Issue |
Europhys. Lett.
Volume 62, Number 2, April 2003
|
|
---|---|---|
Page(s) | 264 - 270 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-00355-6 | |
Published online | 01 April 2003 |
Parity-dependent Kondo effect in ultrasmall metallic grains
1
SMC-INFM and Dipartimento di Fisica, Università “La
Sapienza” P.le A. Moro 2, I-00185 Roma, Italy
2
INFM and Dipartimento di Ingegneria
dell'Informazione Seconda Università di Napoli - I-81031, Aversa (Na), Italy
3
NEST-INFM and Dipartimento di Fisica “E. Amaldi”,
Università di Roma Tre Via della Vasca Navale 84, I-00146 Roma,
Italy
4
NEST-INFM and Scuola Normale Superiore - I-56126 Pisa, Italy
Received:
20
December
2002
Accepted:
18
February
2003
In this letter we study the Kondo effect in an ultrasmall metallic grain, i.e. small enough to have a discrete energy-level spectrum, by calculating the susceptibility χ of the magnetic impurity. Our quantum Monte Carlo simulations, and analytic solution of a simple model, show that the behavior changes dramatically depending on whether the number of electrons in the grain is even or odd. We suggest that the measurements of χ provide an effective experimental way of probing the grain's number parity.
PACS: 75.75.+a – Magnetic properties of nanostructures / 73.63.-b – Electronic transport in mesoscopic or nanoscale materials and structures
© EDP Sciences, 2003
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