A nice PRL just appeared by Lara Cano-Cortes, Jaime Merino, and Simone Fratini, Quantum critical behaviour of electrons at the edge of charge order. They consider an extended Hubbard model at one-quarter filling. As the intersite Coulomb repulsion V increases there is a quantum phase transition from a metallic Fermi liquid phase to a charge ordered phase. The striking finding is that the coherence temperature, below which quasi-particles exist, approaches zero as the transition is approached.
I also found the paper interesting because this model is directly relevant to a class of organic charge transfer salts, as discussed in a PRB by myself, Jaime, Brad Marston, and Oleg Sushkov.
Subscribe to:
Post Comments (Atom)
From Leo Szilard to the Tasmanian wilderness
Richard Flanagan is an esteemed Australian writer. My son recently gave our family a copy of Flanagan's recent book, Question 7 . It is...
-
Is it something to do with breakdown of the Born-Oppenheimer approximation? In molecular spectroscopy you occasionally hear this term thro...
-
If you look on the arXiv and in Nature journals there is a continuing stream of people claiming to observe superconductivity in some new mat...
-
I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
No comments:
Post a Comment