A neutron crystal-field study of the copper isotope effect on the pseudogap in the high-Tc cuprate HoBa2Cu4O8

Autor:	A. Sokolov, D. Rubio Temprano, Joël Mesot, Albert Furrer, K. Müller, K. Conder, Sergey M. Kazakov, J. Karpinski, S. Janssen, V. Trounov
Rok vydání:	2001
Předmět:	Superconductivity Isotopes of copper Chemistry Mechanical Engineering Metals and Alloys Analytical chemistry Inelastic scattering Inelastic neutron scattering Mechanics of Materials Kinetic isotope effect Materials Chemistry Cuprate Neutron Pseudogap Nuclear chemistry
Zdroj:	Journal of Alloys and Compounds. :554-557
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(01)01142-2
Popis:	The copper isotope effect on the relaxation rate of crystal-field transitions in the slightly underdoped high-temperature superconductor HoBa 2 Cu 4 O 8 has been investigated by means of inelastic neutron scattering. The measurements give clear evidence for the opening of a normal state pseudogap at T ∗ far above T c , but it is shifted from T ∗=160(10) K for the HoBa 2 63 Cu 4 O 8 compound to T ∗=185(5) K for the HoBa 2 65 Cu 4 O 8 compound, giving rise to an isotope effect of Δ T ∗=25(15) K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fc8548637ef4b337ed2451fa0b27b58f https://doi.org/10.1016/s0925-8388(01)01142-2 Zobrazit plný text záznamu Full Text from ScienceDirect