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020 ▼a 9781392467602
035 ▼a (MiAaPQ)AAI27548079
040 ▼a MiAaPQ ▼c MiAaPQ ▼d 247004
0820 ▼a 530
1001 ▼a Shao, Yinming .
24510 ▼a Infrared Electrodynamics of Dirac Materials.
260 ▼a [S.l.]: ▼b Columbia University., ▼c 2020.
260 1 ▼a Ann Arbor: ▼b ProQuest Dissertations & Theses, ▼c 2020.
300 ▼a 126 p.
500 ▼a Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
500 ▼a Advisor: Basov, Dmitri N.
5021 ▼a Thesis (Ph.D.)--Columbia University, 2020.
506 ▼a This item must not be sold to any third party vendors.
520 ▼a This dissertation reports on infrared optical spectroscopic studies of a novel class of materials named Dirac materials, which cover a broad range of materials including Topological Insulators (TI) and Dirac/Nodal-line semimetals. These materials share a similar low-energy Hamiltonian that can be described by massless/massive Dirac fermions. Adding out-of-plane magnetic field generates additional features in the optical spectra that allow us to distinguish Dirac fermions with usual fermions with parabolic bands. I will first demonstrate identifications of surface states (SS) of TI using Faraday rotation spectroscopy, where both the top and bottom SS can be identified and found to host carriers of opposite sign. Secondly, I will generalize the power-law behavior for two-dimensional (2D) and three-dimensional (3D) Dirac semimetals to dispersive nodal-line semimetals. This leads to the discoveries of Dirac nodal-lines in topological semimetal NbAs2. Finally,the optical signatures of electronic correlations are discussed and the unexplored overlapping area between strongly correlated systems and Dirac semimetals are studied. The prominent correlation effects in nodal-line semimetal ZrSiSe uncovered by a combinationof optical and magneto-optical spectroscopies will be discussed.
590 ▼a School code: 0054.
650 4 ▼a Condensed matter physics.
650 4 ▼a Applied physics.
650 4 ▼a Quantum physics.
690 ▼a 0611
690 ▼a 0599
690 ▼a 0215
71020 ▼a Columbia University. ▼b Physics.
7730 ▼t Dissertations Abstracts International ▼g 81-05B.
773 ▼t Dissertation Abstract International
790 ▼a 0054
791 ▼a Ph.D.
792 ▼a 2020
793 ▼a English
85640 ▼u http://www.riss.kr/pdu/ddodLink.do?id=T15494517 ▼n KERIS ▼z 이 자료의 원문은 한국교육학술정보원에서 제공합니다.
980 ▼a 202002 ▼f 2020
990 ▼a ***1008102
991 ▼a E-BOOK