Theory for phonon-induced superconductivity in MgB2
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Theory for phonon-induced superconductivity in MgB2. / Joas, C.; Eremin, Ilya; Manske, D.; Bennemann, K. H.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 13, 132518, 01.04.2002, p. 1325181-1325184.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Theory for phonon-induced superconductivity in MgB2
AU - Joas, C.
AU - Eremin, Ilya
AU - Manske, D.
AU - Bennemann, K. H.
PY - 2002/4/1
Y1 - 2002/4/1
N2 - We analyze superconductivity in MgB2 observed below Tc = 39 K resulting from electron-phonon coupling involving a mode at ℏω1 = 24 meV and, most importantly, the in-plane B-B E2g vibration at ℏω2 = 67 meV. The quasiparticles originating from π and σ states couple strongly to the low-frequency mode and the E2g vibrations, respectively. Using two-band Eliashberg theory, λπ = 1.4 and λσ = 0.7, we calculate the gap functions Δi(ω,O) (i = π, σ). Our results provide an explanation of recent tunneling experiments. We get Hc2ab/Hc2c ≈ 3.9.
AB - We analyze superconductivity in MgB2 observed below Tc = 39 K resulting from electron-phonon coupling involving a mode at ℏω1 = 24 meV and, most importantly, the in-plane B-B E2g vibration at ℏω2 = 67 meV. The quasiparticles originating from π and σ states couple strongly to the low-frequency mode and the E2g vibrations, respectively. Using two-band Eliashberg theory, λπ = 1.4 and λσ = 0.7, we calculate the gap functions Δi(ω,O) (i = π, σ). Our results provide an explanation of recent tunneling experiments. We get Hc2ab/Hc2c ≈ 3.9.
UR - http://www.scopus.com/inward/record.url?scp=0036538014&partnerID=8YFLogxK
M3 - Journal article
AN - SCOPUS:0036538014
VL - 65
SP - 1325181
EP - 1325184
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 13
M1 - 132518
ER -
ID: 226827831