Effect of Thermal Fluctuations of Spin Density Wave Order Parameter on the Quasiparticle Spectral Function

Journal Article · Fri Apr 02 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.81.155102· OSTI ID:984802

Khodas, M; Tsvelik, A M

The two-dimensional model of itinerant electrons coupled to an antiferromagnetic order parameter is considered. In the mean-field solution the Fermi surface undergoes reconstruction and breaks into disconnected 'pockets'. We have studied the effect of the thermal fluctuations of the order parameter on the spectral density in such system. These fluctuations lead to a finite width of the spectral line scaling linearly with temperature. Due to the thermal fluctuations the quasiparticle spectral weight is transferred into a magnetic Brillouin zone. This can be interpreted as restoration of 'arcs' of the noninteracting Fermi surface.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 984802
• Report Number(s): BNL-93746-2010-JA; R&D Project: PO-015; KC0202030; TRN: US1006032
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 81, Issue 15; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BRILLOUIN ZONES
ELECTRONS
FERMI LEVEL
FLUCTUATIONS
ORDER PARAMETERS
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
SPIN