Dirac(视频压缩格式)
费米子
布洛赫波
狄拉克方程
量子力学
布洛赫振荡
作者
Jan Wilhelm,Patrick Grössing,Adrian Seith,Jack Crewse,Maximilian Nitsch,Leonard Weigl,C. P. Schmid,Ferdinand Evers
出处
期刊:Physical Review B
[American Physical Society]
日期:2021-03-18
卷期号:103 (12): 125419-
被引量:1
标识
DOI:10.1103/physrevb.103.125419
摘要
We rederive the semiconductor Bloch equations emphasizing the close link to the Berry connection. Our rigorous derivation reveals the existence of two further contributions to the current, in addition to the frequently considered intraband and polarization-related interband terms. The extra contributions become sizable in situations with strong dephasing or when the dipole-matrix elements are strongly wave-number dependent. We apply the formalism to high-harmonic generation for a Dirac metal. The extra terms add to the frequency-dependent emission intensity (high-harmonic spectrum) significantly at certain frequencies changing the total signal up to a factor of 10.
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