Charge degrees in the quarter-filled checkerboard lattice
نویسندگان
چکیده
منابع مشابه
Charge ordering and magnetism in quarter-filled Hubbard-Holstein model
Sanjeev Kumar1,2 and Jeroen van den Brink1,3 1Institute Lorentz for Theoretical Physics, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands 2Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 3Institute for Molecules and Materials, Radboud Universiteit Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands Received 23 May ...
متن کاملسیستمهای الکترونی همبسته قوی در شبکههای ناکام
We give an overview of recent work on charge degrees of freedom of strongly correlated electrons on geometrically frustrated lattices. Special attention is paid to the checkerboard lattice, i.e., the two-dimensional version of a pyrochlore lattice and to the kagomé lattice. For the checkerboard lattice it is shown that at half filling when spin degrees of freedom are neglected and at quarter f...
متن کاملPhotoinduced melting and charge order in quarter-filled organic conductors: Itinerant electron systems with competing interactions
Photoinduced charge dynamics in oneand two-dimensional organic conductors are studied theoretically in extended Peierls-Hubbard models. For quasi-one-dimensional (EDO-TTF)2PF6, photoinduced change in the charge order pattern from (0110) to (1010) is accompanied by probe-energy-dependent oscillations of conductivity. This is caused by coexistence of charge order and delocalized electrons. For qu...
متن کاملCheckerboard-Like Charge Ordering in Underdoped Cuprates
Recent scanning tunneling microscopy measurements which indicate the formation of two-dimensional density modulations at some doping levels in cuprates were reviewed. A model of hard-core bosons which represent bound hole pairs in the two-dimensional doped antiferromagnet was discussed in the context of these experimental results. By means of an exact numerical diagonalization it was shown that...
متن کاملQuarter-filled Kitaev-Hubbard model: A quantum Hall state in an optical lattice
S. R. Hassan,1 Sandeep Goyal,1,2 R. Shankar,1 and David Sénéchal3 1The Institute of Mathematical Sciences, C.I.T. Campus, Chennai 600 113, India 2School of Chemistry and physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa 3Départment de Physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1 (Received 23 January 2012; revised manuscript re...
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 Magnetism and Magnetic Materials
سال: 2007
ISSN: 0304-8853
DOI: 10.1016/j.jmmm.2006.10.348