682 research outputs found
Large magneto-thermal effect and the spin-phonon coupling in a parent insulating cuprate Pr_{1.3}La_{0.7}CuO_4
The magnetic-field (H) dependence of the thermal conductivity \kappa of
Pr_{1.3}La_{0.7}CuO_4 is found to show a pronounced minimum for in-plane fields
at low temperature, which is best attributed to the scattering of phonons by
free spins that are seen by a Schottky-type specific heat and a Curie-Weiss
susceptibility. Besides pointing to a strong spin-phonon coupling in cuprates,
the present result demonstrates that the H-dependence of the phonon heat
transport should not be naively neglected when discussing the \kappa(H)
behavior of cuprates, since the Schottky anomaly is ubiquitously found in
cuprates at any doping.Comment: 6 pages, 4 figures, accepted for publication in Phys. Rev.
ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠ΅ΡΡΡΡΠ° ΡΠ°Π±ΠΎΡΡ Π·ΠΎΠ½Π΄ΠΎΠ² Π΄Π»Ρ ΡΠ»Π΅ΠΊΡΡΠΎΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΉ Π»ΠΈΡΠΎΡΡΠΈΠΏΡΠΈΠΈ
Π Π΄Π°Π½Π½ΠΎΠΉ ΡΡΠ°ΡΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΠΎΡΠ΅Π½ΠΊΠ° ΡΠ΅ΡΡΡΡΠ° ΡΠ°Π±ΠΎΡΡ Π·ΠΎΠ½Π΄ΠΎΠ² ΡΠ°Π·Π»ΠΈΡΠ½ΡΡ
ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΉ Π΄Π»Ρ ΡΠ»Π΅ΠΊΡΡΠΎΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΉ Π»ΠΈΡΠΎΡΡΠΈΠΏΡΠΈΠΈ, Π²ΡΡΠ²Π»Π΅Π½Ρ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΡΠ°ΡΡΠΎ Π²ΠΎΠ·Π½ΠΈΠΊΠ°ΡΡΠΈΠ΅ Π΄Π΅ΡΠ΅ΠΊΡΡ. Π‘Π΄Π΅Π»Π°Π½Ρ Π²ΡΠ²ΠΎΠ΄Ρ ΠΎ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π°Ρ
ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΈ Π΄Π°Π»ΡΠ½Π΅ΠΉΡΠ΅Π³ΠΎ ΡΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΡ ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΉ
- β¦