Understanding correlated electron systems by a classification of Mott insulators
Abstrak
Abstract This paper surveys the physics of systems proximate to Mott insulators, and presents a classification using conventional and topological order parameters. This classification offers a valuable perspective on a variety of conducting correlated electron systems, from the cuprate superconductors to the heavy fermion compounds. Connections are drawn, and distinctions made, between collinear/non-collinear magnetic order, bond order, neutral spin 1/2 excitations in insulators, electron Fermi surfaces which violate Luttinger’s theorem, fractionalization of the electron, and the fractionalization of bosonic collective modes. Two distinct categories of Z 2 gauge theories are used to describe the interplay of these orders. Experimental implications for the cuprates are briefly noted, but these appear in more detail in a companion review paper (S. Sachdev, cond-mat/0211005).
Topik & Kata Kunci
Penulis (1)
S. Sachdev
Akses Cepat
- Tahun Terbit
- 2002
- Bahasa
- en
- Total Sitasi
- 31×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1016/S0003-4916(02)00024-6
- Akses
- Open Access ✓