Further more , we also calculated the normalized temperature and the normalized pressure of the critical point ( tc , pc ) in the 2d monatomic system . and we gave some discussions about the qualities around the critical point 另外,我們還進(jìn)一步計(jì)算得到了二維單元l - j系統(tǒng)的臨界點(diǎn),并對(duì)其臨界點(diǎn)附近的一些性質(zhì)進(jìn)行了討論。
Using the thermodynamic conditions describing the coexistence of two phases and the stability conditions of equilibrium state , we have calculated the normalized temperature and the normalized pressure of the triple point ( t1 , p1 ) , the melting curve , vapouring curve and the sublimation curve . the whole phase diagram of the 2d monatomic l - j system is obtained 和杜宜瑾等人的方法類似,我們先給出了系統(tǒng)在相變點(diǎn)時(shí)的一些參數(shù)的數(shù)值,在此基礎(chǔ)上,考慮占據(jù)率q的因素,利用相平衡的熱力學(xué)條件及平衡態(tài)的穩(wěn)定性條件,得到了二維單元l - j系統(tǒng)的熔化曲線、汽化曲線、升華曲線以及三相點(diǎn)的位置,從而給出了該系統(tǒng)的完整的三相圖。
For further researching the influence on the phase transition curve by these parameters , we first present discussions on the " cigar type " phase diagram by the normalized pressure or the ratio of the mixed energies . we fixed the other parameters and changed the normalized pressure or the ratio of the mixed energies only . the results show that the lattice structure , the phase transition normalized temperature and the coexistence area of the phase diagram changed with the variety of the given parameters in certain regularity 參戮對(duì)相圖的店響約化壓強(qiáng)和勢(shì)參數(shù)對(duì)相圖來(lái)說(shuō)都是很重要的參數(shù),為了更深人的研究約化壓強(qiáng)尸和勢(shì)參數(shù)對(duì)相圖的影響,我們首先討論了在其他參數(shù)都不變的情況下,約化壓強(qiáng)p對(duì)“雪茄型”相圖的影響,即研究當(dāng)約化壓強(qiáng)尸增大或減小時(shí),系統(tǒng)的結(jié)構(gòu)、相變溫度、相圖的共存區(qū)域等的變化規(guī)律;接著,我們又討論了在其他勢(shì)參數(shù)和約化壓強(qiáng)都不變的情況下,改變混合能比( 。