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Optical studies of charge dynamics in c-axis oriented superconducting MgB2 films | | J.J. Tu
; G.L. Carr
; V. Perebeinos
; C.C. Homes
; M. Strongin
; P.B. Allen
; W.N. Kang
; E.M. Choi
; H.J. Kim
; Sung-Ik Lee
; | | Date: |
17 Jul 2001 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | BNL), G.L. Carr (NSLS, BNL), V. Perebeinos (BNL), C.C. Homes (BNL), M. Strongin (BNL), P.B. Allen (Stony Brook), W.N. Kang (Pohang), E.M. Choi (Pohang), H.J. Kim (Pohang), and Sung-Ik Lee (Pohang | | Abstract: | Temperature dependent optical conductivities and DC resistivity of c-axis oriented superconducting (Tc = 39.6 K) MgB2 films (~ 450 nm) have been measured. The normal state ab-plane optical conductivities can be described by the Drude model with a temperature independent Drude plasma frequency of omega_{p,D}=13,600 +/- 100 cm-1 or 1.68 +/- 0.01 eV. The normal state resistivity is fitted by the Bloch-Gruneisen formula with an electron-phonon coupling constant lambda_{tr} = 0.13 +/- 0.02. The optical conductivity spectra below T_c of these films suggest that MgB2 is a multi-gap superconductor. | | Source: | arXiv, cond-mat/0107349 | | Services: | Forum | Review | PDF | Favorites | |
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