Scanning tunneling spectroscopy study of the edge surface states on oxygen-etched graphite surface with the presence of liquid crystal steps

Klusek, Z.

doi:10.1016/s0042-207x(01)00182-8

Cited by 10 publications

(14 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…III B. Near the zigzag edge, we observed that the LDOS is suppressed selectively at |V | ≥ 0.6 V. Kulsek et al 9,10,35 observed the similar LDOS suppression near the circular edges at |V | ≥ 0.6−0.8 V, and claimed that it is associated with the π band splitting due to multilayer interaction at the P point in the two-dimensional Brillouin zone. 36,37 However, it is not clear why such suppression becomes prominent with dicreasing d with this explanation.…”

Section: B Graphite Edge Statesupporting

confidence: 69%

“…In the previous STS measurements performed near circular edges of graphite nanopits, 9,10 a broad maximum was observed in the LDOS near E F , which was attributed to the edge state. However, it is rather difficult, in this case, to distinguish between the electronic properties of the zigzag and armchair edges because both types of the edges inevitably coexist nearby on almost equal footing in the circular edge.…”

Section: Introductionmentioning

confidence: 83%

See 1 more Smart Citation

Scanning tunneling microscopy and spectroscopy of the electronic local density of states of graphite surfaces near monoatomic step edges

et al. 2006

View full text Add to dashboard Cite

We measured the electronic local density of states (LDOS) of graphite surfaces near monoatomic step edges, which consist of either the zigzag or armchair edge, with the scanning tunneling microscopy (STM) and spectroscopy (STS) techniques. The STM data reveal that the (and honeycomb superstructures coexist over a length scale of 3−4 nm from both the edges. By comparing with density-functional derived nonorthogonal tight-binding calculations, we show that the coexistence is due to a slight admixing of the two types of edges at the graphite surfaces. In the STS measurements, a clear peak in the LDOS at negative bias voltages from −100 to −20 mV was observed near the zigzag edges, while such a peak was not observed near the armchair edges. We concluded that this peak corresponds to the graphite "edge state" theoretically predicted by Fujita et al. [J. Phys. Soc. Jpn. 65, 1920] with a tight-binding model for graphene ribbons. The existence of the edge state only at the zigzag type edge was also confirmed by our first-principles calculations with different edge terminations.

show abstract

Section: B Graphite Edge Statesupporting

confidence: 69%

Section: Introductionmentioning

confidence: 83%

Scanning tunneling microscopy and spectroscopy of the electronic local density of states of graphite surfaces near monoatomic step edges

et al. 2006

View full text Add to dashboard Cite

show abstract

“…This is due to presence of a shell of zero-energy states owing to imbalance in number of atoms belonging to two interpenetrating sublattices 42,43 . Such states become localized at the zigzag edge (which effect is confirmed for various graphene structures [44][45][46][47][48] ) and result in spin polarization of the flake edge 18,19,22,24,49 . However, also bow-tie GNFs, which can be considered to some extent as structures composed of two triangular flakes, constitute an interesting class of graphene quantum dots 21 .…”

Section: Introductionmentioning

confidence: 62%

Ground-state magnetic phase diagram of bow-tie graphene nanoflakes in external magnetic field

Szałowski

2013

Journal of Applied Physics

View full text Add to dashboard Cite

The magnetic phase diagram of a ground state is studied theoretically for graphene nanoflakes of bow-tie shape and various size in external in-plane magnetic field. The tight-binding Hamiltonian supplemented with Hubbard term is used to model the electronic structure of the systems in question. The existence of the antiferromagnetic phase with magnetic moments localized at the sides of the bow-tie is found for low field and a field-induced spin-flip transition to ferromagnetic state is predicted to occur in charge-undoped structures. For small nanoflake doped with a single charge carrier the low-field phase is ferrimagnetic and a metamagnetic transition to ferromagnetic ordering can be forced by the field. The critical field is found to decrease with increasing size of the nanoflake. The influence of diagonal and off-diagonal disorder on the mentioned magnetic properties is studied. The effect of off-diagonal disorder is found to be more important than this of diagonal disorder, leading to significantly widened distribution of critical fields for disordered population of nanoflakes.

show abstract

“…The details of the experimental processes used here have been given in previous papers. [30][31][32][33][34] …”

Section: Methodsmentioning

confidence: 99%

Nanoscale Studies of the Early Stages of Oxidation of a TiAl-Base Alloy

Datta

Klusek

et al. 2004

Oxidation of Metals

View full text Add to dashboard Cite

Scanning tunneling spectroscopy study of the edge surface states on oxygen-etched graphite surface with the presence of liquid crystal steps

Cited by 10 publications

References 22 publications

Scanning tunneling microscopy and spectroscopy of the electronic local density of states of graphite surfaces near monoatomic step edges

Scanning tunneling microscopy and spectroscopy of the electronic local density of states of graphite surfaces near monoatomic step edges

Ground-state magnetic phase diagram of bow-tie graphene nanoflakes in external magnetic field

Nanoscale Studies of the Early Stages of Oxidation of a TiAl-Base Alloy

Contact Info

Product

Resources

About