Specific heat for ionic tunneling in a metallic environment

Autor:	Valter L. Líbero, João Vítor Batista Ferreira
Rok vydání:	2000
Předmět:	Physics Condensed matter physics Specific heat Tunneling rate Ionic bonding Numerical renormalization group Metal symbols.namesake visual_art visual_art.visual_art_medium symbols Fermi liquid theory Hamiltonian (quantum mechanics) Quantum tunnelling
Zdroj:	Physical Review B. 61:10615-10621
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.61.10615
Popis:	Instituto de Fi´sica de Sa ˜o Carlos, Caixa Postal 369, 13560-250 Sao Carlos, SP, Brazil~Received 11 November 1999!We diagonalize the Hamiltonian proposed by Kondo to describe a heavy-ion tunneling between two sites ina Fermionic bath, using the numerical renormalization group procedure. The temperature-dependent specificheat, determined from the spectrum, shows a peak close to the effective tunneling rate. At low temperature wefound Fermi liquid behavior indicating the gap suppression due to low-lying excitations of the conductionband. The entire specific-heat curve depends only on a certain characteristic combination of the Coulombpotential and spatial separation of the sites.I. INTRODUCTION
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f4f9e6c419c1ac1b68c14c35c854b7f5 https://doi.org/10.1103/physrevb.61.10615 Zobrazit plný text záznamu