Van Hove singularities as a result of quantum confinement: The origin of intriguing physical properties in Pb thin films

Sun, Yu Jie; Souma, S.; Li, Wen Juan; Sato, Takafumi; Zhu, Xie Gang; Guang, Wang; Chen, Xi; Cun, Xu; Xue, Qi Kun; Jia, Jin; Takahashi, Takashi; Sakurai, Takeshi

doi:10.1007/s12274-010-0047-z

Cited by 6 publications

(1 citation statement)

References 29 publications

(71 reference statements)

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“…These resonance peaks are often referred to in literature as quantum well states (QWS) because of the behavior that is reminiscent of the quantum well problem. For Pb(111), these quantum effects are easily realized because the interlayer spacing is a close multiple of the Fermi wavelength, d ≈ 0.66λ F [25], and it is well known that Pb films with this orientation support the existence of QWS well beyond the thicknesses found for other materials [27,29,30].…”

Section: Morphology Of 30 Nm Films and Their Normal State Propertiesmentioning

confidence: 99%

Low-temperature scanning tunneling microscopy and spectroscopy measurements of ultrathin Pb films

Moore¹,

Fedor²,

Iavarone³

2015

Supercond. Sci. Technol.

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We have investigated the electronic properties of ultrathin Pb films by low temperature scanning tunneling microscopy and spectroscopy. Our results show that 30 nm thick Pb(111) films grown on atomically flat highly oriented pyrolytic graphite (HOPG) and on amorphous SiO2 are both in the strong-coupling limit with transition temperature and energy gap close to the bulk value. Conductance maps and spectroscopy in the vortex state reveal a bound state at the center of the vortices, which suggest that the films are in the clean limit. Measurements of 3 nm Pb films grown on HOPG show a clear crossover to the weak-coupling regime and dirty limit.

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Section: Morphology Of 30 Nm Films and Their Normal State Propertiesmentioning

confidence: 99%

Low-temperature scanning tunneling microscopy and spectroscopy measurements of ultrathin Pb films

Moore¹,

Fedor²,

Iavarone³

2015

Supercond. Sci. Technol.

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PAn‐Graphene‐Nanoribbon Composite Materials for Organic Photovoltaics: A DFT Study of Their Electronic and Charge Transport Properties

Mazher

Desta

Khan

2013

Solar Cell Nanotechnology

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Quasi‐Homoepitaxial Growth of Highly Strained Alkali‐Metal Ultrathin Films on Kagome Superconductors

Kato,

Nakayama,

et al. 2024

Advanced Science

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Applying lattice strain to thin films, a critical factor to tailor their properties such as stabilizing a structural phase unstable at ambient pressure, generally necessitates heteroepitaxial growth to control the lattice mismatch with substrate. Therefore, while homoepitaxy, the growth of thin film on a substrate made of the same material, is a useful method to fabricate high‐quality thin films, its application to studying strain‐induced structural phases is limited. Contrary to this general belief, here the quasi‐homoepitaxial growth of Cs and Rb thin films is reported with substantial in‐plane compressive strain. This is achieved by utilizing the alkali‐metal layer existing in bulk crystal of kagome metals AV3Sb5 (A = Cs and Rb) as a structural template. The angle‐resolved photoemission spectroscopy measurements reveal the formation of metallic quantum well states and notable thickness‐dependent quasiparticle lifetime. Comparison with density functional theory calculations suggests that the obtained thin films crystalize in the face‐centered cubic structure, which is typically stable only under high pressure in bulk crystals. These findings provide a useful approach for synthesizing highly strained thin films by quasi‐homoepitaxy, and pave the way for investigating many‐body interactions in Fermi liquids with tunable dimensionality.

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Van Hove singularities as a result of quantum confinement: The origin of intriguing physical properties in Pb thin films

Cited by 6 publications

References 29 publications

Low-temperature scanning tunneling microscopy and spectroscopy measurements of ultrathin Pb films

Low-temperature scanning tunneling microscopy and spectroscopy measurements of ultrathin Pb films

PAn‐Graphene‐Nanoribbon Composite Materials for Organic Photovoltaics: A DFT Study of Their Electronic and Charge Transport Properties

Quasi‐Homoepitaxial Growth of Highly Strained Alkali‐Metal Ultrathin Films on Kagome Superconductors

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