@article{2aaefa7fc7484addbcd632cc515c61d8,
title = "Mott transition controlled by lattice-orbital coupling in 3d -metal-doped double-layer ruthenates",
abstract = "We have investigated unusual phase transitions that were triggered by chemical doping in Ca3Ru2O7. Our experiments showed that doping with a few percent of Mn (>4%) can change the quasi-two-dimensional metallic state of Ca3Ru2O7 into a Mott insulating state with a G-type antiferromagnetic order, but this Mott state cannot be induced by Fe doping. By combining these results with first-principles calculations, we show that lattice-orbital coupling (LOC) plays an important role in the Mott transition. Interestingly, the transition temperature TMIT is found to be predetermined by a structural parameter denoted by c/ab at temperatures far above N{\'e}el temperature TN. This LOC-assisted Mott transition clearly contrasts with the band-filling picture. It is addressed that this type of Mott transition originates in the strong scattering centers formed by specific 3d dopants. The dopant-scattering picture is then applied to explain the puzzling doping effects that occur in other ruthenates and 3d oxides. Our findings will advance the general understanding of how the unusual properties of 4d correlated systems are governed by the complex interplay that occurs among the charge, spin, lattice, and orbital degrees of freedom.",
author = "J. Peng and Gu, {M. Q.} and Gu, {X. M.} and Zhou, {G. T.} and Gao, {X. Y.} and Liu, {J. Y.} and Xu, {W. F.} and Liu, {G. Q.} and X. Ke and L. Zhang and H. Han and Z. Qu and Fu, {D. W.} and Cai, {H. L.} and Zhang, {F. M.} and Mao, {Z. Q.} and Wu, {X. S.}",
note = "Funding Information: The work performed at Nanjing University was supported by the National Natural Science Foundation of China (NNSFC) (Grants No. 11304149, No. U1332205, No. 11274153, No. 11204124, and No. 51202108). The work performed at Tulane University was supported by the US Department of Energy under Experimental Program to Stimulate Competitive Research (EPSCoR) Grant No. DE-SC0012432, with additional support being provided by the Louisiana Board of Regents (support for crystal growth, magnetization, and transport measurements). X.K. acknowledges the start-up fund provided by Michigan State University. The work performed at the High Magnetic Field Laboratory of the Chinese Academy of Sciences was supported by the NNSFC (Grants No. 11574322 and No. U1532153). G.Q.L. was also supported by the NNSFC (Grants No. 11204326 and No. 11474296). The authors thank personnel at beamline BL14W1 at the Shanghai Synchrotron Radiation Facility for providing the beam time. A portion of this work was performed on the steady high magnetic field facilities, High magnetic field laboratory, CAS. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = nov,
day = "2",
doi = "10.1103/PhysRevB.96.205105",
language = "English (US)",
volume = "96",
journal = "Physical Review B-Condensed Matter",
issn = "2469-9950",
publisher = "American Physical Society",
number = "20",
}