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Data For "Targeted Chemical Pressure Yields Tunable Millimeter-Wave Dielectric "

Included here are figures and other relevant data from the paper "Targeted Chemical Pressure Yields Tunable Millimeter-Wave 5G Dielectric with Unparalleled Performance" published online in Nature Materials on 23 December 2019 (https://doi.org/10.1038/s41563-019-0564-4). Abstract: Epitaxial strain can unlock enhanced properties in oxide materials but restricts substrate choice and maximum film thickness, above which lattice relaxation and property degradation occur. Here we employ a chemical alternative to epitaxial strain by providing targeted chemical pressure, distinct from random doping, to induce a ferroelectric instability with the strategic introduction of barium into today's best millimeter-wave tunable dielectric, the epitaxially strained 50 nm thick n = 6 (SrTiO3)nSrO Ruddlesden-Popper grown on (110) DyScO3. The defect mitigating nature of (SrTiO3)nSrO results in unprecedented low loss at frequencies up to 125 GHz. No barium-containing Ruddlesden-Popper titanates are known, but this atomically-engineered superlattice material, (SrTiO3)n?m(BaTiO3)mSrO, enables low-loss, tunable dielectric properties to be achieved with lower epitaxial strain and a 200 % improvement in the figure of merit at commercially-relevant millimeter-wave frequencies. As tunable dielectrics are key constituents for emerging millimeter-wave high-frequency devices in telecommunications our findings could lead to higher performance adaptive and reconfigurable electronics at these frequencies.
Organization: Department of Commerce
Last updated: 2020-11-12T14:50:32.594972
Tags: 5g, barium, density-functional-theory, deposition, dft, dielectric-constant, filters, frequency-agile, loss-tangent, low-loss, materials, microwave, millimeter-wave, molecular-beam-epitaxy, permittivity, physical-vapor, resonators, ruddlesden-popper, strain-engineering, strontium, superlattice, targeted-chemical-pressure, titanate, tunability

Tables

Figure 2: Data For The X-Ray Diffraction Curves Of The Ba-containing STO Ruddlesden-Popper Films (n=2-6)

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_2_for_the_x_ray_diffraction_curves_of_the_ba_co_b75621c5

33.5 kB
1,978 rows
6 columns

CREATE TABLE figure_2_for_the_x_ray_diffraction_curves_of_the_ba_co_b75621c5 (
  "x_ray_diffraction_of_the_50_nm_srtio3_n_1_batio3_1sro__68a36a23" VARCHAR  -- X-ray Diffraction Data Of The 50 Nm (SrTiO3)n-1(BaTiO3)1SrO Thin Films On (110) DyScO3,
  "unnamed_1" VARCHAR  -- Unnamed: 1,
  "unnamed_2" VARCHAR  -- Unnamed: 2,
  "unnamed_3" VARCHAR  -- Unnamed: 3,
  "unnamed_4" VARCHAR  -- Unnamed: 4,
  "unnamed_5" VARCHAR  -- Unnamed: 5
);

Figure 3(a): Data For The Dielectric Constant (K11) Vs. Temperature Curves For The Ba-containing STO Ruddlesden-Popper Films From N=2-6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_3_a_for_the_dielectric_constant_k11_vs_temperat_274d8818

28.57 kB
71 rows
24 columns

CREATE TABLE figure_3_a_for_the_dielectric_constant_k11_vs_temperat_274d8818 (
  "real_part_of_the_in_plane_dielectric_constan_tk11_and__3360d621" VARCHAR  -- Real Part Of The In-Plane Dielectric Constan TK11 And Tan(d) With Temperature And Frequency,
  "unnamed_1" VARCHAR  -- Unnamed: 1,
  "unnamed_2" VARCHAR  -- Unnamed: 2,
  "unnamed_3" VARCHAR  -- Unnamed: 3,
  "unnamed_4" VARCHAR  -- Unnamed: 4,
  "unnamed_5" VARCHAR  -- Unnamed: 5,
  "unnamed_6" VARCHAR  -- Unnamed: 6,
  "unnamed_7" VARCHAR  -- Unnamed: 7,
  "unnamed_8" VARCHAR  -- Unnamed: 8,
  "unnamed_9" VARCHAR  -- Unnamed: 9,
  "unnamed_10" VARCHAR  -- Unnamed: 10,
  "unnamed_11" VARCHAR  -- Unnamed: 11,
  "unnamed_12" VARCHAR  -- Unnamed: 12,
  "unnamed_13" VARCHAR  -- Unnamed: 13,
  "unnamed_14" VARCHAR  -- Unnamed: 14,
  "unnamed_15" VARCHAR  -- Unnamed: 15,
  "unnamed_16" VARCHAR  -- Unnamed: 16,
  "unnamed_17" VARCHAR  -- Unnamed: 17,
  "unnamed_18" VARCHAR  -- Unnamed: 18,
  "unnamed_19" VARCHAR  -- Unnamed: 19,
  "unnamed_20" VARCHAR  -- Unnamed: 20,
  "unnamed_21" VARCHAR  -- Unnamed: 21,
  "unnamed_22" VARCHAR  -- Unnamed: 22,
  "unnamed_23" VARCHAR  -- Unnamed: 23
);

