期刊
PHYSICAL REVIEW B
卷 102, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.102.085159
关键词
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资金
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [646807-EXMAG]
- Czech Ministry of Education, Youth and Sports from the Large Infrastructures for Research, Experimental Development and Innovations project IT4Innovations National Supercomputing Center [LM2015070]
We present a dynamical mean-field study of two-particle dynamical response functions in a two-band Hubbard model across several phase transitions. We observe that the transition between the excitonic condensate and spin-state ordered state is continuous with a narrow strip of supersolid phase separating the two. Approaching transition from the excitonic condensate is announced by softening of the excitonic mode at the M point of the Brillouin zone. Inside the spin-state ordered phase there is a magnetically ordered state with 2 x 2 periodicity, which has no precursor in the normal phase.
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