Paired states at 5/2: Particle-hole Pfaffian and particle-hole symmetry breaking
Paired states at 5/2: Particle-hole Pfaffian and particle-hole symmetry breaking
复制标题
5/2 处的配对态:粒子孔普法夫和粒子孔对称性破缺
DOI:
10.1103/physrevb.98.115107
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发表时间:
2018
影响因子:
3.7
通讯作者:
M. Milovanović
中科院分区:
文献类型:
--
作者:
L. Antonic;J. Vučičević;M. Milovanović
We study Cooper pairing in the Dirac composite fermion (CF) system. The presence of the mass term in the Dirac CF description (which may simulate Landau level mixing), i.e., breaking of particle-hole (PH) symmetry in this system, is a necessary condition for the existence of a PH Pfaffian-like topological state. In the scope of the random-phase approximation (RPA) and hydrodynamic approach, we find some signatures of pairing at finite frequencies. Motivated by this insight, we extend our analysis to the case of a different but still Dirac quasiparticle (CF) representation, appropriate in the presence of a mass term, and discuss the likelihood of PH Pfaffian and Pfaffian pairings in general. On the basis of gauge field effects, we find for a small Dirac mass, an anti-Pfaffian or Pfaffian instability depending on the sign of mass, while for large mass (Landau level mixing), irrespective of its sign, we find a PH Pfaffian-like instability.
影响因子:
3.7
作者:
Ajit C. Balram;M. Barkeshli;M. Rudner
通讯作者:
Ajit C. Balram;M. Barkeshli;M. Rudner
影响因子:
3.7
作者:
R. Mishmash;David F. Mross;J. Alicea;O. Motrunich
通讯作者:
R. Mishmash;David F. Mross;J. Alicea;O. Motrunich