Volume 88, Number 6, December 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||04 January 2010|
Fermi-surface pockets in magnetic underdoped cuprates from first principles
CNR-INFM SLACS, and Dipartimento di Fisica of Università di Cagliari - I-09042 Monserrato (CA), Italy, EU
Corresponding author: email@example.com
Accepted: 24 November 2009
Using an innovative first-principles band theory enabling the exploration of Mott-insulating magnetic cuprates, we study the Fermi surface of underdoped YCaxBa2Cu3O6 in a selection of magnetically ordered and polaronic states. Inclusion of doping on the antiferromagnetically ordered CuO2 planes causes the appearance of small, hole-like Fermi-surface pockets centered around the nodal points. The pocket properties (area, mass) depend on the underlying magnetic ordering (e.g. change with polaron formation), although the hole-like character is rather persistent for all the examined magnetic states.
PACS: 71.18.+y – Fermi surface: calculations and measurements; effective mass, g factor / 74.25.Jb – Electronic structure / 74.25.Ha – Magnetic properties
© EPLA, 2009
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