兰州大学固体物理第3章晶体结合ppt课件.ppt

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1、ClNaClNa,510cm1310eereeXKANH.eH21210212CXmPH2222212CXmPmc02120212121XmCX2220222121XmCX221221221XReXReXXReReHRXX21.1111111 212121RXRXRXXReH.11 22121121RXXRXXRXX321212RXXeH )(2121XXXs)(2121XXXa)(2111asPPXmP)(2122asPPXmP)(211asXXX)(212asXXX2322102212ssXReCmPHHH23222212aaXReCmP322ReCC21320)21 (CRes21320

2、)21 (CRea0mc0)21( nE)21 ()21(212121213221320CReCReas2132)21CRe2132)21CRe)2(21132CRe.)2(81232CRe)2(811 )21(2)2(41221212123202320CReCReas（A是一个常数）62320)2(81RACReuRenRB3、林纳-琼斯势（Lennanl-Jouns）考虑惰性气体晶体中两个原子的互作用势（即对势一对原子间的互作用势），据前面的分析，它们之间的相互作用能可写成：612)(RARBRu6124)(Ru612)()RR4)(ijijRu612)()ijijRRj4iuj612)(

3、)ijijRRtotiuNu22212NuNuNuijjitotj)612)()ijijRRRRPijij21totuj)612)()RPRPijij12)(ijjP12A6)(ijjP6A12Atotu661212)()(RARA6A0dRdutotNdRdutot206120766131212RRRARA616120)2(AAR612.AA0R0RaR2200R)(0Rutot)(4514)(131260120RR0R)(0Rutot152)(0NRutotTPVVk)(1TVPVB)(dVduPPdVdu22dVuddVdu22dVudVB NUuNVv22dVudvb 341aRa23

4、3322)2(4141RRadRRdvRRv233232122RvRvRRv232)32(322223dRduRRRRb)1(922dRduRRRb00RRdRdu00220092RRRRdRudRbbu)()(661212RARA45.1413.12612AA325126123075)(40AAAbbRR21010cmdyne375pjrijeUijrq2对最近邻）（对最近邻以远）(22RqeRPqijRijURrPijijRPeZUUijjpRijji2RPqeZNNUUijjRitot2ijjP)(RqeZNURtot2(00RRtotdRdU00022RRRRgNeNZZqeRR22000R0R0RtotU)1 ()(0020RRqNRUtot1010RijjP)(RRPijijRPrijijijjrR)(.4131211 2RRRRR.43)1 (432xxxxxxn.4131211 2.)4131211 (2n22n