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Titolo:
TUNNELING CURRENT OSCILLATIONS EXCITED BY DC-VOLTAGE
Autore:
MARTIN G; WEIHNACHT M;
Indirizzi:
INST FESTKORPER & WERKSTOFFORSCH DRESDEN,POB 270016 D-01171 DRESDEN GERMANY
Titolo Testata:
Annalen der Physik
fascicolo: 5, volume: 6, anno: 1997,
pagine: 364 - 380
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROSCOPY;
Keywords:
SCANNING TUNNELING MICROSCOPE; TUNNELING CURRENT OSCILLATIONS; SAMPLE-TIP INTERACTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
G. Martin e M. Weihnacht, "TUNNELING CURRENT OSCILLATIONS EXCITED BY DC-VOLTAGE", Annalen der Physik, 6(5), 1997, pp. 364-380

Abstract

Investigating a polycrystalline gold laver on glass bq a scanning tunneling microscope in air, tunneling current oscillations were found. which are excited by the DC voltage across the gap. The oscillation amplitude is dependent on the place on the surface of the sample and correlates with its topography. The frequency spectra of these oscillations are influenced by resonances of the mechanical system (z-piezo/sample holder/transducer/sample). A piezoelectric transducer is able to detect alternating forces originating from the tunnel junction. The resonances in the spectrum of the AC tunneling current and the mechanical resonances of the STM system seem to be related. Trapping and subsequent delayed desorption of charge carriers at localized surface states could play a role in generating the observed time-dependent forces across the gap and thereby creating tunneling current oscillations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:04:31