Hall Effect under Pressure and Phase Transitions in the Organic Superconductors, .KAPPA.-(BEDT-TTF)2Cu(NCS)2 and .BETA.-(BEDT-TTF)2I3.

• Murata Keizo

  Faculty of Science, Osaka City University

Bibliographic Information

Other Title

• Hall Effect under Pressure and Phase Transitions in the Organic Superconductors,κ-(BEDT-TTF)2Cu(NCS)2 and β-(BEDT-TTF)2I3
• Hall Effect under Pressure and Phase Tr

Abstract

The Hall effect, R_H (T) of organic conductors, even if they are metallic, is strongly temperature dependent and varies with pressure. By increasing pressure, R_H (T) converges to a single curve, which is typical to the structure of each Fermi surface, low temperature novel states or excitations are suppressed. When R_H (T) deviates abruptly from the “typical” R_H (T) -behavior, it is a strong signal for finding phase transitions or precursor. We show the example in κ- (BEDT-TTF) ₂Cu (NCS) ₂ and in β- (BEDT-TTF) ₂I₃ with which anomaly in R_H (T) corresponds to a peak (∼60 K) of antiferromagnetic fluctuation, and to 20 K- phase transition which is associated with tow-T_c superconductivity, respectively. Further, it turned out that the simple temperature-independent R_H (T) is only realized in a material where the Fermi surface is round and simple in these low dimensional systems.

Journal

• The Review of High Pressure Science and Technology

  The Review of High Pressure Science and Technology 7 407-411, 1998

  The Japan Society of High Pressure Science and Technology

Keywords

• Hall Effect
• Phase Transition
• Organic Superconductor
• (BEDT-TTF) <SUB>2</SUB>X

Details

• CRID: 1390001204382307200
• NII Article ID: 10002690325
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.7.407
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 4493941
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4493941
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed