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Extremely large anisotropic transport caused by electronic phase separation in Ti-doped Ca3Ru2O7

Journal Article · · Journal of Physics. D, Applied Physics
 [1];  [2];  [3];  [3];  [3];  [2];  [3];  [3]
  1. Nanjing University (China); Tulane University, New Orleans, LA (United States); Louisiana State University
  2. Tulane University, New Orleans, LA (United States)
  3. Nanjing University (China)
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In this paper, we reported an extremely large out-of-plane/in-plane anisotropic transport ($${{\rho}_{c}}/{{\rho}_{ab}}$$ ~ 109) in double layer ruthenates. The mechanism that may be responsible for this phenomenon is also explored here. Distinct from previously well studied layered materials which show large out-of-plane/in-plane electronic anisotropy (103–106), the Ti-doped Ca3Ru2O7 single crystals not only form quasi-2D layered structure, but also show phase separation within the layers. We found that Ti doping in Ca3Ru2O7 induced electronic phase separation between the insulating phase and weak localized phase. The ratio of these two phases is very sensitive to the Ti concentration. At typical concentration, the weak localized phase may form a channel on the background of the insulating phase within the ab plane. However, the small volume of weak localized phase makes it less likely to overlap in different layers. This results in a much larger electronic anisotropy ratio than pristine compound Ca3Ru2O7. Furthermore, this new mechanism provides a route for further increase electronic anisotropy, which will remarkably reduce current leak and power consumption in electronic devices.
Research Organization:
Louisiana State University, Baton Rouge, LA (United States)
Sponsoring Organization:
NSF; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012432
OSTI ID:
1673757
Alternate ID(s):
OSTI ID: 22867447
Journal Information:
Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 24 Vol. 49; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (25)

Anisotropic Properties of Conducting Polymers Prepared by Liquid Crystal Templating journal April 2004
Microscopic Understanding of the Anisotropic Conductivity of PEDOT:PSS Thin Films journal May 2007
Possible highT c superconductivity in the Ba?La?Cu?O system journal June 1986
Experimental Studies on the Anisotropic Thermoelectric Properties of Conducting Polymer Films journal August 2014
Magnetic phase separation in double layer ruthenates Ca3(Ru1−xTix)2O7 journal January 2016
Large in-plane/out-of-plane anisotropic conduction in PEDOT-based hybrid films: lamellar assemblies structured by mono-layered nanosheets journal January 2015
Imaging and manipulation of the competing electronic phases near the Mott metal-insulator transition journal March 2010
Solid state magnetic field sensors and applications journal August 1993
CMR manganites: physics, thin films and devices journal April 2003
Colossal magnetoresistance journal September 1997
Ordered stack of spin valves in a layered magnetoresistive perovskite journal December 1998
Raman-scattering study of the charge and spin dynamics of the layered ruthenium oxide Ca 3 Ru 2 O 7 journal September 1999
Evolution of the resistivity anisotropy in Bi 2 Sr 2 − x La x CuO 6 + δ single crystals for a wide range of hole doping journal March 2003
Quasi-two-dimensional metallic ground state of Ca 3 Ru 2 O 7 journal June 2004
Crystal and magnetic structure of Ca 3 Ru 2 O 7 journal August 2005
Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates ( Sr 1 − x Ca x ) 3 Ru 2 O 7 journal November 2008
Emergent electronic and magnetic state in Ca 3 Ru 2 O 7 induced by Ti doping journal November 2011
From quasi-two-dimensional metal with ferromagnetic bilayers to Mott insulator with G-type antiferromagnetic order in Ca 3 (Ru 1 − x Ti x ) 2 O 7 journal February 2013
Spin Valve Effect and Magnetoresistivity in Single Crystalline Ca 3 Ru 2 O 7 journal June 2008
Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca 3 Ru 2 O 7 journal March 1997
Nested Fermi Surface and Electronic Instability in Ca 3 Ru 2 O 7 journal March 2006
Pseudogap Dependence of the Optical Conductivity Spectra of Ca 3 Ru 2 O 7 : A Possible Contribution of the Orbital Flip Excitation journal March 2007
New compounds of the K 2 NIF 4 type journal August 1957
The compound Sr 3 Ti 2 O 7 and its structure journal January 1958
Complexity in Strongly Correlated Electronic Systems journal July 2005

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Ruthenates
electronic anisotropy
phase separation