Superconductivity in electron-doped layered TiNCl with variable interlayer coupling

Physical Reviews B Volume 86 Issue 2 Page 024516- published_at 2012
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Title ( eng )
Superconductivity in electron-doped layered TiNCl with variable interlayer coupling
Creator
Zhang Shuai
Tanaka Masashi
Source Title
Physical Reviews B
Volume 86
Issue 2
Start Page 024516
Abstract
Titanium nitride chloride (TiNCl), a band semiconductor with the a-form layered structure, becomes a superconductor with a transition temperature T-c approximate to 18.0 K by electron doping via alkali-metal intercalation. Upon cointercalation of various kinds of organic solvent molecules with alkali atoms, the superconducting layered crystals are swelled to different extents adjusting to the size of the molecules, and the T-c decreases linearly down to 6.5 K as a function of 1/d, where d is the interlayer separation (basal spacing) of the expanded nitride layers, implying the importance of the Coulomb interlayer coupling for superconductivity. This is in strong contrast to a previous finding that the T-c of the electron-doped ZrNCl and HfNCl with the beta-form layered structure rather increases with the increase of d upon a similar cointercalation of solvent molecules.
NDC
Chemistry [ 430 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2012
Rights
(c) 2012 American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.86.024516
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.86.024516