Abstract
We study the interplay of topological excitations in stripe phases: charge dislocations, charge loops, and spin vortices. In two dimensions these defects interact logarithmically on large distances. Using a renormalization-group analysis in the Coulomb-gas representation of these defects, we calculate the phase diagram and the critical properties of the transitions. Depending on the interaction parameters, spin and charge order can disappear at a single transition or in a sequence of two transitions (spin-charge separation). These transitions are nonuniversal with continuously varying critical exponents. We also determine the nature of the points where three phases coexist.
Original language | English |
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Pages (from-to) | 095701 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 89 |
Issue number | 9 |
DOIs | |
Publication status | Published - 26 Aug 2002 |
Keywords
- CUPRATE SUPERCONDUCTORS
- 2 DIMENSIONS
- FLUCTUATIONS
- LA2-XSRXNIO4
- MAGNETISM
- MODEL