The Increasing Role of Market Forces in He

Cardoso, Sónia; Rosa, Maria João; Tavares, Diana; Amaral, Alberto

doi:10.1007/978-94-6091-466-9_5

Cited by 2 publications

(6 citation statements)

References 2 publications

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“…We start by optimizing the crystal structure with respect to the Si position z Si by minimizing the total energy obtained from our band structure calculations whilst keeping the lattice parameters a and c fixed at their precisely determined experimental values (cf table 1). As can be seen from figure 1 the total energy is minimal for z Si = 0.381 c. This value agrees with that obtained from crystal structure refinement z Si = 0.379(2) c within experimental accuracy [11]. Moreover, the energy difference between the experimental and relaxed Si position amounts to ≈10 meV (≈100 K) only.…”

Section: Electronic Structure and Fermi Surfacesupporting

confidence: 87%

“…Lattice parameters of LuRh 2 Si 2 were obtained at room temperature from x-ray diffraction measurements of powdered single crystals [10]. The Wyckoff positions z Si were deduced from single crystalline structure refinement [11]. For YbRh 2 Si 2 the height of the unit cell, c, has been reported to depend on the exact Rh content [12] whereas no change in the z Si parameter was resolved [11,13].…”

Section: Introductionmentioning

confidence: 99%

“…The Wyckoff positions z Si were deduced from single crystalline structure refinement [11]. For YbRh 2 Si 2 the height of the unit cell, c, has been reported to depend on the exact Rh content [12] whereas no change in the z Si parameter was resolved [11,13]. So far no indications for variations in the Rh content or c have been reported for LuRh 2 Si 2 4.007(1) 9.858 − 9.862 0.379 (2) of the Fermi surface which is not expected at a QCP where the magnetic order parameter evolves continuously.…”

Section: Introductionmentioning

confidence: 99%

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Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂

et al. 2013

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We present band structure calculations and quantum oscillation measurements on LuRh 2 Si 2 , which is an ideal reference to the intensively studied quantum critical heavy-fermion system YbRh 2 Si 2 . Our band structure calculations show a strong sensitivity of the Fermi surface on the position of the silicon atoms z Si within the unit cell. Single crystal structure refinement and comparison of predicted and observed quantum oscillation frequencies and masses yield z Si = 0.379 c in good agreement with numerical lattice relaxation.This value of z Si is suggested for future band structure calculations on LuRh 2 Si 2 and YbRh 2 Si 2 . LuRh 2 Si 2 with a full f electron shell represents the 'small' Fermi surface configuration of YbRh 2 Si 2 . Our experimentally and ab intio derived quantum oscillation frequencies of LuRh 2 Si 2 differ significantly from the results of earlier measurements on YbRh 2 Si 2 . Consequently, our results confirm the contribution of the f electrons to the Fermi surface of YbRh 2 Si 2 at

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Section: Electronic Structure and Fermi Surfacesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂

et al. 2013

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“…This field TABLE I: Lattice parameters of LuRh2Si2 were obtained at room temperature from x-ray diffraction measurements of powdered single crystals 6 . The Wyckoff positions zSi were deduced from single crystalline structure refinement 7 . For YbRh2Si2 the height of the unit cell, c, has been reported to depend on the exact Rh content 8 whereas no change in the zSi parameter was resolved 7 .…”

Section: Introductionmentioning

confidence: 99%

“…The Wyckoff positions zSi were deduced from single crystalline structure refinement 7 . For YbRh2Si2 the height of the unit cell, c, has been reported to depend on the exact Rh content 8 whereas no change in the zSi parameter was resolved 7 .…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure of LuRh2Si2: "Small" Fermi Surface Reference to YbRh2Si2

Friedemann,

Goh,

Rourke

et al. 2013

Preprint

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We present band structure calculations and quantum oscillation measurements on LuRh2Si2, which is an ideal reference to the intensively studied quantum critical heavy-fermion system YbRh2Si2. Our band structure calculations show a strong sensitivity of the Fermi surface on the position of the silicon atoms zSi within the unit cell. Single crystal structure refinement and comparison of predicted and observed quantum oscillation frequencies and masses yield zSi = 0.379 c in good agreement with numerical lattice relaxation. This value of zSi is suggested for future band structure calculations on LuRh2Si2 and YbRh2Si2. LuRh2Si2 with a full f electron shell represents the "small" Fermi surface configuration of YbRh2Si2. Our experimentally and ab intio derived quantum oscillation frequencies of LuRh2Si2 show strong differences with earlier measurements on YbRh2Si2. Consequently, our results confirm the contribution of the f electrons to the Fermi surface of YbRh2Si2 at high magnetic fields. Yet the limited agreement with refined fully itinerant local density approximation calculations highlights the need for more elaborated models to describe the Fermi surface of YbRh2Si2.

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The Increasing Role of Market Forces in He

Cited by 2 publications

References 2 publications

Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂

Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂

Electronic Structure of LuRh2Si2: "Small" Fermi Surface Reference to YbRh2Si2

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The Increasing Role of Market Forces in He

Cited by 2 publications

References 2 publications

Electronic structure of LuRh2Si2: ‘small’ Fermi surface reference to YbRh2Si2

Electronic structure of LuRh2Si2: ‘small’ Fermi surface reference to YbRh2Si2

Electronic Structure of LuRh2Si2: "Small" Fermi Surface Reference to YbRh2Si2

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Product

Resources

About

Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂

Electronic structure of LuRh₂Si₂: ‘small’ Fermi surface reference to YbRh₂Si₂