Qhov sib txawv tseem ceeb ntawm Fermi zog thiab Fermi qib yog tias Fermi lub zog yog lub zog ntawm qib fermi, qhov Fermi qib yog qhov ntsuas tsawg kawg nruj nruj electrons nyob rau hauv ib qho khoom.
Cov ntsiab lus fermi zog thiab Fermi qib yog muaj npe tom qab tus kws kho mob Enrico Fermi. Fermi zog yog tus nqi ntawm lub zog rau ib qib Fermi ntawm qhov xoom xoom (ntawm 0 K) thaum lub Fermi theem yog cov tshuaj muaj peev xwm ntawm electrons.
Fermi Zog yog dab tsi?
Fermi zog yog tus nqi ntawm lub zog rau qib Fermi ntawm qhov ntsuas kub tsis txaus (ntawm 0 K). Nws yog qhov siab tshaj plaws kinetic zog uas electron tuaj yeem muaj nyob rau ntawm qhov ntsuas kub no. Ntxiv mus, tus nqi ntawm Fermi zog yog tas li rau ib yam khoom. Peb tuaj yeem txhais lub sij hawm Fermi zog raws li qhov siab tshaj plaws nyob hauv lub zog ntawm cov khoom ntawm qhov ntsuas kub tsis txaus. Hauv lwm lo lus, tag nrho cov hluav taws xob ntawm cov khoom muaj peev xwm tuav lub zog ntawm lossis qis dua cov khoom Fermi zog ntawm 0 K kub.
Hauv cov hlau, Fermi lub zog muab qhov nrawm ntawm cov hluav taws xob thaum lub sijhawm ua haujlwm. Yog li ntawd, thaum lub sij hawm conduction ntawm hlau, tsuas yog electrons muaj zog nyob ze rau lub Fermi zog yuav pab tau rau cov txheej txheem.
Daim duab 01: Sib piv Band Gaps ntawm Hlau, Semiconductor thiab Insulator
Tsis tas li ntawd, lub tswv yim ntawm Fermi zog yog qhov tseem ceeb hauv kev piav qhia tus cwj pwm ntawm semiconductors. Piv txwv li, n-hom semiconductors muaj lawv lub zog fermi nyob ze rau ntawm cov khoom siv hluav taws xob. Hauv qhov sib piv, p-hom semiconductors muaj lawv lub zog fermi ze rau ntawm valence band.
Fermi Level yog dab tsi?
Fermi qib yog cov tshuaj muaj peev xwm ntawm electrons. Nws yog qib zog uas qhov tshwm sim ntawm kev nrhiav ib qho hluav taws xob yog 50%. Nws yog lub siab tshaj plaws nyob rau hauv molecular orbital nyob rau hauv lub valence band ntawm 0 K. Yog li ntawd, muaj ntau lub xeev tsis txaus los txais electrons. Qib Fermi nyob ntawm qhov sib txawv, nruab nrab ntawm qhov kev coj ua band thiab valence band.
Qhov txawv ntawm Fermi Zog thiab Fermi Qib yog dab tsi?
Fermi zog yog tus nqi ntawm lub zog rau qib Fermi ntawm qhov tsis muaj qhov kub thiab txias (ntawm 0 K) thaum qib Fermi yog cov tshuaj muaj peev xwm ntawm electrons. Yog li, peb tuaj yeem hais tias qhov sib txawv tseem ceeb ntawm fermi zog thiab qib Fermi yog tias Fermi lub zog yog lub zog ntawm Fermi qib whereas Fermi qib yog qhov ntsuas tsawg kawg nkaus nruj ntawm electrons hauv ib qho khoom.
Hauv qab infographic muab cov ntsiab lus ntxiv ntawm qhov sib txawv ntawm fermi zog thiab qib Fermi.
Summary – Fermi Zog vs Fermi Level
Fermi zog yog tus nqi ntawm lub zog rau qib Fermi ntawm qhov tsis muaj qhov kub thiab txias (ntawm 0 K) thaum qib Fermi yog cov tshuaj muaj peev xwm ntawm electrons. Yog li ntawd, qhov sib txawv tseem ceeb ntawm fermi zog thiab Fermi theem yog tias Fermi zog yog lub zog ntawm Fermi qib, whereas Fermi theem yog ib qho kev ntsuas tsawg kawg nkaus nruj electrons nyob rau hauv ib tug khoom.
