Magnetic-field-enhanced electron-electron scattering in the resistivity of copper

Thummes, G.; Kötzler, J.

doi:10.1103/physrevb.31.2535

Cited by 17 publications

(19 citation statements)

References 16 publications

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“…S3). This trend is somewhat expected, because the magnetic field suppresses the ZXT kinetic energy of the electrons hence enhances the electron-electron interaction effects [17].…”

Section: Resultsmentioning

confidence: 85%

Fermi liquid behavior and colossal magnetoresistance in layered MoOCl2

Wang

Huang

Zhao

et al. 2020

Phys. Rev. Materials

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A characteristic of a Fermi liquid is the dependence of its resistivity, sometimes referred to as the Baber law. However, for most metals, this behavior is only restricted to very low temperatures, usually below 20 K. Here, we experimentally demonstrate that for the single-crystal van der Waals layered material MoOCl2, the Baber law holds in a wide temperature range up to ~120 K, indicating that the electron-electron scattering plays a dominant role in this material. Combining with the specific heat measurement, we find that the modified Kadowaki-Woods ratio of the material agrees well with many other strongly correlated metals. Furthermore, in the magneto-transport measurement, a colossal magneto-resistance is observed, which reaches ~350% at 9 T and displays no sign of saturation. With the help of first-principles calculations, we attribute this behavior to the presence of open orbits on the Fermi surface. We also suggest that the dominance of electron-electron scattering is related to an incipient charge density wave state of the material.Our results establish MoOCl2 as a strongly correlated metal and shed light on the underlying physical mechanism, which may open a new path for exploring the effects of electron-electron interaction in van der Waals layered structures.

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“…S3). This trend is somewhat expected, because the magnetic field suppresses the ZXT kinetic energy of the electrons hence enhances the electron-electron interaction effects [17].…”

Section: Resultsmentioning

confidence: 85%

Fermi liquid behavior and colossal magnetoresistance in layered MoOCl2

Wang

Huang

Zhao

et al. 2020

Phys. Rev. Materials

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“…KW assume dislocation scattering to be the source of anisotropy in z ( K ) and derive an expression for the enhancement of A,, by dislocations Here pimp and pdis denote the contributions of (isotropic) impurity and (anisotropic) dislocation scattering to the residual resistivity pr = p(T+ 0) of a metal sample. When the isotropic limitA Et and the 'sample dependence' SD (defined in equation (3.10)) are used as fitting parameters, then fairly good agreement is found with the experimental data for K and Cu (Steenwyck et a1 1981, Zwart et a1 1983, Thummes and Kotzler 1985.…”

Section: Introductionmentioning

confidence: 69%

“…Recently, Thummes and Kotzler (1985) have also observed a strong enhancement of A,, by a high longitudinal magnetic field in single crystals of Cu. The enhancement is related qualitatively to a magnetic-field-induced anisotropy in z ( K ) .…”

Section: Introductionmentioning

confidence: 92%

“…The second anisotropy model to be considered in the calculation of A,, is based on the effect of a longitudinal magnetic field applied to a noble metal (Cu, Ag, Au). The model has been used by Thummes and Kotzler (1985) to explain qualitatively their observed enhancement ofA,, in Cu by a high longitudinal field. The basic idea, originally suggested by Pippard (1964) in his explanation of the longitudinal magnetoresistance in Cu, is that for W,T S=-1 (U, = cyclotron frequency) the fast rotating necks on the FS form belts.…”

Section: Magnetic-field-induced Anisotropymentioning

confidence: 99%

“…We consider two anisotropy models which are introduced in 8 2. These models are (i) dislocation-induced anisotropy according to KW (1980KW ( ,1982, and (ii) magneticfield-induced anisotropy in z ( K ) in a Cu single crystal as proposed by Thummes and Kotzler (1985). The calculations of A,, (8 3) are made by use of the RTA and, for the first time, also by use of the formally exact variational method (see for example Kohler 1948, andZiman 1960), which allows conclusions about the validity of the RTA results.…”

Section: Introductionmentioning

confidence: 99%

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Effects of an anisotropic relaxation time on the electron-electron scattering resistivity in K and Cu

Sprengel¹,

Thummes²,

Appel³

1989

J. Phys.: Condens. Matter

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The contribution of normal electron-electron scattering to the electrical resistivity of K and Cuin the presence of an anisotropic relaxation time is calculated using the relaxation time approximation (RTA) and also, for the first time, using the formally exact variational method. As sources of anisotropic scattering we consider (i) electron-dislocation scattering according to a model of Kaveh and Wiser for potassium, and (ii) a high longitudinal magnetic field B applied to a copper single crystal. It is found that, as compared with the variational method, the RTA overestimates the increase of the electron-electron scattering resistivity pee = A , , p with anisotropy. The calculated enhancement ofA,, in copper by a magnetic field depends sensitively on the crystallographic orientation. Comparison with the experimental coefficients A,, for B I/ (111) yields an Umklapp fraction of A = 0.04-0.06 for electronelectron scattering in Cu, which is smaller than A = 0.28 as previously calculated by Black. The dislocation model cannot account quantitatively for the large variation in the experimental A,, in potassium.

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