Band crossover and magnetic phase diagram of the high-T-c superconducting compound Ba2CuO4-delta

doi:10.1103/PhysRevB.105.184506

	Band crossover and magnetic phase diagram of the high-T-c superconducting compound Ba2CuO4-delta
	Bai, Xiao-Cheng 2,3; Quan, Ya-Min 2; Lin, H. -Q.1,4; Zou, Liang-Jian 2,3
刊名	PHYSICAL REVIEW B
	2022-05-06
卷号	105
ISSN号	2469-9950
DOI	10.1103/PhysRevB.105.184506
通讯作者	Zou, Liang-Jian(zou@theory.issp.ac.cn)
英文摘要	We present the influences of electronic and magnetic correlations and doping on the ground-state properties of the recently discovered superconductor Ba2CuO4-delta by utilizing the rotationally invariant slave-boson method. Starting with an effective two-orbital Hubbard model [Scalapino et al., Phys. Rev. B 99, 224515 (2019)], we demonstrate that with increasing doping concentration, the paramagnetic (PM) system evolves from a two-band character to single band around the electron filling n = 2.5, with the band nature of the d(3z2-r2) and d(x2-y2) orbitals to the d(3z2-r2) orbital, slightly affected when the electronic correlation U varies from 2 to 4 eV. Considering the magnetic correlations, the system displays one antiferromagnetic (AFM) metallic phase in 2 < n < 2.14 and a PM phase in n > 2.14 at U = 2 eV, or two AFM metallic phases in 2 < n < 2.52 and 2.74 < n < 3, and a PM phase in 2.52 < n < 2.74, respectively, at U = 4 eV. Our results show that near the realistic superconducting state around n = 2.6 the intermediate correlated Ba2CuO3,2 should be of single-band character. The s-wave superconducting pairing strength becomes significant when U > 2 eV, and crosses over to d wave when U > 2.2 eV.
资助项目	National Natural Science Foundation of China[11774350] ; National Natural Science Foundation of China[11534010] ; NSAF[U1930402]
WOS关键词	SLAVE-BOSON APPROACH ; MEAN-FIELD THEORY ; HUBBARD-MODEL ; SYSTEMS ; SPIN
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000804768100003
资助机构	National Natural Science Foundation of China ; NSAF
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130983]
专题	中国科学院合肥物质科学研究院
通讯作者	Zou, Liang-Jian
作者单位	1.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, HFIPS, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China 4.Beijing Computat Sci Res Ctr, Beijing 100193, Peoples R China
推荐引用方式 GB/T 7714	Bai, Xiao-Cheng,Quan, Ya-Min,Lin, H. -Q.,et al. Band crossover and magnetic phase diagram of the high-T-c superconducting compound Ba2CuO4-delta[J]. PHYSICAL REVIEW B,2022,105.
APA	Bai, Xiao-Cheng,Quan, Ya-Min,Lin, H. -Q.,&Zou, Liang-Jian.(2022).Band crossover and magnetic phase diagram of the high-T-c superconducting compound Ba2CuO4-delta.PHYSICAL REVIEW B,105.
MLA	Bai, Xiao-Cheng,et al."Band crossover and magnetic phase diagram of the high-T-c superconducting compound Ba2CuO4-delta".PHYSICAL REVIEW B 105(2022).