Fermi Surface Deformation Near Charge-Ordering Transition
نویسندگان
چکیده
منابع مشابه
MnO 3 near the charge - ordering transition
We have studied low frequency resistance fluctuations (noise) in a single crystal of the rare earth perovskite manganite Pr0.63Ca0.37MnO3 which shows a charge ordering transition at a temperature TCO ≈ 245K. The measurements were made across the CO transition covering the temperature range 200K < T < 330K and frequency range 10Hz < f < 10Hz. The noise measurements were made using an ac bias wit...
متن کاملFermi surface nesting and nanoscale fluctuating charge/orbital ordering in colossal magnetoresistive oxides.
We used high-resolution angle-resolved photoemission spectroscopy to reveal the Fermi surface and key transport parameters of the metallic state of the layered colossal magnetoresistive oxide La1.2Sr1.8Mn2O7. With these parameters, the calculated in-plane conductivity is nearly one order of magnitude larger than the measured direct current conductivity. This discrepancy can be accounted for by ...
متن کاملBreakup of the Fermi surface near the mott transition in low-dimensional systems.
We investigate the Mott transition in weakly coupled one-dimensional (1D) fermionic chains. Using a generalization of dynamical mean field theory, we show that the Mott gap is suppressed at some critical hopping t{ perpendicular}{c2}. The transition from the 1D insulator to a 2D metal proceeds through an intermediate phase where the Fermi surface is broken into electron and hole pockets. The qu...
متن کاملLong range charge ordering in magnetite below the Verwey transition.
The crystal structure of Fe(3)O(4) below the 122 K Verwey transition has been refined using high-resolution x-ray and neutron powder diffraction data. The refinements give direct evidence for charge ordering (CO) over four independent octahedral Fe sites, two with a charge of +2.4 and the other two of +2.6. CO schemes consistent with our model do not meet the widely accepted Anderson condition ...
متن کاملExtended Hubbard model: Charge ordering and Wigner-Mott transition
Strong correlations effects, which are often associated to the approach to a Mott insulating state, in some cases may be observed even far from half filling. This typically happens whenever the intersite Coulomb repulsion induces a tendency toward charge ordering, an effect that confines the electrons, and in turn favors local moment formation, i.e., Mott localization. A distinct intermediate r...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 2011
ISSN: 0031-9015,1347-4073
DOI: 10.1143/jpsj.80.123707