講義のppt - 家研究室 - 東京大学

2008115137

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74%hcp

(1571-1630)

θd sinθ = nλ0.3 nm X

θ2θdθ2d sinθ = nλX

NeArKr, Xe ()He

HHeLi Be B C N O F NeNa +Na Mg Al Si P S Cl ArCl − K Ca Ga Ge As Se Br KrCsCl

Na:(1s)2(2s)+ ++ ++ ++ +Na +2(2 p)-e6+ ++ ++ ++ +(3s)1HLi Be B C N O F NeNa Mg Al Si P S Cl ArKHeCa Ga Ge As Se Br Kr

-e H 2+e+e-e1+e +e+e +e

CSiGeHHeLi Be B C N O F NeNa Mg Al Si P S Cl ArK Ca Ga Ge As Se Br Kr

DNA

‣ ‣ • (tight-binding model)• (nearly free electron model)

-e H 2+e+e-e

ei( kx−ωt ) i( −kx−ωt ) −iωt+ e = 2ecos( kx)

0 k−/a0 /a k

1 dε ( k)v k=h dkmdkdt=−e E0Ek

(1eV10000K0.1eVSiP--(

p-n1eV 3eV

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7s6s5s6p5p5d4d4f4s4p3d3s2s3p2pHLi BeB C N O F NeNaMgAl Si P S Cl ArK Ca Sc Ti V Cr MnFeCo Ni Cu ZnGaGeGe AsSe Br KrRbHeSr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I XeCs Ba La Hf Ta W Re Os Ir Pr Au Hg Tl Pb Bi Po At RnFrRaAcRu HaCePr Nd Pm Sm Eu Gd Tb Dy Ho ErTmYbLu1sThPa U Np Pu Am Cm Bk Cf Es FmMdNoLw

Fe 2

NSSNNS NS/2 /2J 0J 0J 1 2

HHeLiBeBCNOFNeNaMgAlSiPSClArKCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKrRbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXeCsBaLaHfTaWReOsIrPrAuHgTlPbBiPoAtRnFrRaAcRu HaCePr Nd Pm Sm Eu Gd Tb Dy Ho ErTmYbLuThPa U Np Pu Am Cm Bk Cf Es F mMdNoLrAl SiCu

MgB 2LaFeAsO

h−15= n φ0= = 2.07×10 Wb0 2 e

HH c0( )T cT

MM0H cH0Hc1H cHc2HBB0H cH 0 Hc1Hc2H

φ0h=2 e=2.07×10−15Wb

(Essmann & Traueble,1968) , 1992Hess, 1989)

vF = J × BE = v × B

Ψ 0 e θ 1 Ψ 0 e θ 2Ψ 0 e θ 1 Ψ 0 e θ 2J= Jcsin( θ −θ) 21⎛I =⎜max2Iccos 2⎝φ ⎞π⎟φ0⎠

++++++++−+++ + +++T+c⎛ 1= 1.14ΘDexp⎜−⎝ N(0)V⎞⎟⎠

BCS)

s (l = 0)(d (l = 2)p (l = 1)UP 33He

‣ YBa 2 Cu 3 O 7 Bi 2 Sr 2 CaCu 2 O 8 ‣ Sr 2 RuO 4‣ UP 3 , CeCu 2 Si 2 ‣ (TMTSF) 2 PF 6 , BEDT-TTF) 2 CuNCS 4 ‣ MgB 2‣ K 3 C 60‣ ‣

Tc⎛ 1= 1.14ΘDexp⎜−⎝ N(0)V⎞⎟⎠KLaFeAsOMgB 2T c ≈ T*exp⎛⎜ −⎝1 ⎞⎟λ ⎠

‣ ‣ • ‣ • • ‣ • • ‣ • • BCS•