Published December 2, 2013 | Version v1
Journal article Metadata-only

Carrier-number fluctuations in the 2-dimensional electron gas at the LaAlO3/SrTiO3 interface

Creators

  • 1. Dipartimento di Fisica "E. R. Caianiello" and CNR-SPIN Salerno, Università di Salerno, I-84084 Fisciano, Salerno (Italy)
  • 2. CNR-SPIN Napoli and Dipartimento di Fisica, Università di Napoli "Federico II," I-80126 Napoli (Italy)
  • 3. CNR-SPIN Genova and Dipartimento di Fisica, Università di Genova, I-16152 Genova (Italy)

Description

The voltage-spectral density SV (f) of the 2-dimensional electron gas formed at the interface of LaAlO3/SrTiO3 has been thoroughly investigated. The low-frequency component has a clear 1/f behavior with a quadratic bias current dependence, attributed to resistance fluctuations. However, its temperature dependence is inconsistent with the classical Hooge model, based on carrier-mobility fluctuations. The experimental results are, instead, explained in terms of carrier-number fluctuations, due to an excitation-trapping mechanism of the 2-dimensional electron gas

Additional details

Identifiers

DOI
10.1063/1.4838637;
arXiv
arXiv:1312.2181v1;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
103
Journal Issue
23
Journal Page Range
p. 231601-231601.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
45075114
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
ALUMINATES; CARRIER MOBILITY; CARRIERS; ELECTRIC POTENTIAL; ELECTRON GAS; EXCITATION; FLUCTUATIONS; INTERFACES; LANTHANUM COMPOUNDS; SPECTRAL DENSITY; STRONTIUM TITANATES; TEMPERATURE DEPENDENCE
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; ENERGY-LEVEL TRANSITIONS; FUNCTIONS; MOBILITY; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SPECTRAL FUNCTIONS; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; VARIATIONS

Optional Information

Notes
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