Figure 3(b): Data For The Ferroelectric Transition Temperature (Tc) Vs. Series Number (n) Plots For The Ba-containing STO Ruddlesden-Popper Films From N=2-6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_3_b_for_the_ferroelectric_transition_temperatur_12b90306

3.3 kB
9 rows
3 columns

CREATE TABLE figure_3_b_for_the_ferroelectric_transition_temperatur_12b90306 (
  "temperautre_of_max_k11_in_plane_dielectric_constant" VARCHAR,
  "unnamed_1" VARCHAR  -- Unnamed: 1,
  "unnamed_2" VARCHAR  -- Unnamed: 2
);

Figure 3(c): Data For The Lattice Parameter (a) / Strain Vs. Series Number (n) Plot For The Ba-containing STO Ruddlesden-Popper Films From N=2-6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_3_c_for_the_lattice_parameter_a_strain_vs_serie_9e724bd0

3.17 kB
6 rows
3 columns

CREATE TABLE figure_3_c_for_the_lattice_parameter_a_strain_vs_serie_9e724bd0 (
  "n" BIGINT,
  "n__sto_n_sro" DOUBLE  -- (STO) {n}SrO,
  "sto_n_1_bto_1_sro" DOUBLE  -- STO {n-1}BTO {1}SrO
);

Figure 3(d): Data For The Energy Vs. Total Ionic Distortion Curves For The Ba-containing And Ba-free STO Ruddlesden-Popper Films With N = 2,4,6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_3_d_for_the_energy_vs_total_ionic_distortion_cu_18480fa0

2.84 kB
62 rows
2 columns

CREATE TABLE figure_3_d_for_the_energy_vs_total_ionic_distortion_cu_18480fa0 (
  "sto_n_sro" VARCHAR  -- STO {n}SrO,
  "unnamed_1" VARCHAR  -- Unnamed: 1
);

Figure 4(a): Data For The Complex Dielectric Constant (K11) Vs. Frequency Curves For The 100 Nm Ba-containing STO Ruddlesden-Popper Films With N=6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_4_a_for_the_complex_dielectric_constant_k11_vs__39e05d6e

17.68 kB
537 rows
3 columns

CREATE TABLE figure_4_a_for_the_complex_dielectric_constant_k11_vs__39e05d6e (
  "frequency_hz" DOUBLE  -- Frequency (Hz),
  "dielectric_constant" DOUBLE  -- Dielectric Constant (?'),
  "dielectric_loss" DOUBLE  -- Dielectric Loss (?'')
);

Figure 4(a)[inset]: Data For The Loss Tangent Vs. Frequency Curve For The 100 Nm Ba-containing STO Ruddlesden-Popper Films With N=6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_4_a_inset_for_the_loss_tangent_vs_frequency_cur_c0c1044d

8.83 kB
367 rows
2 columns

CREATE TABLE figure_4_a_inset_for_the_loss_tangent_vs_frequency_cur_c0c1044d (
  "frequency_hz" DOUBLE  -- Frequency (Hz),
  "loss_tangent" DOUBLE
);

Figure 4(b): Data For The Dielectric Constant Tunability Vs. Applied Bias Electric Field Curves For The 100 Nm Ba-containing STO Ruddlesden-Popper Films From N=6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_4_b_for_the_dielectric_constant_tunability_vs_a_62b3d489

10.04 kB
181 rows
4 columns

CREATE TABLE figure_4_b_for_the_dielectric_constant_tunability_vs_a_62b3d489 (
  "applied_electric_field_kv_cm" BIGINT  -- Applied Electric Field (kV/cm),
  "relative_tunability_of_the_film_n_r_5_ghz" DOUBLE  -- Relative Tunability Of The Film (n R) @ 5 GHz,
  "relative_tunability_of_the_film_n_r_20_ghz" DOUBLE  -- Relative Tunability Of The Film (n R) @ 20 GHz,
  "relative_tunability_of_the_film_n_r_40_ghz" DOUBLE  -- Relative Tunability Of The Film (n R) @ 40 GHz
);

Figure 4(c): Data For The Figure Of Merit (FOM) Vs. Frequency Curves For The 100 Nm Ba-containing STO Ruddlesden-Popper Films With N=6

@usgov.doc_gov_data_for_targeted_chemical_pressure_yields_tun_bc0f170b.figure_4_c_for_the_figure_of_merit_fom_vs_frequency_cu_a640194b

7.27 kB
275 rows
2 columns

CREATE TABLE figure_4_c_for_the_figure_of_merit_fom_vs_frequency_cu_a640194b (
  "frequency_hz" DOUBLE  -- Frequency (Hz),
  "figure_of_merit" DOUBLE
);