Fermi surfaces of the two-dimensional surface states on vicinal Cu(111)

2001 ◽  
Vol 64 (19) ◽  
Author(s):  
F. Baumberger ◽  
T. Greber ◽  
J. Osterwalder
Keyword(s):  
Surface States ◽  
Two Dimensional ◽  
Fermi Surfaces ◽  
Dimensional Surface

scholarly journals Electronic structure of reconstructed Au(100): Two-dimensional and one-dimensional surface states

2012 ◽  
Vol 86 (4) ◽  
Author(s):  
S. Bengió ◽  
V. Navarro ◽  
M. A. González-Barrio ◽  
R. Cortés ◽  
I. Vobornik ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Surface States ◽  
Two Dimensional ◽  
One Dimensional ◽  
Dimensional Surface

scholarly journals One-dimensional versus two-dimensional surface states on steppedAu(111)

2002 ◽  
Vol 65 (16) ◽  
Author(s):  
J. E. Ortega ◽  
A. Mugarza ◽  
V. Repain ◽  
S. Rousset ◽  
V. Pérez-Dieste ◽  
...  
Keyword(s):  
Surface States ◽  
Two Dimensional ◽  
One Dimensional ◽  
Dimensional Surface

scholarly journals DISCRETE AND CONTINUUM APPROACHES TO THREE-DIMENSIONAL QUANTUM GRAVITY

1991 ◽  
Vol 06 (39) ◽  
pp. 3591-3600 ◽  
Author(s):  
HIROSI OOGURI ◽  
NAOKI SASAKURA
Keyword(s):  
Gauge Theory ◽  
Moduli Space ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Analogue Model ◽  
Gauge Invariant ◽  
Invariant Functions ◽  
Dimensional Lattice ◽  
Chern Simons ◽  
Dimensional Surface

It is shown that, in the three-dimensional lattice gravity defined by Ponzano and Regge, the space of physical states is isomorphic to the space of gauge-invariant functions on the moduli space of flat SU(2) connections over a two-dimensional surface, which gives physical states in the ISO(3) Chern–Simons gauge theory. To prove this, we employ the q-analogue of this model defined by Turaev and Viro as a regularization to sum over states. A recent work by Turaev suggests that the q-analogue model itself may be related to an Euclidean gravity with a cosmological constant proportional to 1/k2, where q=e2πi/(k+2).

scholarly journals Two-Dimensional Fermi Surfaces in LaRuPO and LaFePO versus Three-Dimensional Fermi Surfaces in LaFe2P2

2009 ◽  
Vol 78 (5) ◽  
pp. 053705 ◽  
Author(s):  
Hiroshi Muranaka ◽  
Yusuke Doi ◽  
Keisuke Katayama ◽  
Hitoshi Sugawara ◽  
Rikio Settai ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Fermi Surfaces

Asymptotic analysis of some two-dimensional diffusion problems

1995 ◽  
Vol 448 (1933) ◽  
pp. 213-236 ◽  
Keyword(s):  
Linear Problem ◽  
Vacancy Concentration ◽  
Surface Concentration ◽  
Two Dimensional ◽  
Surface Source ◽  
Dimensional Diffusion ◽  
Equilibrium Vacancy ◽  
Equilibrium Vacancy Concentration ◽  
Dimensional Surface ◽  
Diffusion Problems

In this paper we discuss two-dimensional surface source and implant problems for a substitutional-interstitial diffusion model. We present asymptotic solutions in the limit of the surface concentration of impurity (or peak concentration of the implant) being far greater than the equilibrium vacancy concentration. Using leading order composite solutions we plot contours of constant impurity concentration. Some of these contours differ markedly from those of the corresponding linear problem, having the ‘bird’s beak’ shape which is frequently observed in experiments. We also discuss a two-dimensional surface source problem for a va­cancy model.

CHARGE DENSITY WAVE TRANSITIONS IN TWO-DIMENSIONAL TRANSITION METAL BRONZES AND OXIDES

1993 ◽  
Vol 07 (23n24) ◽  
pp. 3973-4003 ◽  
Author(s):  
P. FOURY ◽  
J.P. POUGET
Keyword(s):  
Transition Metal ◽  
Charge Density ◽  
Ground State ◽  
Charge Density Wave ◽  
Density Wave ◽  
Electron Localization ◽  
Two Dimensional ◽  
Fermi Surfaces ◽  
A Charge ◽  
Structural Instabilities

The structural instabilities towards the formation of a charge density wave (CDW) ground state exhibited by several layered Mo and W bronzes and oxides are reviewed. It is shown that in these two-dimensional (2D) metals, including the purple bronzes A x Mo 6 O 17 (A=K, Na, Tl; x≈1), the γ and η phases of MO 4 O 11 and the monophosphate tungsten bronzes with pentagonal tunnels ( PO 2)4 ( WO 3)2m(m=4, 6, 7), the CDW instability can be associated with particular chains of MoO 6 or WO 6 octahedra of the ReO 3 type slabs along which there is a strong overlap of the t 2g orbitals. The CDW critical wave vectors of the purple bronzes, Mo 4 O 11 and the tungsten bronzes with m=4 and 6 lead to a common nesting between differently oriented 1D Fermi surfaces. It is suggested that the anharmonic CDW modulation, which occurs in the tungsten bronzes with m≥7, could be the structural fingerprint of electron localization effects.

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