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Transport in manganites under high p...

Bradley, Keith.

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Transport in manganites under high pressure and single-walled carbon nanotubes.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Transport in manganites under high pressure and single-walled carbon nanotubes./
作者:	Bradley, Keith.
面頁冊數:	135 p.
附註:	Chair: Alex K. Zettl.
Contained By:	Dissertation Abstracts International62-07B.
標題:	Physics, Condensed Matter. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3019601
ISBN:	0493307834

Transport in manganites under high pressure and single-walled carbon nanotubes.
Bradley, Keith.

Transport in manganites under high pressure and single-walled carbon nanotubes. - 135 p.

Chair: Alex K. Zettl.

Thesis (Ph.D.)--University of California, Berkeley, 2001.

This thesis consists of two parts. The first part discusses a high-pressure search for superconductivity in manganites. Colossal magnetoresistance manganites are reviewed. No superconductivity is observed in La0.6Pb 0.4MnO3 or Nd0.66Pb0.33MnO3 at pressures up to 150 kbar and temperatures down to 2.2 K. New techniques for measuring resistance under hydrostatic pressure, developed for this experiment, are described in detail.

ISBN: 0493307834Subjects--Topical Terms:

1018743
Physics, Condensed Matter.

Transport in manganites under high pressure and single-walled carbon nanotubes.
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100 1 $a Bradley, Keith. $3 859474
245 1 0 $a Transport in manganites under high pressure and single-walled carbon nanotubes.
300 $a 135 p.
500 $a Chair: Alex K. Zettl.
500 $a Source: Dissertation Abstracts International, Volume: 62-07, Section: B, page: 3239.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2001.
520 $a This thesis consists of two parts. The first part discusses a high-pressure search for superconductivity in manganites. Colossal magnetoresistance manganites are reviewed. No superconductivity is observed in La0.6Pb 0.4MnO3 or Nd0.66Pb0.33MnO3 at pressures up to 150 kbar and temperatures down to 2.2 K. New techniques for measuring resistance under hydrostatic pressure, developed for this experiment, are described in detail.
520 $a The second part discusses several transport experiments on single-walled carbon nano-tubes. The thermoelectric power of bulk samples is examined to identify the effect of atmospheric gas. Negative thermopower is discovered in degassed nanotubes. The binding energy of adsorbed oxygen on nanotubes is estimated to be 0.4 eV. A model involving degenerate doping is presented to account for the range of thermopower data. Measurements of 1/<italic>f </italic> noise support the idea that oxygen adds carriers to nanotubes. The last chapter describes an attempt to observe shot noise in carbon nanotube devices. Measurements of noise is measured as a function of frequency between 100 MHz and 1 GHz obviate the 1/<italic>f</italic> noise spectrum. The first measurement is reported, in which diffusive conduction is observed in a nanotube rope device 1 micron long.
590 $a School code: 0028.
650 4 $a Physics, Condensed Matter. $3 1018743
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710 2 0 $a University of California, Berkeley. $3 687832
773 0 $t Dissertation Abstracts International $g 62-07B.
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790 1 0 $a Zettl, Alex K., $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3019601