductivity in TaS2, where no phonon-mediated enhancement of TC in the monolayer compared to the bulk state was found. A. IntroductionSucceeding the many advances in fundamental science and applications of graphene, other two-dimensional materials, especially the transition-metal dichalcogenides (TMDs), have attracted remarkable interest for their appealing electrical, optical and mechanical properties. TMDs form layered compounds having a metal layer sandwiched between two chalcogen layers. These monolayers are weakly bound to each other by the dispersive van der Waals interaction, leading to a quasi-twodimensional behavior in the monolayers 1,2 . Among the TMDs, exfoliated semi-conducting materials, e.g. MoS 2 and WS 2 , have been extensively in focus for their promising electronic mobilities and thus a high potential in thin-film transistor applications [3][4][5] . Recently metallic TMDs are in focus for their potential as transparent conductive electrodes and gained increasing importance for information-, optoelectronic-and energy-applications 6,7 . Crucial requirements for these are high electrical conductivity and high transparency; properties that are often contradicting.Based on density functional theory and semi-classical Boltzmann transport, we will elaborate and discuss the influence of electron-phonon coupling onto the electronic transport properties and band renormalization of prototype metallic bulk and monolayer TaS 2 and compare it to conventionally used two-dimensional and bulk materials. Additional details on to the isoelectronic counterpart monolayer TaSe 2 are given along the discussion and can be found in the supplemental material 8 . Furthermore the influence of low-dimensionality on the phononmediated superconductivity in metallic TaS 2 will be discussed. While the Mermin-Wagner theorem 9-11 suggests that in two-dimensional systems no superconductivity, or even an enhancement compared to its bulk state, should be observed, opposite trends have bee...

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Section: Transport Propertiesmentioning

confidence: 99%

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂

Hinsche¹,

Thygesen²

2017

2D Mater.

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“…Relativistic effects, e.g., spin-orbit coupling, were treated self-consistently and are accounted for in all calculations. Based on the electronic and vibrational properties, the el-ph coupling was obtained within a modified version of the EPW code [16,17], either for the freestanding SL WS 2 or for the states in the SL in the presence of the Au(111) substrate.…”

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confidence: 99%

Spin-dependent electron-phonon coupling in the valence band of single-layer WS2

et al. 2017

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“…( 1). Recent theoretical work on elemental metals showed that there exists a remarkable k dependence of τ even in such simple metals when the electron-phonon interaction is considered [48,49]. Because we do not know the precise representation of τ n (k), we cannot discuss the effect of (ii) quantitatively.…”

Section: B Magnetotransport Properties In the Normal Metallic Phase I...mentioning

confidence: 96%

Magnetotransport studies of the Sb square-net compound LaAgSb2 under high pressure and rotating magnetic fields

2022

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Square-net-layered materials have attracted attention as an extended research platform of Dirac fermions and of exotic magnetotransport phenomena. In this study, we investigated the magnetotransport properties of LaAgSb 2 , which has Sb-square-net layers and shows charge density wave (CDW) transitions at ambient pressure. The application of pressure suppresses the CDWs, and above a pressure of 3.2 GPa a normal metallic phase with no CDWs is realized. By utilizing a mechanical rotator combined with a high-pressure cell, we observed the angular dependence of the Shubnikov-de Haas (SdH) oscillation up to 3.5 GPa, and we confirmed the notable two-dimensional nature of the Fermi surface. In the normal metallic phase, we also observed a remarkable field-angular-dependent magnetoresistance (MR), which exhibited a "butterflylike" polar pattern. To understand these results, we theoretically calculated the Fermi surface and conductivity tensor at the normal metallic phase. We showed that the SdH frequency and Hall coefficient calculated based on the present Fermi surface model agree well with the experiment. The transport properties in the normal metallic phase are mostly dominated by the anisotropic Dirac band, which has the highest conductivity due to linear energy dispersions. We also proposed that momentum-dependent relaxation time plays an important role in the large transverse MR and negative longitudinal MR in the normal metallic phase, which is experimentally supported by the considerable violation of Kohler's scaling rule. Although quantitatively complete reproduction was not achieved, the calculation showed that the elemental features of the butterfly MR could be reasonably explained as the geometrical effect of the Fermi surface.

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Phonon limited electronic transport in Pb

Cited by 16 publications

References 51 publications

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂

Spin-dependent electron-phonon coupling in the valence band of single-layer WS2

Magnetotransport studies of the Sb square-net compound LaAgSb2 under high pressure and rotating magnetic fields

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Phonon limited electronic transport in Pb

Cited by 16 publications

References 51 publications

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS 2

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS 2

Spin-dependent electron-phonon coupling in the valence band of single-layer WS2

Magnetotransport studies of the Sb square-net compound LaAgSb2 under high pressure and rotating magnetic fields

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Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂

Electron–phonon interaction and transport properties of metallic bulk and monolayer transition metal dichalcogenide TaS ₂