Atomically resolved charge-density waves in 1T-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">TaS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Han, Wenhai; Pappas, R.A.; Hunt, E. Raymond; Frindt, R. F.

doi:10.1103/physrevb.48.8466

Cited by 18 publications

(6 citation statements)

References 27 publications

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“…This result represents solid evidence against the presence of a CDW on Bi͑111͒, since CDWs usually show up very clearly in constant current STM images. [20][21][22][23] It is also interesting to note that earlier low-temperature STM investigations of Bi͑111͒ did not report the observation of a CDW superstructure either, although the precise temperature in these experiments is not known. 24,25 It has been shown recently for Bi͑110͒ that the quasiparticle interference patterns observed in STM conductance images can be used to infer information about the spin of the electronic states.…”

Section: Scanning Tunneling Microscopymentioning

confidence: 93%

“…A twodimensional Fourier transformation of conductance images taken with small tunneling voltages is therefore closely related to the two-dimensional Fermi surface, 28 a relationship which has led to several applications. 21,[28][29][30][31][32][33][34][35] However, this simple picture is only correct when the state at k F and the state at −k F have the same spin. On Bi͑110͒ this is not the case because of spin-orbit splitting.…”

Section: Scanning Tunneling Microscopymentioning

confidence: 99%

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Evidence against a charge density wave on Bi(111)

et al. 2005

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The Bi͑111͒ surface was studied by scanning tunneling microscopy ͑STM͒, transmission electron microscopy ͑TEM͒, and angle-resolved photoemission spectroscopy ͑ARPES͒ in order to verify the existence of a recently proposed surface charge-density wave ͑CDW͒ ͓Ch. R. Ast and H. Höchst, Phys. Rev. Lett. 90, 016403 ͑2003͔͒. The STM and TEM results do not support a CDW scenario at low temperatures. Furthermore, the quasiparticle interference pattern observed in STM confirms the spin-orbit split character of the surface states which prevents the formation of a CDW, even in the case of good nesting. The dispersion of the electronic states observed with ARPES agrees well with earlier findings. In particular, the Fermi contour of the electron pocket at the center of the surface Brillouin zone is found to have a hexagonal shape. However, no gap opening or other signatures of a CDW phase transition can be found in the temperature-dependent data.

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Section: Scanning Tunneling Microscopymentioning

confidence: 93%

Section: Scanning Tunneling Microscopymentioning

confidence: 99%

Evidence against a charge density wave on Bi(111)

et al. 2005

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“…Since the topographic image represents the modulus squared of the wavefunction, we calculate the wavenumber, q surface , as 0.068 Å -1 . 47 Additional FT-STM images across both positive and negative biases will provide an analysis complimentary the ARPES measurements in mapping the electronic structure of GBT, and this is the subject of a future study.…”

Section: E Scanning Tunneling Microscopymentioning

confidence: 99%

Topological metal behavior in GeBi2Te4single crystals

et al. 2013

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The metallic character of the GeBi 2 Te 4 single crystals is probed using a combination of structural and physical properties measurements, together with density functional theory (DFT) calculations. The structural study shows distorted Ge coordination polyhedra, mainly of the Ge octahedra. This has a major impact on the band structure, resulting in bulk metallic behavior of GeBi 2 Te 4 , as indicated by DFT calculations. Such calculations place GeBi 2 Te 4 in a class of a few known nontrivial topological metals, and explains why an observed Dirac point lies below the Fermi energy at about −0.12 eV. A topological picture of GeBi 2 Te 4 is confirmed by the observation of surface state modulations by scanning tunneling microscopy.

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“…There are a few STM images of TaS 2 reported in air. For examples, Han et al [6] and Thomson et al [12] both have investigated the charge-density wave in nearly NC phase of TaS 2 in air. Compared with STM images obtained in UHV condition [13], images taken in air were presented withpoor quality.…”

Section: Introductionmentioning

confidence: 99%

Direct observation of transition metal dichalcogenides in liquid with scanning tunneling microscopy

Wang

et al. 2018

Chinese Journal of Chemical Physics

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We present atomic-resolution images of TiSe 2 , MoTe 2 and TaS 2 single crystals in liquid condition using our home-built scanning tunneling microscopy (STM). By facilely cleaving of single crystals in liquid, we were able to keep the fresh surface not oxidized within a few hours. Using the high-stable home-built STM, we have obtained atomic resolution images of TiSe 2 accompanied with the single atom defects as well as the triangle defects in solution for the first time. Besides, the superstructure of MoTe 2 and hexagonal chargedensity wave domain structure in nearly commensurate phase of TaS 2 were also obtained at room temperature (295 K). Our results provide a more efficient method in investigating the lively surface of transition metal dichalcogenides. Besides, the high stable liquid-phase STM will support the further investigations in liquid-phase catalysis or electrochemistry.

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Atomically resolved charge-density waves in 1T-TaS2

Cited by 18 publications

References 27 publications

Evidence against a charge density wave on Bi(111)

Evidence against a charge density wave on Bi(111)

Topological metal behavior in GeBi2Te4single crystals

Direct observation of transition metal dichalcogenides in liquid with scanning tunneling microscopy

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