4 papers
Theory of spin excitations in undoped and underdoped cuprates
Don H. Kim, Patrick A. Lee
We consider the magnetic properties of high Tc cuprates from a gauge theory point of view, with emphasis on the underdoped regime. Underdoped cuprates possess certain antiferromagn…
Massless Dirac Fermions, Gauge Fields, and Underdoped Cuprates
Don H. Kim, Patrick A. Lee, Xiao-Gang Wen
We study 2+1 dimensional massless Dirac fermions and bosons coupled to a U(1) gauge field as a model for underdoped cuprates. We find that the uniform susceptibility and the specif…
Bosons, gauge fields, and high-Tc cuprates
Don H. Kim, Derek K. K. Lee, Patrick A. Lee
A simple model of a degenerate two-dimensional Bose liquid interacting with a fluctuating gauge field is investigated as a possible candidate to describe the charge degree of freed…
Degenerate Bose liquid in a fluctuating gauge field
Derek K. K. Lee, Don H. Kim, Patrick A. Lee
We study the effect of a strongly fluctuating gauge field on a degenerate Bose liquid, relevant to the charge degrees of freedom in doped Mott insulators. We find that the superflu…