Pressure-induced Magnetic Quantum Phase Transition from Gapped Ground State in TlCuCl3

• Goto Kenji

  Department of Physics, Tokyo Institute of Technology

• Fujisawa Masashi

  Department of Physics, Tokyo Institute of Technology

• Ono Toshio

  Department of Physics, Tokyo Institute of Technology

• Tanaka Hidekazu

  Research Center for Low Temperature Physics, Tokyo Institute of Technology

• Uwatoko Yoshiya

  Institute for Solid State Physics, The University of Tokyo

Bibliographic Information

Other Title

• Pressure-induced Magnetic Quantum Phase Transition from Gapped Ground State in TlCuCl₃

Abstract

Magnetization measurements under hydrostatic pressure were performed on an S=1⁄2 coupled spin dimer system TlCuCl₃ with a gapped ground state under magnetic field H parallel to the [201] direction. With increasing applied pressure P, the gap decreases and closes completely at P_c=0.42±0.05 kbar. For P>P_c, TlCuCl₃ undergoes antiferromagnetic ordering. A spin-flop transition was observed at H_sf\\simeq0.7 T. The spin-flop field is approximately independent of pressure, although the sublattice magnetization increases with pressure. The gap and Néel temperature are presented as functions of pressure. The occurrence of the pressure-induced quantum phase transition is attributed to the relative enhancement of the interdimer exchange interactions compared with the intradimer exchange interaction.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 73 (12), 3254-3257, 2004

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• TlCuCl<SUB>3</SUB>
• spin gap
• pressure-induced ordering
• quantum phase transition
• quantum critical point

Details

• CRID: 1390001204188438656
• NII Article ID: 210000105185
• NII Article ID: 110001979290
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.73.3254
• BIBCODE: 2004JPSJ...73.3254G
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 7185863
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7185863
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.73.3254
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed