Quantum-disordered slave-boson theory of underdoped cuprates

Дата и время публикации : 1999-01-02T19:35:33Z

Авторы публикации и институты :
Yong Baek Kim
Ziqiang Wang

Ссылка на журнал-издание: Europhys. Lett. 50, 656 (2000)
Коментарии к cтатье: 5 pages, Replaced by the published version
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.supr-con

Краткий обзор статьи: We study the stability of the spin gap phase in the U(1) slave-boson theory of the t-J model in connection to the underdoped cuprates. We approach the spin gap phase from the superconducting state and consider the quantum phase transition of the slave-bosons at zero temperature by introducing vortices in the boson superfluid. At finite temperatures, the properties of the bosons are different from those of the strange metal phase and lead to modified gauge field fluctuations. As a result, the spin gap phase can be stabilized in the quantum critical and quantum disordered regime of the boson system. We also show that the regime of quantum disordered bosons with the paired fermions can be regarded as the strong coupling version of the recently proposed nodal liquid theory.

Category: Physics