First-order melting of a weak spin-orbit Mott insulator into a correlated metal

Autor:	Hogan, Tom, Yamani, Z., Walkup, D., Chen, Xiang, Dally, Rebecca, Ward, Thomas Z., Hill, John, Islam, Z., Madhavan, Vidya, Wilson, Stephen D.
Rok vydání:	2015
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science Condensed Matter - Superconductivity
Zdroj:	Physical Review Letters 114, 257203 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.114.257203
Popis:	The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)Lax)3Ir2O7 is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regime of nanoscale phase separation comprised of antiferromagnetic, insulating regions and paramagnetic, metallic puddles persisting until x~0.04. Continued electron doping results in an abrupt, first-order phase boundary where the Neel state is suppressed and a homogenous, correlated, metallic state appears with an enhanced spin susceptibility and local moments. As the metallic state is stabilized, a weak structural distortion develops and suggests a competing instability with the parent spin-orbit Mott state. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1506.00041 Zobrazit plný text záznamu View this record from Arxiv