期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.176404
关键词
-
资金
- DFG [SFB 608]
- U. S. Department of Energy, Office of Science [DE-AC02-06CH11357, E-FG02-07ER46424]
We consider a quantum wire with two subbands of spin-polarized electrons in the presence of strong interactions. We focus on the quantum phase transition when the second subband starts to get filled as a function of gate voltage. Performing a one-loop renormalization group analysis of the effective Hamiltonian, we identify the critical fixed-point theory as a conformal field theory having an enhanced SU(2) symmetry and central charge 3/2. While the fixed point is Lorentz invariant, the effective speed of light nevertheless vanishes at low energies due to marginally irrelevant operators leading to a diverging critical specific heat coefficient.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据