A set-up for measurement of low frequency conductance fluctuation (noise) using digital signal processing techniques
| dc.creator | Ghosh, Arindam | |
| dc.creator | Kar, Swastik | |
| dc.creator | Bid, Aveek | |
| dc.creator | Raychaudhuri, A. K. | |
| dc.date | 2004-02-04 | |
| dc.date.accessioned | 2026-07-07T02:56:18Z | |
| dc.date.available | 2026-07-07T02:56:18Z | |
| dc.description | We describe a set up for measurements of low frequency (1 mHz < f < 20 Hz) conductance fluctuations in a solid conductor. The set-up uses a five probe a.c. measurement technique and extensive digital signal processing to reach a noise floor down to $S_{v}(f) \leq 10^{-20}$ V$^{2}$Hz$^{-1}$. The set up also allows measurement of noise using an a.c. in presence of a superimposed direct current. This feature is desirable in studies of electromigration damage or in systems that show non-linear conductivity. In addition, we describe a scheme which allows us to obtain the probability density function of the conductance fluctuation after subtracting the extraneous noise contributions (background) from the observed noise. The set-up has been used for conductance fluctuation measurement in the temperature range 1.5 K < T < 500 K in the presence of magnetic fields. We present some representative data obtained by this system. | |
| dc.description | 25 pages 17 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0402130 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0402130 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23267 | |
| dc.subject | Other Condensed Matter | |
| dc.title | A set-up for measurement of low frequency conductance fluctuation (noise) using digital signal processing techniques | |
| dc.type | text |