| Issue |
EPL
Volume 79, Number 1, July 2007
|
|
|---|---|---|
| Article Number | 17006 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/79/17006 | |
| Published online | 20 June 2007 | |
Anomalous thermopower and Nernst effect in CeCoIn5: Loss of entropy current in precursor state
1
Department of Physics, Princeton University - Princeton, NJ 08544, USA
2
Department of Physics, Brookhaven National Laboratory - Upton, NY 11973, USA
Received:
8
May
2007
Accepted:
30
May
2007
The heavy-electron superconductor CeCoIn5 exhibits a puzzling precursor state
above its superconducting critical temperature at Tc = 2.3 K.
The thermopower and Nernst signal are anomalous. Below 15 K, the entropy current
of the electrons undergoes a steep decrease reaching ~0 at Tc. Concurrently, the off-diagonal thermoelectric current 
is enhanced. The delicate sensitivity of the zero-entropy state to field implies phase coherence over large
distances. The prominent anomalies in the thermoelectric current contrast with
the relatively weak effects in the resistivity and magnetization.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 72.15.Eb – Electrical and thermal conduction in crystalline metals and alloys / 74.70.Tx – Heavy-fermion superconductors
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.