Surface states, local bonding, and surface reconstruction: Na on Cu(110)

Sandl, P.; Bertel, E.

doi:10.1016/0039-6028(94)90829-x

Cited by 43 publications

(25 citation statements)

References 29 publications

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“…1, is the fitting to the model described above using four parameters: dE a dh , dE b dh , dC dh , and I 0 (x, T). Only the points up to the coverage of h Na = 0.8 were fit since photoemission studies show at that coverage, the lower surface state passes into the projected bulk bands and therefore a significant intensity contribution from bulk transitions is expected beyond h Na = 0.8 [15]. The dotted line in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2 of Ref. [11,15]. In addition, the fitting extracts a homogeneous linewidth broadening with coverage of 0.328 eV/ML.…”

Section: Resultsmentioning

confidence: 99%

“…For simplicity, the model assumes a linear energy shift with increasing Na coverage. This is an approximation of the true behavior and should be suitable for the first Na monolayer [11,15]. The effective masses of the occupied and unoccupied states before Na adsorption are 0.26 and 1.0 respectively [13,14].…”

Section: Theoretical Model For Na Coverage Dependent Shg From Cumentioning

confidence: 98%

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The effect of adsorption of Na on Cu(110) surface states probed by second harmonic generation

Dounce

Dai

2005

Surface Science

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Section: Resultsmentioning

confidence: 99%

“…2 of Ref. [11,15]. In addition, the fitting extracts a homogeneous linewidth broadening with coverage of 0.328 eV/ML.…”

Section: Resultsmentioning

confidence: 99%

Section: Theoretical Model For Na Coverage Dependent Shg From Cumentioning

confidence: 98%

See 1 more Smart Citation

The effect of adsorption of Na on Cu(110) surface states probed by second harmonic generation

Dounce

Dai

2005

Surface Science

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“…A strong topological index is expected when a full gap is opened by SOC [18]. Band inversions justify the persistence of surface states in noble metals even in the presence of absorbents such as alkali metals [19][20][21][22]. However, these states are generally not robust against backscattering, since there is no symmetry which protects the energy separation between surface and bulk states.…”

Section: Introductionmentioning

confidence: 99%

Surface Floating 2D Bands in Layered Nonsymmorphic Semimetals: ZrSiS and Related Compounds

et al. 2017

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In this work, we present a model of the surface states of nonsymmorphic semimetals. These are derived from surface mass terms that lift the high degeneracy imposed on the band structure by the nonsymmorphic bulk symmetries. Reflecting the reduced symmetry at the surface, the bulk bands are strongly modified. This leads to the creation of two-dimensional floating or unpinned bands, which are distinct from Shockley states, quantum well states, or topologically protected surface states. We focus on the layered semimetal ZrSiS to clarify the origin of its surface states. We demonstrate an excellent agreement between density functional theory calculations and angle-resolved photoemission spectroscopy measurements and present an effective four-band model in which similar surface bands appear. Finally, we emphasize the role of the surface chemical potential by comparing the surface density of states in samples with and without potassium coating. Our findings can be extended to related compounds and generalized to other crystals with nonsymmorphic symmetries.

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“…However, the rather diffuse, extended character of the unoccupied sp surface states tends to keep the interaction strength with adsorbate orbitals on a moderate level. Therefore, albeit being modified, they seem to survive adsorption in several cases, as shown here for H and ethylene (for alkali metals see, e.g., [18,19], for oxygen [201).…”

mentioning

confidence: 96%