Spin coupling in zigzag Wigner crystals.
We consider interacting electrons in a quantum wire in the case of a shallow confining potential and low electron density. In a certain range of densities, the electrons form a two-row (zigzag) Wigner crystal whose spin properties are determined by nearest and next-nearest neighbor exchange as well as by three- and four-particle ring exchange processes. The phase diagram of the resulting zigzag spin chain has regions of complete spin polarization and partial spin polarization in addition to a number of unpolarized phases, including antiferromagnetism and dimer order as well as a novel phase generated by the four-particle ring exchange.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; Ministry of Education, Culture, Sports, Science and Technology of Japan
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 929243
- Report Number(s):
- ANL/MSD/JA-59214
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: Aug. 2007 Vol. 7; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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