自旋軌道耦合驅(qū)動(dòng)下二維質(zhì)量不相等費(fèi)米氣體的拓?fù)湎?/H1>
發(fā)布時(shí)間：2018-01-05 08:02
本文關(guān)鍵詞：自旋軌道耦合驅(qū)動(dòng)下二維質(zhì)量不相等費(fèi)米氣體的拓?fù)湎?/strong> 出處：《山西大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期
論文類型：期刊論文
更多相關(guān)文章： 費(fèi)米氣體 自旋軌道耦合(SOC) 質(zhì)量不相等 拓?fù)湎?/b>
【摘要】：用平均場(chǎng)理論研究了二維質(zhì)量不相等費(fèi)米氣系統(tǒng)的零溫特性,該系統(tǒng)具有equal-Rashba-Dresselhaus(ERD)型自旋軌道耦合作用和Zeeman場(chǎng)。在該系統(tǒng)中存在三種不同的超流相(US-0相、US-1相、US-2相),我們通過數(shù)值分析能隙方程和粒子數(shù)方程組成的自洽方程組,發(fā)現(xiàn)二維費(fèi)米氣系統(tǒng)的質(zhì)量相差越大,Zeeman場(chǎng)對(duì)超流序參量Δ的抑制作用就會(huì)越強(qiáng)。在弱吸引相互作用區(qū)域,隨著自旋軌道耦合強(qiáng)度的增加,US-2拓?fù)涑飨鄷?huì)逐漸收縮。自旋軌道耦合強(qiáng)度一定情況下,質(zhì)量比0λ≤1時(shí),只有在弱吸引相互作用區(qū)域存在US-2拓?fù)涑飨?當(dāng)質(zhì)量比λ1時(shí),在弱相互作用區(qū)域和強(qiáng)相互作用區(qū)域都存在US-2拓?fù)涑飨唷?br/>[Abstract]:In this paper, the zero-temperature characteristic of two-dimensional Fermi gas system with unequal mass is studied by means of the mean field theory. The system has equal-Rashba-Dresselhauser ERD type spin-orbit coupling and Zeeman field. There are three different superflow phases in the system. US-0 phase. By numerical analysis of the self-consistent equations composed of the energy gap equation and the particle number equation, it is found that the mass difference of the two-dimensional Fermi gas system is greater than that of the two dimensional Fermi gas system. The stronger the suppression of the superfluid order parameter 螖 by the Zeeman field is, the more the coupling strength of the spin orbit increases in the region of weak attraction interaction. The supercurrent phase of US-2 topology will shrink gradually. When the spin-orbit coupling strength is constant, the mass ratio of 0 位 鈮，
本文編號(hào)：1382234
本文鏈接：http://sikaile.net/kejilunwen/wulilw/1382234.html
本文關(guān)鍵詞：自旋軌道耦合驅(qū)動(dòng)下二維質(zhì)量不相等費(fèi)米氣體的拓?fù)湎?/strong> 出處：《山西大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期 論文類型：期刊論文
更多相關(guān)文章： 費(fèi)米氣體 自旋軌道耦合(SOC) 質(zhì)量不相等 拓?fù)湎?/b>
【摘要】：用平均場(chǎng)理論研究了二維質(zhì)量不相等費(fèi)米氣系統(tǒng)的零溫特性,該系統(tǒng)具有equal-Rashba-Dresselhaus(ERD)型自旋軌道耦合作用和Zeeman場(chǎng)。在該系統(tǒng)中存在三種不同的超流相(US-0相、US-1相、US-2相),我們通過數(shù)值分析能隙方程和粒子數(shù)方程組成的自洽方程組,發(fā)現(xiàn)二維費(fèi)米氣系統(tǒng)的質(zhì)量相差越大,Zeeman場(chǎng)對(duì)超流序參量Δ的抑制作用就會(huì)越強(qiáng)。在弱吸引相互作用區(qū)域,隨著自旋軌道耦合強(qiáng)度的增加,US-2拓?fù)涑飨鄷?huì)逐漸收縮。自旋軌道耦合強(qiáng)度一定情況下,質(zhì)量比0λ≤1時(shí),只有在弱吸引相互作用區(qū)域存在US-2拓?fù)涑飨?當(dāng)質(zhì)量比λ1時(shí),在弱相互作用區(qū)域和強(qiáng)相互作用區(qū)域都存在US-2拓?fù)涑飨唷?br/>[Abstract]:In this paper, the zero-temperature characteristic of two-dimensional Fermi gas system with unequal mass is studied by means of the mean field theory. The system has equal-Rashba-Dresselhauser ERD type spin-orbit coupling and Zeeman field. There are three different superflow phases in the system. US-0 phase. By numerical analysis of the self-consistent equations composed of the energy gap equation and the particle number equation, it is found that the mass difference of the two-dimensional Fermi gas system is greater than that of the two dimensional Fermi gas system. The stronger the suppression of the superfluid order parameter 螖 by the Zeeman field is, the more the coupling strength of the spin orbit increases in the region of weak attraction interaction. The supercurrent phase of US-2 topology will shrink gradually. When the spin-orbit coupling strength is constant, the mass ratio of 0 位 鈮，
本文編號(hào)：1382234
本文鏈接：http://sikaile.net/kejilunwen/wulilw/1382234.html
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