Microscopic model versus systematic low-energy effective field theory for a doped quantum ferromagnet
Microscopic model versus systematic low-energy effective field theory for a doped quantum ferromagnet
We consider a microscopic model for a doped quantum ferromagnet as a test case for the systematic low-energy effective field theory for magnons and holes, which is constructed in complete analogy to the case of quantum antiferromagnets. In contrast to antiferromagnets, for which the effective field theory approach can be …