Electronic confinement and ordering instabilities in colossal magnetoresistive bilayer manganites.
Electronic confinement and ordering instabilities in colossal magnetoresistive bilayer manganites.
复制标题
巨大磁阻双层锰氧化物中的电子限制和有序不稳定性
DOI:
10.1103/physrevlett.108.016403
复制
发表时间:
2012
影响因子:
8.6
通讯作者:
J. Geck
中科院分区:
文献类型:
--
作者:
J. Trinckauf;T. Hänke;V. Zabolotnyy;T. Ritschel;M. O. Apostu;R. Suryanarayanan;A. Revcolevschi;K. Koepernik;T. K. Kim;M. v. Zimmermann;S. V. Borisenko;M. Knupfer;B. Büchner;J. Geck
We present angle-resolved photoemission studies ofwithand, 0.2, and 0.4 along with density functional theory calculations and x-ray scattering data. Our results show that the bilayer splitting in the ferromagnetic metallic phase of these materials is small, if not completely absent. The charge carriers are therefore confined to a singlelayer, which in turn results in a strongly nested Fermi surface. In addition to this, the spectral function also displays clear signatures of an electronic ordering instability well below the Fermi level. The increase of the corresponding interaction strength withand its magnitude ofmake the coupling to a bare phonon highly unlikely. Instead we conclude that fluctuating order, involving electronic and lattice degrees of freedom, causes the observed renormalization of the spectral features.
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
V. Stankevich;S. Kimura;他8名;T. Ito;S. Kimura
通讯作者:
S. Kimura