東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Transport Experiments of Topological...

Xiong, Jun.

FindBook

Google Book

Amazon

博客來

Transport Experiments of Topological Insulators and Dirac Semimetals.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Transport Experiments of Topological Insulators and Dirac Semimetals./
作者:	Xiong, Jun.
面頁冊數:	145 p.
附註:	Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
Contained By:	Dissertation Abstracts International77-08B(E).
標題:	Condensed matter physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10090227
ISBN:	9781339595559

Transport Experiments of Topological Insulators and Dirac Semimetals.
Xiong, Jun.

Transport Experiments of Topological Insulators and Dirac Semimetals. - 145 p.

Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.

Thesis (Ph.D.)--Princeton University, 2016.

The progress in understanding the Berry phase of Bloch electrons in crystals has triggered tremendous interest in discovering novel topological phases of solids. The integration of the Berry curvature in the Brillouin zone can categorize solids into phases such as topological insulators (TI), Dirac semimetals (DSM) and Weyl semimetals (WSM). These new phases have unconventional electronic states at the boundaries, such as the spin polarized electrons on the surface of a three-dimensional TI. Under proper engineering, such edge states can carry a dissipationless current, leading to a great application potential in low-power devices and topological quantum computers.

ISBN: 9781339595559Subjects--Topical Terms:

3173567
Condensed matter physics.

Transport Experiments of Topological Insulators and Dirac Semimetals.
LDR:03170nmm a2200301 4500 001 2077203
005 20161114130236.5
008 170521s2016 ||||||||||||||||| ||eng d
020 $a 9781339595559
035 $a (MiAaPQ)AAI10090227
035 $a AAI10090227
040 $a MiAaPQ $c MiAaPQ
100 1 $a Xiong, Jun. $3 3192704
245 1 0 $a Transport Experiments of Topological Insulators and Dirac Semimetals.
300 $a 145 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-08(E), Section: B.
500 $a Adviser: Nai P. Ong.
502 $a Thesis (Ph.D.)--Princeton University, 2016.
520 $a The progress in understanding the Berry phase of Bloch electrons in crystals has triggered tremendous interest in discovering novel topological phases of solids. The integration of the Berry curvature in the Brillouin zone can categorize solids into phases such as topological insulators (TI), Dirac semimetals (DSM) and Weyl semimetals (WSM). These new phases have unconventional electronic states at the boundaries, such as the spin polarized electrons on the surface of a three-dimensional TI. Under proper engineering, such edge states can carry a dissipationless current, leading to a great application potential in low-power devices and topological quantum computers.
520 $a Besides TI, the newly discovered Dirac and Weyl semimetals represent another example in which electrons have a linear energy-momentum dispersion. The paired Weyl nodes have opposite chiralities, and can be regarded as positive and negative monopoles of the Berry flux. Under the time-reversal, inversion and certain crystal symmetries, as in the cases of Cd3As2 and Na3Bi, the Weyl nodes with different chiralities can coexist at the same point in the Brillouin zone and the crystal becomes a Dirac semimetal. Such semimetals provide platforms for some phenomena in high energy physics, such as the chiral anomaly effect.
520 $a The above predictions lie at the heart of our experimental study of topological materials. We synthesized a topological insulator, Bi2Te2 Se, with a suppressed bulk carrier density. Analysis of the prominent Shubnikov-de Haas oscillations in Bi2Te2Se demonstrates clear evidence for the Dirac surface electrons and their pi Berry phase. We also leveraged the ionic liquid gating technique to bring the chemical potential 50% closer to the Dirac point. Additionally, we studied two types of Na3Bi, a DSM. The first type with a high chemical potential exhibits a large and linear magnetoresistance (MR), implying a transport lifetime steeply tuned by the magnetic field. In the second type of Na3Bi with a low chemical potential, we observed a novel, negative and highly anisotropic magnetoresistance. By rotating both the electric and magnetic fields, we demonstrate that the negative MR pattern is consistent with the theoretical prediction for the chiral anomaly effect in a DSM.
590 $a School code: 0181.
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Quantum physics. $3 726746
690 $a 0611
690 $a 0599
710 2 $a Princeton University. $b Physics. $3 2101570
773 0 $t Dissertation Abstracts International $g 77-08B(E).
790 $a 0181
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10090227