Visualizing critical correlations near the metal-insulator transition in Ga1-xMnxAs

Anthony Richardella, Pedram Roushan, Shawn Mack, Brian Zhou, David A. Huse, David D. Awschalom, Ali Yazdani

Research output: Contribution to journalArticle

168 Citations (Scopus)

Abstract

Electronic states in disordered conductors on the verge of localization are predicted to exhibit critical spatial characteristics indicative of the proximity to a metal-insulator phase transition. We used scanning tunneling microscopy to visualize electronic states in Ga1-xMnxAs samples close to this transition. Our measurements show that doping-induced disorder produces strong spatial variations in the local tunneling conductance across a wide range of energies. Near the Fermi energy, where spectroscopic signatures of electron-electron interaction are the most prominent, the electronic states exhibit a diverging spatial correlation length. Power-law decay of the spatial correlations is accompanied by log-normal distributions of the local density of states and multifractal spatial characteristics.

Original languageEnglish (US)
Pages (from-to)665-669
Number of pages5
JournalScience
Volume327
Issue number5966
DOIs
StatePublished - Feb 5 2010

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Scanning Tunnelling Microscopy
Metals
Electrons
Normal Distribution
Phase Transition

All Science Journal Classification (ASJC) codes

  • General

Cite this

Richardella, A., Roushan, P., Mack, S., Zhou, B., Huse, D. A., Awschalom, D. D., & Yazdani, A. (2010). Visualizing critical correlations near the metal-insulator transition in Ga1-xMnxAs. Science, 327(5966), 665-669. https://doi.org/10.1126/science.1183640
Richardella, Anthony ; Roushan, Pedram ; Mack, Shawn ; Zhou, Brian ; Huse, David A. ; Awschalom, David D. ; Yazdani, Ali. / Visualizing critical correlations near the metal-insulator transition in Ga1-xMnxAs. In: Science. 2010 ; Vol. 327, No. 5966. pp. 665-669.
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Richardella, A, Roushan, P, Mack, S, Zhou, B, Huse, DA, Awschalom, DD & Yazdani, A 2010, 'Visualizing critical correlations near the metal-insulator transition in Ga1-xMnxAs', Science, vol. 327, no. 5966, pp. 665-669. https://doi.org/10.1126/science.1183640

Visualizing critical correlations near the metal-insulator transition in Ga1-xMnxAs. / Richardella, Anthony; Roushan, Pedram; Mack, Shawn; Zhou, Brian; Huse, David A.; Awschalom, David D.; Yazdani, Ali.

In: Science, Vol. 327, No. 5966, 05.02.2010, p. 665-669.

Research output: Contribution to journalArticle

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