Tunneling Spectroscopy of bcc (001) Surface States

Stroscio, Joseph A.; Pierce, Daniel T.; Davies, Angela; Celotta, Robert; Weinert, M.

doi:10.1103/physrevlett.75.2960

Cited by 264 publications

(222 citation statements)

References 20 publications

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“…5.2a)). Measurements of the differential conductance dI/dV at energies close to the Fe surface state at −200 mV [63] reveal the white lines in the topography as boundaries between two electronically different domains: in a dI/dV map taken at −130 mV (see inset in Fig. 5.2b)), the Fe monolayer shows a reduced intensity inside the domain.…”

Section: Crystallographic Structure Of Fe/ni(111)mentioning

confidence: 97%

Magnetoelectric coupling at metal surfaces

et al. 2010

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Section: Crystallographic Structure Of Fe/ni(111)mentioning

confidence: 97%

Magnetoelectric coupling at metal surfaces

et al. 2010

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“…For the bcc(001) surface of Fe and Cr a surface state of s-d z 2 character has been found at theΓ point of the band structure (see e.g. [3,4]). A similar surface resonance was observed on a Fe(001) surface alloyed with Si [5].…”

Section: Introductionmentioning

confidence: 99%

Surface resonance on the NiFe(001) alloy surface

et al. 2006

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First principles calculations based on density-functional theory are used to investigate the geometrical and electronic structure of a NiFe(001) invar surface. We use different ordered as well as alloy fcc-like structures to simulate the system. Ab initio atomic force minimizations show that the (001) invar surface is rumpled; Fe atoms are shifted outwards, Ni atoms inwards. A surface resonance is observed at (0.1-1.0) eV below the Fermi level, depending on the chemical ordering at and below the surface. Our calculations show that this resonance is pronounced in iron-rich surface regions. : 73.20.-r PACS

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“…From an experimental point of view the situation is a bit confusing since some discrepancies between band structure calculations and angle resolved photoelectron spectroscopy [5] experiments were pointed that were partly attributed to an overestimation of the surface magnetization in DFT. Later on tunneling spectroscopy experiments [6] showed again that an agreement between experiment and theory cannot be obtained without a reduction of surface magnetization.…”

Section: Introductionmentioning

confidence: 99%

Electronic and magnetic structure of the Cr(001) surface

Habibi

Barreteau

2013

J. Phys.: Condens. Matter

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Density functional theory (DFT) calculations are carried out to study the electronic and magnetic structure of the (001) surface of chromium. Our aim is to identify and characterize the most prominent electronic surface states and make the connection with the main experimental results. We show that a low dispersive minority spin surface state at the center of the surface Brillouin zone plays a crucial role. This surface state of 1 symmetry at 0.58 eV above the Fermi level exhibits a predominantly d z 2 as well as p z orbital character. Local density of states (LDOS) analysis in the vacuum above the surface shows that the sharp feature originating from this surface state persists far away above the surface because of the slow decay rate of the p z wavefunction. Finally, by artificially lowering the surface magnetic moment m S on the outermost surface layer we find excellent agreement with experiments for m S = 1.75 µ B . In addition, we propose that some extra spin polarized scanning tunneling spectroscopy (SP-STS) experiments should be made at smaller tip-surface distances to reveal additional features originating from the majority spin d z 2 surface state.

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Tunneling Spectroscopy of bcc (001) Surface States

Cited by 264 publications

References 20 publications

Magnetoelectric coupling at metal surfaces

Magnetoelectric coupling at metal surfaces

Surface resonance on the NiFe(001) alloy surface

Electronic and magnetic structure of the Cr(001) surface

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