Quantum spin dynamics

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Interplane corrugations in the quasi-one-dimensional Fermi surface sections of kappa-(BEDT-TTF)(2)Cu(SCN)(2)

SYNTHETIC MET 120:1-3 (2001) 953-954

Authors:

E Rzepniewski, RS Edwards, JM Schrama, A Ardavan, J Singleton, M Kurmoo, P Day

Abstract:

We identify two interplane corrugations in the quasi-one-dimensional Fermi surface sections of the organic superconductor kappa-(BEDT-TTF)(2)Cu(SCN)(2). The warping directions are 17.3 degrees and -19.4 degrees relative to the crystal a* axis.

Numerical simulation of angle dependent magnetoresistances oscillations in alpha-(BEDT-TTF)(2)KHg(SCN)(4)

SYNTHETIC MET 120:1-3 (2001) 983-984

Authors:

MS Nam, A Ardavan, SJ Blundell, J Singleton

Abstract:

We present a numerical simulation of angle dependent magnetoresistances oscillations(AMROs) in alpha-(BEDT-TTF)(2)KHg(SCN)(4). The nesting vector of the density wave and the magnetic breakdowngap in the low-temperature, low-magnetic-field state (LTLF) are constrained by simulations of quasi-one-dimensional (Q1D) AMRO. Quasi-two-dimensional (Q2D) AMRO simulations for the high-temperature, high-magnetic-field state (HTHF) allow the precise derivation of an ellipticity of the Q2D Fermi surface. Simulations of the field dependent AMRO demonstrate the gradual evolution of the FS from LTLF to HTHF states toward the kink transition at 23 T.

Numerical simulation of angle dependent magnetoresistances oscillations in 伪-(BEDT-TTF)2KHg(SCN)4

Synthetic Metals 120:1-3 (2001) 983-984

Authors:

MS Nam, A Ardavan, SJ Blundell, J Singleton

Abstract:

We present a numerical simulation of angle dependent magnetoresistances oscillations (AMROs) in 伪-(BEDT-TTF)2KHg(SCN)4. The nesting vector of the density wave and the magnetic breakdowngap in the low-temperature, low-magnetic-field state (LTLF) are constrained by simulations of quasi-one-dimensional (Q1D) AMRO. Quasi-two-dimensional (Q2D) AMRO simulations for the high-temperature, high-magnetic-field state (HTHF) allow the precise derivation of an ellipticity of the Q2D Fermi surface. Simulations of the field dependent AMRO demonstrate the gradual evolution of the FS from LTLF to HTHF states toward the kink transition at 23 T.

Observation of the Fulde-Ferrell-Larkin-Ovchinnikov state in kappa-(BEDT-TTF)(2)Cu(NCS)(2).

SYNTHETIC MET 120:1-3 (2001) 711-712

Authors:

JA Symington, J Singleton, MS Nam, A Ardavan, M Kurmoo, JA Schlueter, P Day

Abstract:

Magnetic measurements show that the quasi-two-dimensional superconductor kappa-(BEDT-TTF)(2)Cu(NCS)(2) enters a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state below similar to 5.5 K in exactly in-plane magnetic fields similar to 19 - 24 T.

Observation of the Fulde-Ferrell-Larkin-Ovchinnikov state in 魏-(BEDT-TTF)2Cu(NCS)2

Synthetic Metals 120:1-3 (2001) 711-712

Authors:

JA Symington, J Singleton, MS Nam, A Ardavan, M Kurmoo, JA Schlueter, P Day

Abstract:

The quasi-two-dimensional superconductor was studied via magnetic measurements. It was observed that the sample entered a Fulde-Ferrell-Larkin-Ovchinnikov state below 5.5 K in an exact in-plane magnetic field. The evidence of the transition of the sample was further studied.