Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7

The behavior of matter near zero temperature continuous phase transitions, or "quantum critical points" is a central topic of study in condensed matter physics. In fermionic systems, fundamental questions remain unanswered: the nature of the quantum critical regime is unclear because of th...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rost, A. W., Grigera, Santiago Andrés, Bruin, J. A.N., Perry, R. S., Tian, D., Raghu, S., Kivelson, Steven Allan, Mackenzie, A. P.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Química
Heavy fermion behavior
Nematic metal
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84611
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84611
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Heavy fermion behavior
Nematic metal
spellingShingle Química
Heavy fermion behavior
Nematic metal
Rost, A. W.
Grigera, Santiago Andrés
Bruin, J. A.N.
Perry, R. S.
Tian, D.
Raghu, S.
Kivelson, Steven Allan
Mackenzie, A. P.
Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
topic_facet Química
Heavy fermion behavior
Nematic metal
description The behavior of matter near zero temperature continuous phase transitions, or "quantum critical points" is a central topic of study in condensed matter physics. In fermionic systems, fundamental questions remain unanswered: the nature of the quantum critical regime is unclear because of the apparent breakdown of the concept of the quasiparticle, a cornerstone of existing theories of strongly interacting metals. Even less is known experimentally about the formation of ordered phases from such a quantum critical "soup." Here, we report a study of the specific heat across the phase diagram of the model system Sr 3Ru 2O 7, which features an anomalous phase whose transport properties are consistent with those of an electronic nematic. We show that this phase, which exists at low temperatures in a narrow range of magnetic fields, forms directly from a quantum critical state, and contains more entropy than mean-field calculations predict. Our results suggest that this extra entropy is due to remnant degrees of freedom from the highly entropic state above T c . The associated quantum critical point, which is "concealed" by the nematic phase, separates two Fermi liquids, neither of which has an identifiable spontaneously broken symmetry, but which likely differ in the topology of their Fermi surfaces.
format Articulo
Articulo
author Rost, A. W.
Grigera, Santiago Andrés
Bruin, J. A.N.
Perry, R. S.
Tian, D.
Raghu, S.
Kivelson, Steven Allan
Mackenzie, A. P.
author_facet Rost, A. W.
Grigera, Santiago Andrés
Bruin, J. A.N.
Perry, R. S.
Tian, D.
Raghu, S.
Kivelson, Steven Allan
Mackenzie, A. P.
author_sort Rost, A. W.
title Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
title_short Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
title_full Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
title_fullStr Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
title_full_unstemmed Thermodynamics of phase formation in the quantum critical metal Sr 3Ru 2O 7
title_sort thermodynamics of phase formation in the quantum critical metal sr 3ru 2o 7
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84611
work_keys_str_mv AT rostaw thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT grigerasantiagoandres thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT bruinjan thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT perryrs thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT tiand thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT raghus thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT kivelsonstevenallan thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
AT mackenzieap thermodynamicsofphaseformationinthequantumcriticalmetalsr3ru2o7
bdutipo_str Repositorios
_version_ 1764820488969781249

Ejemplares similares